ASTERACEAE: H through Z

Helenium amarum (Raf.) H. Rock var. amarum yellowdicks [US; Louisiana; Calcasieu Parish, Lake Charles; T10S, R8W, S19; 15 feet][along roadside in front of Saint John Lutheran Church at 600 University Dr.; June 18, 1994; Collected & identified by Chuck Walker; #LA102]

Helenium amarum (Raf.) H. Rock var. amarum yellowdicks [US; Mississippi; Washington County, Leland; T18N, R7W, S14; 33 deg. 24.295'N, 90 deg. 53.992�W; 125 feet][Along Illinois Central Railroad tracks, across from 107 N. Main St.; August 5, 2008; Collected by Dr. Nathan Schiff; Identified by Carl Smith; #MS148]

Helenium flexuosum Raf. purplehead sneezeweed [US; Arkansas; Drew County; Collins; T14S, R4W, S32; 33 deg. 26.398'N, 91 deg. 32.076'W; 120 feet][along trail southeast of concrete walk-way across Cut-Off Creek, Camping Area 1, Cut-Off Creek Wildlife Management Area; May 28, 2006; Collected by Chuck Walker; Identified by Danny Skojac & Chuck Walker; #AR22]

Helianthus annuus L. common sunflower [US; Arizona; Yavapai County; Prescott; T14N, R2W, S34; 5,380 feet][slope leading down to ditch in northwest quadrant of Sheldon St.-Washington Ave. intersection; July 19, 1996; Collected & identified by Chuck Walker; #AZ336]

Helianthus hirsutus Raf. hairy sunflower [US; Iowa; Fremont County; T68N, R42W, S29; 1,210 feet] [east side of #239, near the entrance to Waubonsie State Park; July 23, 1999; Collected & identified by Chuck Walker; #IA75]

Helianthus nuttallii Torr. & Gray ssp.nuttallii Nuttall�s sunflower [US; Arizona; Yavapai County; Kirkland; T13N, R4W, S32; 3,980 feet][dry creek bed, 1/2 mile east of Kirkland; August 3, 1996; Collected & identified by Chuck Walker; #AZ348]

Helianthus pauciflorus Nutt. stiff sunflower [US; Iowa; Fremont County; T68N, R42W, S29; 1,200 feet] [western edge of Campgrounds near its northern terminus, Waubonsie State Park; August 29, 1999; Collected & identified by Chuck Walker; #IA119]

Helianthus petiolaris Nutt. ssp. fallax Heiser prairie sunflower [US; Arizona; Yavapai County; Paulden; T17N, R2W, S12; 4,210 feet][along Verde River, 1/2 mile downstream from its confluence with Granite Creek; August 25, 1996; Collected & identified by Chuck Walker; #AZ389]

Heliopsis helianthoides (L.) Sweet smooth oxeye [US; Illinois; Jackson County; T10S, R3W, S2; 37 deg. 40.867'N, 89 deg. 24.029'W; 880 feet][along trail leading from upper trailhead to Lookout, Little Grand Canyon; July 15, 2002; Collected by Chuck Walker; Identified by Dr. Mark A. Basinger; #IL370]

Hemizonia lobbii Greene threeray tarweed [US; California; Lassen County; T39N, R7E, S32; 41 deg. 10.151'N, 121 deg. 10.928'W; 4,180 feet][southeast portion of vernal pond; July 7, 2004; Collected by Matt Minarchek & Chuck Walker; Identified by Michael Dolan; #CA37]

Heterotheca camporum (Greene) Shinners var. camporum lemonyellow false goldenaster [US; Illinois; Calhoun County; Brussels; T13S, R1W, S15; 425 feet][east side of Sandy Ridge Rd., one mile north of Deer Plain Rd (450 N); July 14, 2000; Collected & identified by Chuck Walker; #IL33]

Heterotheca fulcrata (Greene) Shinners rockyscree false goldenaster [US; Arizona; Yavapai County; Prescott; T12N, R2W, S24; 6,940 feet] [three miles from Spruce Mountain, along trail #377 (Isabella trail #67); July 20, 1997; Collected & identified by Chuck Walker; #AZ471]

Heterotheca subaxillaris (Lam.) Britt. & Rusby camphorweed [US; Arizona; Yavapai County, Dewey; T13N, R1E, S2; 4,600 feet][north side of Highway 69, one mile from Highway 169; July 28, 1996; Collected & identified by Chuck Walker; #AZ341]

Hieracium aurantiacum L. orange hawkweed [US; Wisconsin; Ashland County; T45N, R2W, S15; 1,180 feet][Glen Colver farm, east side of Highway 169, one mile north of Becker Road, 4.5 miles northeast of Mellen; September 8, 2001; Collected by Chuck Walker; Identified by Dr. Beth Middleton; #WI25]

Hieracium gronovii L. queendevil [US; Illinois; Jackson County; T10S, R3W, S1; 37 deg. 41.152'N, 89 deg. 23.758'W; 520 feet] [along trail, Little Grand Canyon; July 15, 2002; Collected by Chuck Walker; Identified by Dr. Mark A. Basinger; #IL372]

Hieracium scouleri Hook. var. scouleri Scouler's woollyweed [US; California; Lassen County; T37N, R12E, S2; 41 deg. 3.840�N, 120 deg. 33.365'W; 5,780 feet][shaded area on hillside above drainage from Stipa Spring (0.5 miles south-south-east of it), in association with Juniperus occidentalis; July 20, 2005; Collected by Chuck Walker; Identified by Michael Dolan; #CA298]

Hymenoclea salsola Torr. & Gray ex Gray burrobrush [US; Arizona; Yavapai County; Bagdad; T12N, R9W, S22; 1,840 feet][southern end of Santa Maria River Rd at its junction with Highway 93; May 18, 1996; Collected & identified by Chuck Walker; #AZ282]

Hymenopappus filifolius Hook. fineleaf hymenopappus [US; New Mexico; Cibola County; T11N, R11W, S22; 6,400 feet][along Highway 117, 1/4 mile south from its intersection with I-40; May 19, 1997; Collected by Queen Ottawa & Chuck Walker; Identified by Chuck Walker; #NM03]

Hymenoxys hoopesii (Gray) Bierner owl�s-claws [US; Arizona; Coconino County; T23N, R7E, S32; 10,500 feet] [800 m down trail from the saddle between Mount Humphreys & Mount Agasiz; July 27, 1997; Collected & identified by Chuck Walker; #AZ490]

Iva annua L. annual marshelder [US; Illinois; Calhoun County; T11S, R2W, S31; 435 feet][northeast corner of Boat Launch at Prairie Lake Recreational Area, Batchtown Division, Two Rivers National Wildlife Refuge; August 27, 2000; Collected & identified by Chuck Walker; #IL68]

Krigia biflora (Walt.) Blake var. biflora twoflower dwarfdandelion [US; Wisconsin; Dane County; T9N, R8E, S4; 880 feet][south-facing hillside, west side of Springfield Road, Lodi Marsh State Wildlife Area, three miles southwest of Lodi; September 7, 2001; Collected & identified by Chuck Walker; #WI07]

Krigia cespitosa (Raf.) Chambers weedy dwarfdandelion [US; Louisiana; Calcasieu Parish; Lake Charles; T10S, R8W, S19; 15 feet][top of east bank of Contraband Bayou, 20 m north of Contour Dr-E Parkway intersection; April 11, 2000; Collected by Chuck Walker; Identified by Dr. Ray Neyland; #LA243]

Krigia cespitosa (Raf.) Chambers weedy dwarfdandelion [US; Mississippi; Washington County; T19N, R7W, S33; 33 deg. 27.306'N, 90 deg. 55.489'W; 115 feet][USDA Compound, Delta Experimental Forest, about three miles north of Stoneville; April 10, 2006; Collected by Chuck Walker; Identified by Danny Skojac; #MS60]

Lactuca floridana (L.) Gaertn. woodland lettuce [US; Louisiana; Calcasieu Parish; Lake Charles; T10S, R8W, S16; 15 feet][southeast corner of Park Place Apartments parking lot at 3619 Texas St.; July 25, 1994; Collected & identified by Chuck Walker; #LA134]

Lactuca saligna L. willowleaf lettuce [US; Illinois; Calhoun County; Brussels; T12S, R1W, S18; 425 feet][along road between dike (separating Middle Swan Lake from Upper Swan Lake) & Department of Natural Resources pump station; September 19, 2000; Collected & identified by Chuck Walker; #IL86]

Lactuca serriola L. prickly lettuce [US; Illinois; Jackson County; Carbondale; T9S, R1W, S33; 430 feet][east side of E. Minnesota Rd., at its junction with Pleasant Hill Rd.; July 6, 2001; Collected & identified by Chuck Walker; #IL197]

Lactuca tatarica (L.) C.A. Mey. var. pulchella (Pursh) Breitung blue lettuce [US; Iowa; Fremont County; T68N, R42W, S29; 1,250 feet][along path leading down to large Civilian Conservation Corp shelter, Waubonsie State Park; August 28, 1999; Collected & identified by Chuck Walker; #IA114]

Laennecia coulteri (Gray) Nesom conyza [US; Arizona; Yavapai County; Prescott; T13N, R2W, S4; 5,360 feet] [ditch, southeast corner of Marina St.-Goodwin St. intersection; June 28, 1997; Collected & identified by Chuck Walker; #AZ453]

Lapsana communis L. common nipplewort [US; Washington; Spokane County; Spokane; T25N, R43E, S29; 2,260 feet][Ferris Perennial Garden, Manito Park; June 17, 1998; Collected & identified by Chuck Walker; #WA48]

Layia glandulosa (Hook.) Hook. & Arn. whitedaisy tidytips [US; California; Shasta County; T36N, R5E, S13; 40 deg. 57.602'N, 121 deg. 20.402'W; 3,680 feet][sandy soil, sagebrush flat, near wildlife guzzler, west side of Road #111, five miles north of Coble Mountain; May 6, 2005; Collected by Karman Prisco & Chuck Walker; Identified by Mike Dolan; #CA187]

Leucanthemum vulgare Lam. oxeye daisy [US; Illinois; Williamson County; Carterville; T9S, R1E, S13; 440 feet][3 m southwest of Coal Rd.-Automotive Dr., College of Applied Science, Southern Illinois University; May 11, 2001; Collected & identified by Chuck Walker; #IL125]

Liatris acidota Engelm. & Gray sharp blazing star [US; Louisiana; Calcasieu Parish; Lake Charles; T10S, R8W, S29; 15 feet][field between Tallow Rd. & Link Rd., 50 m from their eastern-most ends; July 24, 1994; Collected & identified by Chuck Walker; #LA133]

Liatris aspera Michx. tall blazing star [US; Illinois; Johnson County; Simpson; T12S, R4E; 500 feet] [woods; September 21, 2002; Collected & identified by Chuck Walker; #IL439]

Liatris cylindracea Michx. Ontario blazing star [US; Illinois; Monroe County; Fults; T4S, R10W, S27; 38 deg. 9.454'N, 90 deg. 11.480'W; 600 feet][at edge of limestone cliff, Fults Hill Prairie Nature Preserve; July 22, 2002; Collected by Chuck Walker; Identified by Dr. Mark A. Basinger; #IL397]

Liatris elegans (Walt.) Michx. var. elegans pinkscale blazing star [US; Arkansas; Pike County; T6S, R25W, S17; 34 deg. 13.955'N, 93 deg. 41.270'W; 560 feet] [along Swinging Bridge Trail, Lake Greeson, Kirby Landing Public Use Area; September 4, 2006; Collected & identified by Chuck Walker; #AR54]

Liatris punctata Hook. dotted blazing star [US; Iowa; Fremont County; T68N, R42W, S32; 1,200 feet] [beginning of trail through prairie, end of loop in upper picnic area, Waubonsie State Park; September 2, 1999; Collected & identified by Chuck Walker; #IA124]

Liatris pycnostachya Michx. var. pycnostachya prairie blazing star [US; Illinois; Jackson County; Ward; T8S, R1W, S5; 37 deg. 51.231'N, 89 deg. 13.855'W; 410 feet][field at south end of paint test strip road, Faulkner-Franke Nature Preserve; July 8, 2002; Collected by Chuck Walker; Identified by Dr. Mark A. Basinger; #IL344

Liatris squarrosa (L.) Michx. var. squarrosa scaly blazing star [US; Illinois; Pope County; Hamletsburg; T15S, R7E; 520 feet][along unpaved road; August 11, 2002; Collected by Nathan Small & Chuck Walker; Identified by Chuck Walker; #IL420]

Machaeranthera canescens (Pursh) Gray ssp. canescens var. canescens cutleaf goldenweed [US; Arizona; Yavapai County; Prescott; T14N, R2W, S35; 5,420 feet] [hillside overlooking Chevron station at 1601 E. Highway 69; June 13, 1995; Collected & identified by Chuck Walker; #AZ165]

Machaeranthera gracilis (Nutt.) Shinners slender goldenweed [US; Arizona; Yavapai County; Prescott; T13N, R2W, S4; 5,360 feet] [east side of 300 block of S. Montezuma St.; May 29, 1995; Collected & identified by Chuck Walker; #AZ151]

Madia glomerata Hook. mountain tarweed [US; California; Lassen County; T37N, R15E, S5; 41 deg. 06.487'N, 120 deg. 17.335'W; 6,720 feet][open hillside with Wyethia mollis, Bromus tectorum, Warner Mountains; July 1, 2004; Collected by Matt Minarchek & Chuck Walker; Identified by Chuck Walker; #CA30]

Madia minima (Gray) Keck oppositeleaved tarweed [US; California; Shasta County; T36N, R5E, S13; 40 deg. 57.602'N, 121 deg. 20.402'W; 3,680 feet][sandy soil, sagebrush flat, near wildlife guzzler, west side of Road #111, five miles north of Coble Mountain; May 6, 2005; Collected by Karman Prisco & Chuck Walker; Identified by Michael Dolan; #CA188]

Malacothrix glabrata (Gray ex D.C.Eat.) Gray smooth desertdandelion [US; Arizona; Coconino County; Page; T41N, R8E, S36; 4,100 feet][vacant lot, 50 m southwest of Highway 89-89L junction; April 26, 1997; Collected by Debby Denny & Chuck Walker; Identified by Chuck Walker; #AZ448]

Matricaria discoidea DC. disc mayweed [US; Missouri; Bates County; Rich Hill; T38N, R31W, S8; 800 feet] [Smitty's Car Wash, E. Park-S.14th St. intersection; May 21, 1997; Collected & identified by Chuck Walker; #MO01]

Mikania scandens (L.) Willd. climbing hempvine [US; Louisiana; Calcasieu Parish; Lake Charles; T10S, R8W, S30; 15 feet][marsh, west of Leger Rd., south of Predium Rd., along power lines; July 6, 1994; Collected & identified by Chuck Walker; #LA117]

Onopordum acanthium L. Scotch cottonthistle [US; California; Modoc County; T46N, R16E, S4; 41 deg. 52.899'N, 120 deg. 8.522'W; 4,600 feet][along east side of Road #1, 1/2 mile northeast of Fort Bidwell Airport, Baugh Ranch; July 8, 2004; Collected by Chuck Walker; Identified by Michael Dolan; #CA46]

Oreostemma alpigenum (Torr. & Gray) Greene var. andersonii (Gray) Nesom tundra aster [US; California; Lassen County; T37N, R12E, S11; 41 deg. 3.590�N, 120 deg. 33.301'W; 5,710 feet][open area on hillside above drainage from Stipa Spring (0.8 miles south-south-east of it), in association with Juniperus occidentalis; July 20, 2005; Collected & identified by Chuck Walker; #CA300]

Packera aurea (L.) A. L�ve & D. L�ve golden ragwort [US; Illinois; Williamson County; Carbondale; T10S, R1E, SW 1/4 of S15] [understory of floodplain woods, east of the spillway. Devil's Kitchen Lake, southeast of Carbondale ca. seven miles; April 13, 1989; Collected & identified by John McMurray; #89-111]

Packera glabella (Poir) C. Jeffrey butterweed [US; Illinois; Jackson County; Carbondale; T9S, R1W, S28; 430 feet] [south-facing bank, north of Building 1600, Lot 25, Southern Hills; May 6, 2001; Collected & identified by Chuck Walker; #IL117]

Packera glabella (Poir) C. Jeffrey butterweed [US; Mississippi; Sharkey County; T13N, R5W, S21; 32 deg. 57.794'N, 90 deg. 43.880'W; 95 feet] [Interior levee between cells 3 & 4, Flooding Research Facility, six miles east-south-east of Anguilla, April 6, 2006; Collected & identified by Chuck Walker; #MS46]

Packera multilobata (Torr. & Gray ex Gray) W.A. Weber & A. L�ve lobeleaf groundsel [US; Arizona; Yavapai County; Prescott; T13N, R2W, S3; 5,570 feet][Acker property, west of Eastwood Dr.; May 5, 1993; Collected & identified by Chuck Walker; #AZ74]

Packera plattensis (Nutt.) W.A. Weber & A. Love prairie groundsel [US; Iowa; Fremont County; T68N, R42W, S29; 1,200 feet][Ridge trail, 400 m from Main Observation Point, Waubonsie State Park; August 28, 1999; Collected & identified by Chuck Walker; #IA115]

Packera plattensis (Nutt.) W.A. Weber & A. L�ve prairie groundsel [US; Arkansas; Pope County; 35 deg. 33.005'N, 93 deg. 1.578'W; T10N, R19W, S4; 680 feet][on forest floor beneath sweetgum, along drainage, north side of N Fork Road (NF 1310), five miles west of Adams Mountain Road (NF 1328); March 31, 2007; Collected by Chuck Walker; identified by Mike Mibb; #AR64]

Parthenium hysterophorus L. Santa Maria feverfew [US; Mississippi; Washington County; Leland; T18N, R7W, S14; 33 deg. 24.166'N, 90 deg. 54.099'W; 125 feet][along east side of S. Main St., between Garrison St. and Willeroy St; October 15, 2005; Collected & identified by Chuck Walker; #MS08]

Parthenium integrifolium L. wild quinine [US; Illinois; Jackson County; Ward; T8S, R1W, S5; 37 deg. 51.207'N, 89 deg. 13.863'W; 410 feet][field at south end of paint test strip road, Faulkner-Franke Nature Preserve; July 8, 2002; Collected by Chuck Walker; Identified by Dr. Mark A. Basinger; #IL345]

Perityle ciliata (L.H. Dewey) Rydb. fringed rockdaisy [US; Arizona; Yavapai County; Paulden; T17N, R2W, S12; 4,220 feet][rocky ledge on trail (near power lines) leading to north bank of Verde River, 1/2 mile downstream from its convergence with Granite Creek; August 25, 1996; Collected & identified by Chuck Walker; #AZ392]

Picrothamnus desertorum Nutt. bud sagebrush [US; California; Modoc County; T44N, R16E, S34; 41 deg. 38.368'N, 120 deg. 7.666'W; 4,470 feet][along trail down to the southeast edge of Upper Lake, about 4.5 miles east of Lake City; May 14, 2005; Collected & identified by Chuck Walker; #CA203]

Pluchea camphorata (L.) DC. camphor pluchea [US; Mississippi; Sharkey County; T13N, R5W, S21; ~ 32 deg. 57.830'N, 90 deg. 43.900'W; 95 feet] [in ditch, cell 9, Flooding Research Facility, six miles east-south-east of Anguilla, August 19, 2008; Collected by Bryce Burke; Identified by Dr. Emile Gardiner; #MS159]

Pluchea rosea Godfrey rosy camphorweed [US; Louisiana; Calcasieu Parish; Lake Charles; T10S, R8W, S30; 15 feet][old, overgrown road, 300m east of Lake St., 10 m north of Tamela Dr.; June 25, 1994; Collected & identified by Chuck Walker; #LA108]

Polymnia canadensis L. whiteflower leafcup [US; Illinois; Jackson County; Grand Tower; T10S, R4W, S24; 37 deg. 40.522'N, 89 deg. 27.71'W; 360 feet][along old road along Mississippi River, Grand Tower Campground and Picnic Area (Devil's Backbone Park), south of Picnic Area; June 24, 2002; Collected by Chuck Walker; Identified by Dr. Mark A. Basinger; #IL332]

Pseudognaphalium macounii (Greene) Kartesz, comb. Nov. ined. winged cudweed [US; Arizona; Yavapai County; Prescott; T13N, R2W, S5; 5,480 feet] [845 Arroyo Circle, Mountain Club; October 8, 1995; Collected & identified by Chuck Walker; #AZ236]

Pseudognaphalium obtusifolium (L.) Hilliard & Burtt ssp. obtusifolium rabbit-tobacco [US; Illinois; Calhoun County; Brussels; T13S, R1W, S16; 435 feet][5 m west of southwest portion of Maintenance Yard, Two Rivers National Wildlife Refuge; September 16, 2000; Collected & identified by Chuck Walker; #IL82]

Pseudognaphalium obtusifolium (L.) Hilliard & Burtt ssp. obtusifolium rabbit-tobacco [US; Missouri; Shannon County; T28N, R6W, S36; 37 deg. 3.672'N, 91 deg. 33.704'W; 760 feet] [Rymer Campgrounds, Ozark National Scenic Riverways, ten miles northeast of Mountain View; September 7, 2007; Collected & identified by Chuck Walker; #MO17]

Pseudogynoxys chenopodioides Kunth Mexican flamevine [Origin: Mexico][US; Illinois; Jackson County; Carbondale; T9S, R1W, S28; 37 deg. 42.883'N, 89 deg. 13.328'W; 450 feet][South House, Plant Biology Greenhouse, Southern Illinois University; March 14, 2004; Collected by Chuck Walker; Identified by Richard Cole; #IL613]

Psilocarphus tenellus Nutt. var. tenellus slender woollyheads [US; California; Modoc County; T39N, R7E, S10; 41 deg. 13.798'N, 121 deg. 8.876'W; 4,180 feet][dirt road that dead-ends on the south-central portion of Lower Roberts Reservoir; July 7, 2004; Collected by Matt Minarchek & Chuck Walker; Identified by Michael Dolan; #CA40]

Psilostrophe cooperi (Gray) Greene whitestem paperflower [US; Arizona; Maricopa County; T9N, R2E, S27; 2,120 feet][Greyhound Park, three miles north of Black Canyon City; February 1, 1993; Collected & identified by Chuck Walker; #AZ17]

Psilostrophe sparsiflora (Gray) A.Nels. greenstem paperflower [US; Arizona; Coconino County; T42N, R5E, S33; 4,000 feet][seven miles down the Paria River Canyon from Highway 89 trailhead, thirteen miles west of Big Water, Utah; April 24, 1997; Collected & identified by Chuck Walker; #AZ444]

Pyrrhopappus carolinianus (Walt.) DC. Carolina desertchicory [US; Louisiana; Calcasieu Parish; Lake Charles; T10S, R8W, S19; 15 feet] [north side of University Dr. at its junction with Central Parkway; April 5, 2000; Collected & identified by Chuck Walker; #LA237]

Pyrrocoma hirta (Gray) Greene var. lanulosa (Greene) Mayes ex G. Brown & Keil tacky goldenweed [US; California; Lassen County; T38N, R15E, S33; 41 deg. 6.583'N, 121 deg. 16.531'W; 6,580 feet][on west side of 4WD road south of Blue Lake; August 17, 2004; Collected by Matt Minarchek & Chuck Walker; Identified by Chuck Walker; #CA102]

Ratibida columnifera (Nutt.) Woot. & Standl. upright prairie coneflower f. pulcherrima [US; Arizona; Yavapai County; Prescott; T13N, R2W, S4; 5,400 feet][east side of S. Granite St. (south of White Spar Rd.), 10 m north of creek bed; July 6, 1997; Collected & identified by Chuck Walker; #AZ458]

Ratibida columnifera (Nutt.) Woot. & Standl. upright prairie coneflower f. typical [US; Arizona; Yavapai County; Prescott; T13N, R2W, S4; 5,400 feet][east side of S. Granite St. (south of White Spar Rd.), 10 m north of creek bed; July 9, 1997; Collected & identified by Chuck Walker; #AZ460]

Ratibida pinnata (Vent.) Barnh. pinnate prairie coneflower [US; Wisconsin; Dane county; T9N, R8E, S4; 880 feet][south-facing hillside, Lodi Marsh State Wildlife Area, three miles southwest of Lodi, west side of Springfield Road; September 7, 2001; Collected & identified by Chuck Walker; #WI09]

Rudbeckia hirta var. pulcherrima Farw. blackeyed Susan [US; Iowa; Fremont County; T68N, R42W, S31; 960 feet][hillside, 5 m east of Bluff Rd., 1.4 miles south of Highway 2; July 4, 1999; Collected & identified by Chuck Walker; #IA47]

Rudbeckia laciniata L. cutleaf coneflower [US; Illinois; Calhoun County; T11S, R2W, S19; 435 feet] [dike road, Batchtown Division, Two Rivers National Wildlife Refuge; September 20, 2000; Collected by Russ Engelke, Howard Phillips & Chuck Walker; Identified by Chuck Walker; #IL89]

Sanvitalia abertii Gray Albert�s creeping zinnia [US; Arizona; Yavapai County; Prescott; T13N, R2W, S3; 5,750 feet][east side of Senator Highway, 20 m downhill from Nathan Lane; August 18, 1996; Collected & identified by Chuck Walker; #AZ374]

Senecio arizonicus Greene Arizona ragwort [US; Arizona; Yavapai County; Prescott; T13N, R2W, S21; 5,700 feet][old logging road, southwest from Schoolhouse Gulch Rd, one mile from White Spar Campgrounds; May 9, 1993; Collected & identified by Chuck Walker; #AZ83]

Senecio aronicoides DC. rayless ragwort [US; California; Modoc County; T42N, R5E, S12; 41 deg. 24.214'N, 121 deg. 20.373'W; 4,400 feet][along 4WD road, 0.1 miles west of Lava Campgrounds, Road 41N07; May 28, 2005; Collected & identified by Chuck Walker; #CA229]

Senecio flaccidus var. flaccidus Less. threadleaf groundsel [US; Arizona; Santa Cruz County; Sonoita; T20S, R17E, S16; 4,700 feet][pull-off along Highway 82, 3-4 miles east of Sonoita; May 18, 1996; Collected & identified by Chuck Walker; #AZ285]

Senecio hydrophilus (Nutt.) Nutt. water ragwort [US; Oregon; Lake County; T41S, R17E, S22; 42 deg. 5.227'N, 120 deg. 42.166'W; 5,200 feet] [along shore of Dog Lake near campgrounds; September 5, 2004; Collected & identified by Chuck Walker; #OR06]

Senecio integerrimus Nutt. lambstongue ragwort [US; California; Lassen County; T37N, R15E, S4; 41 deg. 06.375'N, 120 deg. 16.422'W; 6,575 feet] [along dirt road; June 9, 2004; Collected by Chuck Walker; Identified by Michael Dolan; #CA05]

Senecio vulgaris L. old-man-in-the-Spring [US; Washington; Spokane County; Spokane; T25N, R43E, S29; 2,260 feet] [along asphalt, northeast corner of Conservatory, Manito Park; June 15, 1998; Collected & identified by Chuck Walker; #WA46]

Silphium integrifolium Michx. wholeleaf rosinweed [US; Wisconsin; Dane county; T9N, R8E, S4; 880 feet][south-facing hillside, Lodi Marsh State Wildlife Area, three miles southwest of Lodi, west side of Springfield Road; September 7, 2001; Collected & identified by Chuck Walker; #WI10]

Silphium laciniatum L. compassplant [US; Illinois; Calhoun County; Brussels; T13S, R1W, S16; 440 feet][2 m northwest of Two Rivers National Wildlife Refuge Office; July 8, 2000; Collected & identified by Chuck Walker; #IL28]

Silphium perfoliatum L. var. perfoliatum cup plant [US; Illinois; Calhoun County; Brussels; T13S, R1W, S16; 450 feet][north side of Deer Plain Rd., 10 m east of turnoff to Two Rivers National Wildlife Refuge Office; August 19, 2000; Collected & identified by Chuck Walker; #IL59]

Silphium terebinthinaceum Jacq. prairie rosinweed [US; Illinois; Calhoun County; Brussels; T13S, R1W, S16; 440 feet][10 m west of Two Rivers National Wildlife Refuge Office; August 1, 2000; Collected & identified by Chuck Walker; #IL52]

Solidago caesia L. var. caesia wreath goldenrod [US; Illinois; Jackson County; T10S, R2W, S23; 450 feet] [along Cedar Lake Trail; September 29, 2001; Collected by Heidi Hartman; Identified by Chuck Walker; #IL94]

Solidago canadensis L. Canada goldenrod [US; Iowa; Fremont County; T68N, R42W, S32; 1,200 feet][east side of Campgrounds, 5 m north of restrooms, Waubonsie State Park; September 5, 1999; Collected & identified by Chuck Walker; #IA128]

Solidago canadensis L. var. scabra Torr. & Gray Canada goldenrod [US; Arizona; Yavapai County; T12N, R2W, S31; 7,500 feet] [Spruce Mountain heliport; July 20, 1997; Collected & identified by Chuck Walker; #AZ473]

Solidago flexicaulis L. zigzag goldenrod [US; Wisconsin; Ashland county; T45N, R2W, S15; 1,180 feet][Glen Colver farm, east side of Highway 169, one mile north of Becker Road, 4.5 miles northeast of Mellen; September 8, 2001; Collected & identified by Chuck Walker; #WI34]

Solidago gigantea Ait. giant goldenrod [US; Iowa; Fremont, Riverton; T68N, R41W, S18; 940 feet][along #2368 near first corner past the turnoff to the Riverton Check Station, Riverton Wildlife Management Area; July 30, 1999; Collected & identified by Chuck Walker; #IA84]

Solidago missouriensis Nutt. Missouri goldenrod [US; Arizona; Yavapai County; Prescott; T13N, R2W, S20; 5,760 feet][along Highway 89, near Ponderosa Subdivision Rd, south of Prescott; August 14, 1992; Collected & identified by Chuck Walker; #AZ05]

Solidago nemoralis Ait. gray goldenrod [US; Wisconsin; Columbia County; Portage; T11N, R9E, S4; 780 feet][dry sandy paririe, South Knoll (Berry Hill), Columbia Energy Center, three miles south of Portage, 0.5 miles west of Highway 51; September 26, 1975; Collected & identified by Dr. Beth Middleton; #261]

Solidago rugosa ssp. aspera (Ait.) Cronq. wrinkleleaf goldenrod [US; Illinois; Jersey County; Grafton; T6N, R13W, S18; 450 feet][north side of Highway 100, 3.5 miles east of Grafton; October 17, 2000; Collected & identified by Chuck Walker; #IL98]

Solidago rupestris Raf. rock goldenrod [US; Pennsylvania; Erie County; Erie; 590 feet] [north side of Bayfront Highway, near the Public Dock; September 13, 1998; Collected & identified by Chuck Walker; #PA20]

Solidago speciosa Nutt. showy goldenrod [US; Iowa; Fremont County; T68N, R42W, S32; 1,200 feet] [beginning of trail through prairie at the end of loop in upper picnic area, Waubonsie State Park; September 2, 1999; Collected & identified by Chuck Walker; #IA125]

Solidago ulmifolia Muhl. ex Willd. elmleaf goldenrod [US; Illinois; Monroe County; Fults; T4S, R10W, S27; 38 deg. 9.469'N, 90 deg. 11.393'W; 600 feet][along trail on edge of limestone glade, Fults Hill Prairie Nature Preserve; July 22, 2002; Collected by Chuck Walker; Identified by Dr. Mark A. Basinger; #IL404]

Solidago ulmifolia Muhl. ex Willd. elmleaf goldenrod [US; Arkansas; Montgomery County; T4S, R27W, S27; 34 deg. 22.61'N, 93 deg. 52.67'W; 950 feet] [on south-facing hill overlooking the Little Missouri River, Area C, Albert Pike Recreation Area, Ouachita National Forest; September 3, 2006; Collected & identified by Chuck Walker; #AR41]

Solidago wrightii Gray Wright�s goldenrod [US; Arizona; Yavapai County; T16N, R6W, S22; 5,360 feet][Cottonwood Canyon, off Camp Wood Rd., six miles from Williamson Valley Rd., 22 miles from Prescott; September 17, 1995; Collected & identified by Chuck Walker; #AZ234]

Sonchus asper (L.) Hill spiny sowthistle [US; Louisiana; Calcasieu Parish, Lake Charles; T10S, R8W, S20; 15 feet][behind apartment building at 4030 Auburn St.; March 11, 2000; Collected & identified by Chuck Walker; #LA222]

Sonchus asper (L.) Hill spiny sowthistle [US; Mississippi; Sharkey County; T13N, R5W, S21; 32 deg. 57.830'N, 90 deg. 43.900'W; 95 feet] [Interior levee between cells 3 & 4, Flooding Research Facility, six miles east-south-east of Anguilla, April 6, 2006; Collected & identified by Chuck Walker; #MS48]

Sonchus oleraceus L. common sowthistle [US; Iowa; Fremont County; T68N, R42W, S29; 1,150 feet][by entranceway to Equestrian Area, Waubonsie State Park; July 10, 1999; Collected & identified by Chuck Walker; #IA59]

Stephanomeria minor (Hook.) Nutt. var. minor narrowleaf wirelettuce [US; Arizona; Yavapai County; T13N, R1W, S5; 5,560 feet][10 m southeast of Lynx Creek Ruin Trailhead (#301), along Lynx Creek Trail Rd., 220 m from Walker Rd; June 17, 1995; Collected & identified by Chuck Walker; #AZ172]

Stephanomeria paniculata Nutt. tufted wirelettuce [US; Idaho; Bonner County; T60N, R4W, S14; 2,574 feet][along dirt road leading west from Luby Bay Campgrounds, Priest Lake; July 25, 1998; Collected & identified by Chuck Walker; #ID15]

Stephanomeria pauciflora (Torr.) A. Nels. brownplume wirelettuce [US; Arizona; Pima County; Ajo; T12S, R6W, S15; 1,800 feet][along State Route 85 at 1st St.; March 26, 1997; Collected & identified by Chuck Walker; #AZ424]

Symphyotrichum ascendens (Lindl.) Nesom western aster [US; California; Modoc County, Alturas; T43N, R12E, S25; 41 deg. 32.104'N, 120 deg. 32.482'W; 4,460 feet][along west side of Road #271, in floodplain of stream from Mud Lake Reservoir; August 8, 2004; Collected & identified by Chuck Walker; #CA98]

Symphyotrichum cordifolium (L.) Nesom common blue wood aster [US; Illinois; Calhoun County; T11S, R2W, S10; 440 feet][base of hill, 20 m northwest of Illinois River Rd.-Salt Spring Hollow Rd. (Lead Hollow); October 20, 2000; Collected & identified by Chuck Walker; #IL100]

Symphyotrichum divaricatum (Nutt.) Nesom southern annual saltmarsh aster [US; Mississippi; Washington County; Leland; T18N, R7W, S15; 33 deg. 24.643'N, 90 deg. 54.618'W; 125 feet][along Deer Creek (S. Deer Creek Drive) near Stoneville-Leland municipal line; October 10, 2005; Collected by Chuck Walker; Identified by Danny Skojac & Chuck Walker; #MS17]

Symphyotrichum ericoides (L.) Nesom var. ericoides white heath aster [US; Iowa; Fremont County; T68N, R42W, S32; 1,200 feet][lower end of campgrounds on west side of the loop, Waubonsie State Park; September 5, 1999; Collected & identified by Chuck Walker; #IA129]

Symphyotrichum frondosum (Nutt.) Nesom short-rayed alkalai aster [US; Oregon; Lake County; T41S, R20E, S23; 41 deg. 59.617'N, 120 deg. 19.758'W; 4,720 feet][along shore of Goose Lake, Goose Lake State Recreation Area; September 4, 2004; Collected & identified by Chuck Walker; #OR03]

Symphyotrichum lateriflorum (L.) A.& D. L�ve calico aster [US; Wisconsin; Ashland County; T45N, R2W, S15; 1,180 feet][Glen Colver farm, east side of Highway 169, one mile north of Becker Road, 4.5 miles northeast of Mellen; September 8, 2001; Collected by Jiff Thomas & Renuka Sankaran; Identified by Chuck Walker; #WI35]

Symphyotrichum novae-angliae (L.) Nesom New England aster [US; Wisconsin; Dane County; T9N, R8E, S4; 880 feet][fen, Lodi Marsh State Wildlife Area, three miles southwest of Lodi, west side of Springfield Road; September 7, 2001; Collected & identified by Chuck Walker; #WI11]

Symphyotrichum oblongifolium (Nutt.) Nesom aromatic aster [US; Illinois; Jersey County; Grafton; T6N, R11W, S18; 450 feet][north side of Highway 100, three miles east of Grafton; October 17, 2000; Collected & identified by Chuck Walker; #IL99]

Symphyotrichum ontarione (Wieg.) Nesom bottomland aster [US; Mississippi; Sharkey County; T13N, R5W, S17; 32 deg. 57.931'N, 90 deg. 44.000'W; 95 feet][along north side of Theobald Rd., six miles east-south-east of Anguilla; October 19, 2005; Collected by Chuck Walker; Identified by Danny Skojac & Chuck Walker; #MS20]

Symphyotrichum oolentangiense (Riddell) Nesom var. oolentangiense skyblue aster [US; Illinois; Monroe County; Fults; T4S, R10W, S27; 38 deg. 9.465'N, 90 deg. 11.389'W; 600 feet][along trail on edge of limestone glade, Fults Hill Prairie Nature Preserve; July 22, 2002; Collected by Chuck Walker; Identified by Dr. Mark A. Basinger; #IL406]

Symphyotrichum patens (Ait.) Nesom late purple aster [US; Illinois; Monroe County; Fults; T4S, R10W, S27; 38 deg. 9.465'N, 90 deg. 11.389'W; 600 feet][along trail on edge of limestone glade, Fults Hill Prairie Nature Preserve; July 22, 2002; Collected by Chuck Walker; Identified by Dr. Mark A. Basinger; #IL407]

Symphyotrichum phlogifolium (Muhl. ex Willd.) Nesom thinleaf late purple aster [US; Pennsylvania; Erie County; Erie; 590 feet][south side of the Bayfront Highway near the Public Dock; September 13, 1998; Collected & identified by Chuck Walker; #PA21]

Symphyotrichum pilosum (Willd.) Nesom hairy white oldfield aster[US; Wisconsin; Ashland county; T45N, R2W, S15; 1,180 feet][Glen Colver farm, east side of Highway 169, one mile north of Becker Road, 4.5 miles northeast of Mellen; September 8, 2001; Collected & identified by Chuck Walker; #WI36]

Symphyotrichum sericeum (Vent.) Nesom western silver aster [US; Illinois; Monroe County; Fults; T4S, R10W, S27; 38 deg. 9.469'N, 90 deg. 11.393'W; 600 feet][along trail on edge of limestone glade, Fults Hill Prairie Nature Preserve; July 22, 2002; Collected by Chuck Walker; Identified by Dr. Mark A. Basinger; #IL408]

Symphyotrichum subulatum (Michx.) Nesom eastern annual saltmarsh aster [US; Illinois; Jackson County; Carbondale; T9S, R1W, S20; 410 feet][Green Earth Wetland; September 27, 2001; Collected Heidi Hartman; Identified by Chuck Walker; #IL255]

Tagetes minuta L. muster John Henry [US; Iowa; Fremont County; T68N, R42W, S29; 1,200 feet][entranceway to Mincer Orchard, along entranceway to Waubonsie State Park; September 6, 1999; Collected & identified by Chuck Walker; #IA135]

Tanacetum parthenium (L.) Schultz-Bip feverfew [US; Washington; Spokane County; Spokane; T25N, R43E, S28; 2,300 feet][north-facing slope along asphalt roadway through Lincoln Park; August 2, 1998; Collected & identified by Chuck Walker; #WA96]

Taraxacum officinale G.H. Weber ex Wiggers common dandelion [US; Iowa; Fremont County; Riverton; T68N, R41W, S18; 940 feet][south side of #313, 20 m downhill from the Observation deck, Riverton Wildlife Management Area; August 5, 1999; Collected & identified by Chuck Walker; #IA90]

Thymophylla acerosa (DC.) Strother prickleleaf dogweed [US; Arizona; Yavapai County; Prescott; T14N, R2W, S13; 5,190 feet][steep embankment by roadside stop on the west side of Watson Lake on Highway 89; May 28, 1995; Collected & identified by Chuck Walker; #AZ150]

Townsendia mexicana A.Gray Mexican Townsend-daisy [Mexico; Hidalgo][near limestone canyon, seven miles south of Ixmiquilpan; December 17, 1958; Collected by George Neville Jones; Determined by B. L. Turner; #37425]

Tragopogon dubius Scop. yellow salsify [US; Arizona; Yavapai County; Prescott; T13N, R2W, S4; 5,410 feet][west side of 500 block of S. Montezuma St.; May 6, 1993; Collected & identified by Chuck Walker; #AZ79]

Tragopogon porrifolius L. purple salsify [US; Arizona; Yavapai County; Prescott; T13N, R2W, S4; 5,410 feet][west side of 500 block of S. Montezuma St.; May 6, 1993; Collected & identified by Chuck Walker; #AZ80]

Tridax procumbens L. coatbuttons [US; Florida; Broward County; Fort Lauderdale; T50S, R42E, S10; 5 feet][along Florida East Coast Railroad tracks, 20 m south of New River, downtown Fort Lauderdale; January 5, 1998; Collected & identified by Chuck Walker; #FL62]

Verbesina alternifolia (L.) Britt. ex Kearney wingstem [US; Illinois; Jackson County; Carbondale; T9S, R1W, S4; 420 feet] [west side of Springer Ridge Rd., in low flat area north of Bosky Dell; August 12,2001; Collected & identified by Chuck Walker; #IL240]

Verbesina alternifolia (L.) Britt. ex Kearney wingstem [US; Missouri; Carter County; T27N, R1E, S32; 36 deg. 57.741'N, 90 deg. 58.963'W; 460 feet] [Big Springs State Park Campgrounds, Ozark National Scenic Riverways, three miles southeast of Van Buren; September 10, 2007; Collected & identified by Chuck Walker; #MO19]

Verbesina helianthoides Michx. gravelweed [US; Illinois; Jackson County; Carbondale; T9S, R1W, S28; 420 feet][west side of Illinois Central Gulf Railroad tracks, 30 m north of Pleasant Hill Rd.; June 6, 2001; Collected & identified by Chuck Walker; #IL162]

Verbesina virginica L. var. virginica white crownbeard [US; Missouri; Carter County; T27N, R1E, S32; 36 deg. 57.741'N, 90 deg. 58.963'W; 460 feet] [Big Springs State Park Campgrounds, Ozark National Scenic Riverways, three miles southeast of Van Buren; September 10, 2007; Collected & identified by Chuck Walker; #MO20]

Vernonia fasciculata Michx. ssp. fasciculata prairie ironweed [US; Illinois; Calhoun County; T11S, R2W, S31; 440 feet][north side of road, 10 m outside (east) the gate to Batchtown Division, Two Rivers National Wildlife Refuge; July 31, 2000; Collected & identified by Chuck Walker; #IL50]

Vernonia gigantea (Walt.) Trel. giant ironweed [US; Missouri; Mississippi County; Anniston; T25N, R16E, S10; 36 deg. 49.172'N, 89 deg. 18.468'W; 325 feet] [2 m north of Road DD, 5 m west of Birds Point New Madrid Levee, one mile southeast of Anniston; September 14, 2002; Collected & identified by Chuck Walker; #MO06]

Vernonia missurica Raf. Missouri ironweed [US; Illinois; Jackson County; Carbondale; T9S, R1W, S33; 450 feet][along the west side of Springer Ridge Rd., 40 m south of Pleasant Hill Rd.; August 6, 2001; Collected & identified by Chuck Walker; #IL234]

Xanthium strumarium var. canadense (P.Mill.) Torr. & Gray Canada cockleburr [US; Arizona; Yavapai County; Chino Valley; T17N, R1W, S7; 4,180 feet][along Verde River, 1.5 miles downstream from its confluence with Granite Creek; August 23, 1996; Collected & identified by Chuck Walker; #AZ379]

Youngia japonica (L.) DC. oriental false hawksbeard [US; Louisiana; Calcasieu Parish; Lake Charles; T10S, R8W, S20; 15 feet][vacant lot south of 4325 Common St.; January 23, 2000; Collected & identified by Chuck Walker; #LA207]

Zinnia grandiflora Nutt. Rocky Mountain zinnia [US; Arizona; Yavapai County; Chino Valley; T16N, R2W, S34; 4,840 feet][north side of Outer Loop Rd., 50 m west of Highway 89; July 21, 1996; Collected & identified by Chuck Walker; #AZ340]