ASTERACEAE A through G

Achillea millefolium L. var. occidentalis DC. western yarrow [US; Arizona; Yavapai County; Prescott; T13N, R2W, S9; 5,600 feet][west-facing slope leading down to Haisley Homestead; June 30, 1993; Collected & identified by Chuck Walker; #AZ128]

Acmella oppositifolia (Lam.) R.K. Jansen var. repens (Walt.) R.K. Jansen oppositeleaf spotflower [US; Mississippi; Washington County; T19N, R7W, S26; 33 deg. 27.981'N, 90 deg. 53.998'W; 120 feet][along north side of road in Delta Experimental Forest, about three miles north of Stoneville; September 24, 2005; Collected by Chuck Walker; Identified by Danny Skojac; #MS01]

Ageratina adenophora (Spreng.) King & H.E. Robins. sticky snakeroot [US; California; Lassen County; T37N, R13E, S13; 41 deg. 2.166'N, 120 deg. 25.871'W; 5,700 feet][on rock ledge on north-facing slope, 0.2 miles south of Clarks Valley Road; July 14, 2005; Collected by Lisa Anderson & Chuck Walker; Identified by Mike Dolan & Chuck Walker; #CA283]

Ageratina altissima (L.) King & H.E. Robins. var. altissima white snakeroot [US; Iowa; Fremont County; T68N, R42W, S29; 1,210 feet][along #239, 80 m outside Waubonsie State Park gate; July 23, 1999; Collected & identified by Chuck Walker; #IA70]

Ageratina occidentalis (Hook.) King & H.E. Robins. western snakeroot [US; California; Lassen County; T37N, R13E, S13; 41 deg. 2.160'N, 120 deg. 25.876'W; 5,700 feet][on rock ledge on north-facing slope, 0.2 miles south of Clarks Valley Road; July 14, 2005; Collected by Lisa Anderson & Chuck Walker; Identified by Mike Dolan & Chuck Walker; #CA284]

Ageratum houstonianum P. Mill. 'blue lagoon' bluemink [Origin: Mexico, Belize, and Guatemala] [US; Illinois; Jackson County; Carbondale; T9S, R1W, S28; 37 deg. 42.883'N, 89 deg. 13.328'W; 450 feet][North House, Plant Biology Greenhouse, Southern Illinois University; April 25, 2004; Collected by Chuck Walker; Identified by Richard Cole; #IL636]

Agoseris retrorsa (Benth.) Greene spearleaf agoseris [US; California; Lassen County; T39N, R15E, S32; 41 deg. 10.380�N, 120 deg. 17.220'W; 5,900 feet][along west side of Coyote Loop road, near Harvey Creek; July 16, 2005; Collected by Chuck Walker; Identified by Chuck Walker & Michael Nolan; #CA290]

Almutaster pauciflorus (Nutt.) A. & D. L�ve alkali marsh aster [US; Arizona; Yavapai County; Chino Valley; T17N, R2W, S11; 4,210 feet] [north bank of Verde River, 1/2 mile downstream from its convergence with Granite Creek; August 9, 1996; Collected & identified by Chuck Walker; #AZ351]

Ambrosia acanthicarpa Hook. flatspine burr ragweed [US; Iowa; Fremont County; T68N, R42W, S29; 1,250 feet][along edge of the main Observation Point, Waubonsie State Park; August 28, 1999; Collected & identified by Chuck Walker; #IA113]

Ambrosia ambrosioides (Cav.) Payne ambrosia leaf burr ragweed [US; Arizona; Pima County; Ajo; T12S, R6W, S5; 1,772 feet][North St. & State Route 85; March 25, 1997; Collected & identified by Chuck Walker; #AZ414]

Ambrosia dumosa (Gray) Payne burrobush [US; Arizona; Pinal County; T12S, R6W, S5; 1,772 feet][west side of I-10 by mile marker #172; May 18, 1996; Collected by Chuck Walker; Identified by Dr. Archie Dickey; #AZ278]

Ambrosia psilostachya DC. Cuman ragweed [US; Arizona; Yavapai County; Prescott; T13N, R2W, S4; 5,400 feet][east side of S. Montezuma St., nears its junction with White Spar Rd; August 7, 1995; Collected & identified by Chuck Walker; #AZ215]

Ambrosia trifida L. great ragweed [US; Louisiana; Calcasieu Parish, Lake Charles; T10S, R8W, S19; 15 feet] [northwest side of the footbridge, McNeese State University; October 7, 1994; Collected & identified by Chuck Walker; #LA167]

Ampelaster carolinianus (Walt.) Nesom climbing aster [US; Florida; Broward County; T50S, R31E, S1; 5 feet][800 m west of mile marker #34, where Highway 75 goes over channeled water of the Everglades; January 6, 1998; Collected & identified by Chuck Walker; #FL63]

Anaphalis margaritacea (L.) Benth. western pearly everlasting [US; Idaho; Bonner County; T60N, R4W, S14; 2,574 feet][along dirt road, 400 m west of Luby Bay Campgrounds; July 25, 1998; Collected & identified by Chuck Walker; #ID08]

Antennaria luzuloides Torr. & Gray rush pussytoes [US; California; Modoc County; T40N, R11E, S13; 41 deg. 17.936'N, 120 deg. 39.325'W; 5,500 feet][in association with Juniperus occidentalis, Artemesia, Purshia tridentata, 0.5 miles west-south-west of Higgins Spring, Graven Ridge; June 22, 2005; Collected by Chuck Walker; Identified by Chuck Walker & Michael Nolan; #CA254]

Antennaria parlinii Fern. ssp. fallax (Greene) Bayer & Stebbins Parlin's pussytoes [US; Arkansas; Pope County; 35 deg. 30.694'N, 93 deg. 1.094'W; T10N, R19W, S16; 840 feet][north side of N Fork Road (NF 1310), one mile west of Adams Mountain Road (NF 1328); March 31, 2007; Collected & identified by Chuck Walker & Danny Skojac; #AR60]

Antennaria plantaginifolia (L.) Richards. woman�s tobacco [US; Minnesota; Itasca County; Swan River; T53N, R22W, S31; 1,250 feet][along County Rd. #428, 4.5 miles south of Highway 2 (Swan River Post Office); June 1, 1997; Collected & identified by Chuck Walker; #MN08]

Antennaria rosea Greene ssp. confinis (Greene) Bayer rosy pussytoes [US; California; Modoc County; T36N, R11E, S9; 40 deg. 58.475'N, 120 deg. 43.088'W; 6,340 feet][along four wheel drive road, South Knob allotment; July 14, 2004; Collected by Matt Minarchek & Chuck Walker; Identified by Chuck Walker; #CA47]

Anthemis arvensis L. corn chamomile [US; Illinois; Jackson County; Carbondale; T9S, R1W, S29; 410 feet][between west & east forks of the Little Crab Orchard Creek, south side of Chautaqua Rd; May 28, 2001; Collected & identified by Chuck Walker; #IL146]

Arctium minus Bernh. lesser burrdock [US; Pennsylvania; Erie County; Erie; 600 feet][hillside above Bayfront Highway, north end of Sassafras St.; September 12, 1998; Collected & identified by Chuck Walker; #PA01]

Arnica cordifolia Hook. heartleaf arnica [US; Colorado; Jefferson County; Genessee; T4S, R71N, S13; 39 deg. 42.415'N, 105 deg. 17.633'W; 7,840 feet][20 m southeast of Genesee Country Store; June 4, 2004; Collected & identified by Chuck Walker; #CO02]

Arnoglossum atriplicifolium (L.) H. E. Robins. pale Indian plantain [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; #WI01]

Arnoglossum ovatum (Walt.) H.E. Robins. ovateleaf cacalia [US; Louisiana; Calcasieu Parish; Lake Charles; T10S, R8W, S29; 15 feet][vacant lot, north side of Tallow Rd, 100 m from its eastern end; July 20, 1994; Collected & identified by Chuck Walker; #LA130]

Artemisia absinthium L. absinthium [US; Washington; Spokane County; Spokane; T25N, R43W, S29; 2,240 feet][along road beneath stone bridge, Manito Park; August 10, 1998; Collected & identified by Chuck Walker; #WA101]

Artemisia annua L. sweet sagewort [US; Illinois; Calhoun County; T12S, R1W, S7; 425 feet][boat launch, Fuller Lake, Hadley Landing; September 21, 2000; Collected & identified by Chuck Walker; #IL90]

Artemisia camphorata Vill. camphor wormwood [US; Missouri; Saint Louis County; Saint Louis; 38 deg. 36.8'N, 90 deg. 15.55'W; 500 feet][Missouri Botanical Garden; November 16, 2003; Collected & identified by Chuck Walker; #MO07]

Artemisia carruthii Wood ex Carruth. Carruth�s sagewort [US; Arizona; Coconino County; T22N, R6E, S24; 7,400 feet][20 m southeast of Snowbowl Rd-164B Junction, 800 m from Highway 180; July 26, 1997; Collected & identified by Chuck Walker; #AZ476]

Artemisia douglasiana Bess. Douglas' sagewort [US; California; Modoc County, Alturas; T43N, R14E, S14; 41 deg. 33.654'N, 120 deg. 19.323'W; 5,480 feet][along south side of Highway #299, about 1.5 miles west of Cedar Pass; August 21, 2004; Collected & identified by Chuck Walker; #CA104]

Artemisia ludoviciana Nutt. ssp. ludoviciana white sagebrush [US; California; Modoc County, Alturas; T43N, R12E, S25; 41 deg. 32.103'N, 120 deg. 32.464'W; 4,460 feet][along east side of Road #271, near stream from Mud Lake Reservoir; August 8, 2004; Collected & identified by Chuck Walker; #CA96]

Artemisia tridentata Nutt. ssp. tridentata basin big sagebrush [US; California; Lassen county; T36N, R9E, S12; 40 deg. 57.935'N, 120 deg. 53.077'W; 5,840 feet][Summer's Hill; July 20, 2004; Collected by Matt Minarchek & Chuck Walker; Identified by Chuck Walker; #CA65]

Artemisia tridentata Nutt. ssp. vaseyana (Rydb.) Beetle mountain big sagebrush [US; California; Modoc County; T43N, R15E, S16; 41 deg. 35.287'N, 120 deg. 16.393'W; 8,100 feet][northeast slope of Cedar Mountain; August 28, 2004; Collected & identified by Chuck Walker; #CA117]

Baccharis halimifolia L. eastern baccharis [US; Mississippi; Washington County; T15N, R7W, S8; 33 deg. 10.125'N, 90 deg. 56.098'W; 105 feet][west side of Alligator Pond, Leroy Percy State Park; November 6, 2005; Collected & identified by Chuck Walker; #MS21]

Baccharis pteronioides DC yerba de pasmo [US; Arizona; Yavapai County; Prescott; T14N, R2W, S34; 5,400 feet][south side of Highway 69, by Memorial Cemetery; June 29, 1995; Collected & identified by Chuck Walker; #AZ183]

Baccharis salicifolia (Ruiz & Pav�n) Pers. mule�s fat [US; Arizona; Yavapai County, Paulden; T17N, R1W, S5; 4,130 feet][2.5 miles downstream from Granite Creek-Verde River confluence; August 24, 1996; Collected & identified by Chuck Walker; #AZ381]

Baccharis sarothroides Gray desertbroom [US; Arizona; Gila County; T1N, R10E, S20; 3,080 feet][wash in Barks Canyon, 1-2 miles north of Paralta trailhead, Superstition Wilderness Area; February 24, 1996; Collected & identified by Chuck Walker; #AZ246]

Baileya multiradiata Harvey & Gray ex Gray desert marigold [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; #AZ14]

Balsamorhiza hookeri (Hook.) Nutt. var. neglecta (Sharp) Cronq. neglected balsamroot [US; California; Lassen County; T36N, R14E, S21; 40 deg. 58.15'N, 120 deg. 23.65'W; 6,280 feet][sagebrush area, Skeleton Flat; May 31, 2005; Collected by Wes Barry & Chuck Walker; Identified by Mike Dolan; #CA234]

Balsamorhiza sagittata (Pursh.) Nutt. arrowleaf balsamroot [US; Idaho; Kootenai County; Coeur d'Alene; T25N, R43E, S28; 2,140 feet][Tubbs Hill; April 10, 1998; Collected by Melissa Bressler & Chuck Walker; Identified by Chuck Walker; #ID02]

Bidens aristosa (Michx.) Britt. bearded beggarticks [US; Illinois; Calhoun County; Brussels; T13S, R1W, S16; 440 feet][50 m south of turnoff to Two Rivers National Wildlife Refuge; August 26, 2000; Collected & identified by Chuck Walker; #IL66]

Bidens bipinnata L. Spanish needles [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; #IA127]

Bidens cernua L. nodding beggartick [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; #WI02]

Bidens connata Muhl. ex Willd. purplestem beggarticks [US; Illinois; Calhoun County; Brussels; T13S, R1W, S16; 420 feet][northeast corner of Upper Calhoun Moist Soil Unit (#5), Two Rivers National Wildlife Refuge; September 11, 2000; Collected & identified by Chuck Walker; #IL80]

Bidens coronata (L.) Britt. crowned beggarticks [US; Illinois; Jackson County; Carbondale; T9S, R1W, S20; 410 feet] [Green Earth Wetland; September 4, 2001; Collected by Heidi Hartman; Identified by Chuck Walker; #IL250]

Bidens frondosa L. devil�s beggartick [US; Illinois; Calhoun County; Brussels; T13S, R1W, S16; 440 feet][40 m northeast of Two Rivers National Wildlife Refuge Office; September 4, 2000; Collected & identified by Chuck Walker; #IL76]

Bidens laevis (L.) B.S.P. smooth beggartick [US; Illinois; Calhoun County; Brussels; T12S, R1W, S19; 425 feet][along inlet of Middle Swan Lake leading to pump station; October 2, 2000; Collected & identified by Chuck Walker; #IL95]

Bidens laevis (L.) Britton, Sterns & Poggenb. smooth beggartick [US; Louisiana; St Bernard Parish; Caernarvon; T14S, R13E, S15?; 29 deg. 51.652'N, 89 deg. 54.083'W; 5 feet][St Bernard State Park; November 23, 2007; Collected & identified by Chuck Walker; #LA280]

Bidens mitis (Michx.) Sherff smallfruit beggarticks [US; Arkansas; Drew County; Collins; T14S, R4W, S32; 33 deg. 26.87'N, 91 deg. 32.50'W; 120 feet][along shore of Cut-Off Creek, east of boat launch, Camping Area 1, Cut-Off Creek Wildlife Management Area; May 28, 2006; Collected & identified by Chuck Walker; #AR31]

Bidens pilosa L. hairy beggarticks [US; Florida; Broward County; Fort Lauderdale; T50S, R42E, S10; 5 feet][south side of 900 block of W. Broward; January 9, 1998; Collected & identified by Chuck Walker; #FL75]

Bidens vulgata Greene big devil�s beggartick [US; Illinois; Calhoun County; Brussels; T12S, R1W, S19; 425 feet][east side of refuge road (dike), 0.2 miles south-south-east of Pump Station at Middle Swan Lake, Two Rivers National Wildlife Refuge; August 23, 2000; Collected & identified by Chuck Walker; #IL62]

Blepharipappus scaber Hook. rough eyelashweed [US; Oregon; Lake County; T41S, R17E, S22; 42 deg. 5.227'N, 120 deg. 42.5.293'W; 5,260 feet][along road leading into campground, Dog Lake; September 5, 2004; Collected & identified by Chuck Walker; #OR04]

Brickellia betonicifolia Gray betonyleaf brickellbush [US; Arizona; Yavapai County; T16N, R6W, S22; 5,360 feet][Cottonwood Canyon, six miles from Williamson Valley Rd; September 17, 1995; Collected & identified by Chuck Walker; #AZ222]

Brickellia eupatorioides (L.) Shinners var. corymbulosa (Torr. & Gray) Shinners false boneset [US; Iowa; Fremont County; T68N, R42W, S29; 1,250 feet][along Ridge trail, 400 m from the Main Observation Point, Waubonsie State Park; August 29, 1999; Collected & identified by Chuck Walker; #IA118]

Brickellia floribunda Gray Chihuahuan brickellbush [US; Arizona; Yavapai County; T16N, R6W, S22; 5,360 feet][Cottonwood Canyon, six miles from Williamson Valley Rd.; September 17, 1995; Collected & identified by Chuck Walker; #AZ223]

Brickellia grandiflora (Hook.) Nutt. tasselflower brickellbush [US; Arizona; Yavapai County; T16N, R6W, S22; 5,360 feet][Cottonwood Canyon, six miles from Williamson Valley Rd.; September 17, 1995; Collected & identified by Chuck Walker; #AZ224]

Calyptocarpus vialis Less. straggler daisy [US; Louisiana; Calcasieu Parish; Lake Charles; T10S, R9W, S12; 15 feet][along Minton Dr. (runs parallel & south of Giovannia St.); March 24, 2000; Collected & identified by Chuck Walker; #LA223]

Carduus nutans L. nodding plumeless thistle [US; Illinois; Calhoun County; Brussels; T13S, R1W, S15; 425 feet][north side of Illinois River Rd, 10 m east of turnoff to Schoolhouse & Calhoun Moist Soil Unit, Two Rivers National Wildlife Refuge; July 19, 2000; Collected & identified by Chuck Walker; #IL36]

Centaurea biebersteinii DC. spotted knapweed [US; Arizona; Yavapai County; T13N, R3W, S23; 6,920 feet][by radio facility, 1/4 mile southeast of Mount Francis; July 15, 1995; Collected & identified by Chuck Walker; #AZ198]

Centaurea cyanus L. garden cornflower [US; Arizona; Yavapai County; Prescott; T13N, R2W, S4; 5,400 feet][south side of Walker St., 10 m east of S. Montezuma St.; July 16, 1995; Collected & identified by Chuck Walker; #AZ203]

Centaurea diffusa Lam. white knapweed [US; Washington; Spokane County; Medical Lake; T24N, R41E, S18; 2,425 feet][southwest corner of Medical Lake High School; August 8, 1998; Collected & identified by Chuck Walker; #WA99]

Centaurea jacea L. brownray knapweed [US; Washington; Spokane County; Spokane; T25N, R43E, S28; 2,300 feet][north-facing slope along asphalt road in Lincoln Park; August 2, 1998; Collected & identified by Chuck Walker; #WA95]

Centaurea scabiosa L. greater knapweed [US; Pennsylvania; Erie County; Erie; 600 feet][hillside above Bayfront Highway, north end of Sassafras St.; September 12, 1998; Collected & identified by Chuck Walker; #PA02]

Centaurea solstitialis L. yellow star-thistle [US; California; Modoc County; T45N, R16E, S5; 41 deg. 47.950'N, 120 deg. 10.368'W; 4,540 feet][along north side of dirt road leading to corral, Carey Ranch, north of Road/Highway 1-9 intersection, Surprise Valley; July 8, 2004; Collected by Matt Minarchek & Chuck Walker; Identified by Mike Dolan; #CA41]

Chaenactis douglasii (Hook.) Hook. & Arn. var. douglasii Douglas' dustymaiden [US; California; Lassen county; T36N, R9E, S21; 40 deg. 56.457'N, 120 deg. 56.813'W; 5,414 feet][Bald ridges; July 20, 2004; Collected by Matt Minarchek & Chuck Walker; Identified by Chuck Walker; #CA67]

Chaenactis stevioides Hook. & Arn. Steve�s dustymaiden [US; Arizona; Maricopa County; T1N, R4W, S14; 1,050 feet][within cloverleaf of State Route 85 & I-10; March 27, 1997; Collected & identified by Chuck Walker; #AZ425]

Chrysanthemum frutescens L. marguerite [Origin: Canary Islands] [US; Illinois; Jackson County; Carbondale; T9S, R1W, S28; 37 deg. 42.883'N, 89 deg. 13.328'W; 450 feet][North House, Plant Biology Greenhouse, Southern Illinois University; April 25, 2004; Collected by Chuck Walker; Identified by Richard Cole; #IL637]

Chrysoma pauciflosculosa (Michx.) Greene woody goldenrod [US; Florida; Okaloosa County; Niceville; T1S, R22W, S15; 30 deg. 29.846'N, 86 deg. 26.017'W; 25 feet][along Red Cedar Trail, Fred Gannon Rocky Bayou State Park; November 11, 2008; Collected & identified by Chuck Walker; #FL94]

Chrysopsis mariana (L.) Ell. Maryland goldenaster [US; Georgia; Catoosa County, Ringgold; 34 deg. 58.019'N, 85 deg. 11.305'W; 820 feet][on the north side of Pine Grove Access Road, less than 0.1 miles from I-75; December 21, 2002; Collected & identified by Chuck Walker; #GA01]

Chrysothamnus viscidiflorus (Hook.) Nutt. ssp viscidiflorus yellow rabbitbrush [US; California; Lassen county; T36N, R9E, S12; 40 deg. 57.978'N, 120 deg. 53.102'W; 5,840 feet][Summer's Hill; July 20, 2004; Collected by Matt Minarchek & Chuck Walker; Identified by Chuck Walker; #CA68]

Cichorium intybus L. chicory [US; Pennsylvania; Erie County; Erie; 570 feet][south side of Bayfront Highway, near the Public Dock; September 13, 1998; Collected & identified by Chuck Walker; #PA07]

Cirsium arizonicum (Gray) Petrak Arizona thistle [US; Arizona; Yavapai County; Prescott; T13N, R2W, S9; 5,600 feet][White Spar Road by Prescott Pines Mobile Home Resort; June 2, 1993; Collected & identified by Chuck Walker; #AZ99]

Cirsium arvense (L.) Scop. Canada thistle [US; California; Modoc County; T46N, R16E, S13][ditch along roadside by Fee Ranch; July 8, 2004; Collected by Matt Minarchek & Chuck Walker; Identified by Mike Dolan; #CA42]

Cirsium cymosum (Greene) J.T. Howell peregrine thistle [US; California; Modoc County; T40N, R12E, S3; 41 deg. 25.589'N, 120 deg. 36.967'W; 5,000 feet][pond edge, Westside allotment; June 28, 2004; Collected by Matt Minarchek & Chuck Walker; Identified by Chuck Walker; #CA25]

Cirsium hillii (Canby) Fern. Hill's thistle [US; Illinois; Calhoun County; Brussels; T13S, R1W, S14; feet][west side of road, north fork of Pohlman Slough, Two Rivers National Wildlife Refuge; July 19, 2000; Collected & identified by Chuck Walker; #IL37]

Cirsium horridulum Michx. yellow thistle [US; Louisiana; Calcasieu Parish, Lake Charles; T10S, R8W, S19; 15 feet][east bank of Contraband Bayou, 5 m north of E. Parkway-Gulf Highway (385) intersection; April 15, 2000; Collected by Chuck Walker; Identified by Ray Neyland; #LA245]

Cirsium muticum Michx. swamp thistle [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; #WI03]

Cirsium ochrocentrum Gray yellowspine thistle [US; California; Modoc County; T42N, R13E, S6; 41 deg. 30.577'N, 120 deg. 31.137'W; 4,440 feet][pasture, on east side of Pencil Road, northeast Alturas; July 8, 2004; Collected by Matt Minarchek & Chuck Walker; Identified by Mike Dolan; #CA43]

Cirsium pastoris J.T. Howell snowy thistle [US; California; Lassen County; T36N, R7E, S35; 40 deg. 54.879'N, 121 deg. 8.28'W; 4,720 feet] [along east side of dirt road, about three miles northeast of Little Valley; September 8, 2004; Collected & identified by Chuck Walker; #CA125]

Cirsium vulgare (Savi) Ten. bull thistle [US; Arizona; Yavapai County; Prescott; T14N, R2W, S34; 5,250 feet][along old bed of AT & SF tracks, north of Fort Whipple; July 12, 1993; Collected & identified by Chuck Walker; #AZ131]

Cirsium wheeleri (Gray) Petrak Wheeler�s thistle [US; Arizona; Yavapai County; Prescott; T13N, R2W, S3; 5,600 feet][Acker property, west of Eastwood Dr.; May 17, 1993; Collected & identified by Chuck Walker; #AZ86]

Conoclinium coelestinum L. (DC.) blue mistflower [US; Louisiana; Calcasieu Parish; Lake Charles; T10S, R9W, S23; 15 feet][northeast quadrant of Nelson Rd-Country Club Dr. intersection; July 3, 1994; Collected & identified by Chuck Walker; #LA112]

Conyza canadensis (L.) Cronq. Canadian horseweed [US; Arizona; Yavapai County; Prescott; T.13N, R2W, S4; 5,380 feet][east side of 400 block of S. Montezuma St.; July 1, 1997; Collected & identified by Chuck Walker; #AZ456]

Conyza canadensis (L.) Cronq. var. pusilla (Nutt.) Cronq. Canadian horseweed [US; Florida; Broward County; Sunrise; T50S, R40E, S4; 5 feet][along path around lake in Markham County Park; December 31, 1997; Collected & identified by Chuck Walker; #FL29]

Coreopsis lanceolata L. lanceleaf tickseed [US; Arizona; Yavapai County; Prescott; T13N, R2W, S4; 5,460 feet][east side of Granite St., south of White Spar Rd., 10 m south of creekbed; July 8, 1997; Collected & identified by Chuck Walker; #AZ459]

Coreopsis palmata Nutt. stiff tickseed [US; Iowa; Fremont County; Riverton; T68N, R41W, S18; 930 feet][5 m south of turnoff to Riverton Check Station, Riverton Wildlife Management Area; September 12, 1999; Collected & identified by Chuck Walker; #IA137]

Crepis acuminata Nutt. tapertip hawksbeard [US; California; Modoc County; T40N, R12E, S27; 41 deg. 16.594'N, 120 deg. 34.813'W; 4,600 feet][juniper/sagebrush habitat along Crook Canyon Creek; May 21, 2005; Collected & identified by Chuck Walker; #CA210]

Crepis bakeri Greene Baker's hawksbeard [US; California; Lassen County; Madeline; T37N, R15E, S30; 41 deg. 02.993'N, 120 deg. 18.901'W; 6,100 feet][along north side of Road 510, one mile west of Clark, 0.5 miles southeast of Streshley cabin site; June 16, 2004; Collected by Matt Minarchek & Chuck Walker; Identified by Chuck Walker; #CA11]

Crepis occidentalis Nutt. largeflower hawksbeard [US; California; Modoc County; Alturas; T42N, R12E, S11; 41 deg. 29.744'N, 120 deg. 32.837'W; 4,370 feet][among sagebrush on south-facing slope; June 26, 2005; Collected by Chuck Walker; Identified by Michael Dolan; #CA261]

Crocidium multicaule Hook. common spring-gold [US; California; Modoc County; Alturas; T42N, R12E, S11; 41 deg. 29.420'N, 120 deg. 33.527'W; 4,370 feet][in lawn/field northwest of Modoc Middle School; March 12, 2005; Collected & identified by Chuck Walker; #CA141]

Dasistoma macrophylla (Nutt.) Raf. mullein foxglove [US; Arkansas; Fulton County; T21N, R5W, S28; 36 deg. 26.539'N, 91 deg. 30.561'W; 600 feet] [along dirt road leading to Riverside Resort Camp & Canoe, three miles southeast of Mammoth Spring; September 12, 2007; Collected & identified by Chuck Walker; #AR71]

Dracopis amplexicaulis (Vahl) Cass. clasping coneflower [US; Illinois; Calhoun County; T12S, R1W, S7; 425 feet][west side of Department of Natural Resources road, between northeast corner of Fuller Lake & Illinois River; June 13, 2000; Collected by Russ Engelke; Identified by Chuck Walker; #IL01]

Dracopis amplexicaulis (Vahl) Cass. clasping coneflower [US; Mississippi; Sharkey County; T13N, R5W, S21; 32 deg. 57.84'N, 90 deg. 43.91'W; 95 feet][along outside of perimeter fence, near northwest corner of Flooding Research Facility, six miles east-south-east of Anguilla; May 27, 2006; Collected & identified by Chuck Walker; #MS95]

Echinacea purpurea (L.) Moench eastern purple coneflower [US; Illinois; Jackson County; Carbondale; T9S, R1W, S16; 37 deg. 44.427'N, 89 deg. 13.635'W; 410 feet][prairie, Green Earth II, east of the Oakland Cemetery; July 26, 2003; Collected & identified by Chuck Walker; #IL519]

Eclipta prostrata (L.) L. false daisy [US; Louisiana; Calcasieu Parish; Lake Charles; T10S, R8W, S19; 15 feet][water's edge, west side of Contraband Bayou, across from 132 E Parkway; July 18, 1994; Collected & identified by Chuck Walker; #LA128]

Elephantopus carolinianus Raeusch. Carolina elephantsfoot [US; Louisiana; Calcasieu Parish; Lake Charles; T10S, R8W, S18; 15 feet][under tree in vacant lot, 50 m northwest of K-Mart at 4070 Ryan St.; August 2, 1994; Collected & identified by Chuck Walker; #LA143]

Elephantopus carolinianus Raeusch. Carolina elephantsfoot [US; Missouri; Shannon County; T28N, R6W, S36; 37 deg. 3.645'N, 91 deg. 33.584'W; 780 feet] [Rymer Campgrounds, Ozark National Scenic Riverways, ten miles northeast of Mountain View; September 7, 2007; Collected & identified by Chuck Walker; #MO16]

Emilia sonchifolia (L.) DC. var. javanica (Burm. f.) Mattf. red emilia [US; Florida; Broward County; Fort Lauderdale; T50S, R42E, S10; 5 feet][along Riverwalk by Florida East Coast Railroad tracks, downtown Fort Lauderdale; December 26, 1997; Collected & identified by Chuck Walker; #FL08]

Emilia sonchifolia (L.) DC. var. sonchifolia lilac tasselflower [US; Florida; Broward County; Fort Lauderdale; T50S, R42E, S10; 5 feet][in lawn at W. Broward Ave-Nugent Ave. intersection; December 27, 1997; Collected & identified by Chuck Walker; #FL13]

Encelia farinosa Gray ex Torr. goldenhills [US; Arizona; Yuma County; T14S, R15W, S6; 1,220 feet][along El Camino del Diablo, in the Lechuguilla desert, 4.8 miles northwest of Tule Well, Cabeza Prieta National Wildlife Refuge; November 10, 1996; Collected & identified by Chuck Walker; #AZ407]

Encelia frutescens (Gray) Gray button brittlebush [US; Arizona; Yuma County; T14S, R15W, S6; 1,220 feet][along El Camino del Diablo, in the Lechuguilla desert, 4.8 miles northwest of Tule Well, Cabeza Prieta National Wildlife Refuge; November 10, 1996; Collected & identified by Chuck Walker; #AZ408]

Erechtites hieracifolia (L.) ex DC. fireweed [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; #IL85]

Ericameria bloomeri (Gray) J.F. Macbr. rabbitbush [US; California; Lassen County; T38N, R6E, S5; 41 deg. 9.507'N, 121 deg. 17.813'W; 6,320 feet][top of Widow Mountain; August 25, 2004; Collected by Matt Minarchek & Chuck Walker; Identified by Chuck Walker; #CA112]

Ericameria greenei (Gray) Nesom Greene's goldenbush [US; California; Modoc County; T43N, R15E, S16; 41 deg. 35.293'N, 120 deg. 16.376'W; 8,100 feet][northeast slope of Cedar Mountain; August 28, 2004; Collected & identified by Chuck Walker; #CA120]

Ericameria nauseosa (Pallas ex Pursh) Nesom & Baird ssp. consimilis (Greene) Nesom & Baird var. oreophila (A. Nels.) Nesom & Baird rubber rabbitbrush [US; Oregon; Lake County; T41S, R17E, S22; 42 deg. 5.179'N, 120 deg. 42.220'W; 5,200 feet][perimeter of campground, Dog Lake; September 5, 2004; Collected & identified by Chuck Walker; #OR05]

Ericameria nauseosa (Pallas ex Pursh) Nesom & Baird ssp. nauseosa var. glabrata (Gray) Nesom & Baird rubber rabbitbrush [US; Arizona; Coconino County; T23N, R8E, S23; 7,000 feet][Sunset Crater; September 29, 1996; Collected & identified by Chuck Walker; #AZ397]

Erigeron annuus (L.) Pers. eastern daisy fleabane [US; Illinois; Calhoun County; Brussels; T13S, R1W, S16; 425 feet][along road (dike), 50 m northeast of Two Rivers National Wildlife Refuge Office; July 23, 2000; Collected & identified by Chuck Walker; #IL39]

Erigeron compositus Pursh cutleaf daisy [US; Washington; Spokane County; Spokane; T25N, R43E, S28; 2,300 feet][Lincoln Park; April 12, 1998; Collected & identified by Chuck Walker; #WA18]

Erigeron concinnus (Hook. & Arn.) Torr. & Gray Navajo fleabane [US; Arizona; Yavapai County; Prescott; T14N, R2W, S33; 5,380 feet][behind Silver G Apartments at 220 E. Willis St; April 30, 1993; Collected & identified by Chuck Walker; #AZ59]

Erigeron divergens Torr. & Gray spreading fleabane [US; Arizona; Pima County; Ajo; T12S, R6W, S14; 1,720 feet][behind Baseball Field on Well Rd.; March 26, 1997; Collected & identified by Chuck Walker; #AZ419]

Erigeron eatonii Gray var. eatonii Eaton�s fleabane [US; Arizona; Coconino County; T22N, R6E, S24; 7,440 feet][20 m southeast of Snowbowl Rd-Rd 164B junction, 800 m from Highway 180; July 26, 1997; Collected & identified by Chuck Walker; #AZ477]

Erigeron eatonii Gray var. sonnei (Greene) Nesom Eaton�s fleabane [US; California; Lassen County; T37N, R12E, S2; 41 deg. 3.956'N, 120 deg. 33.279'W; 5,820 feet][along dry, seasonal drainage, 0.5 miles south-south-east of Stipa Spring; July 26, 1997; Collected by Lisa Anderson & Chuck Walker; Identified by Michael Dolan; #CA303]

Erigeron elegantulus Greene blue dwarf fleabane [US; California; Lassen county; T36N, R10E, S7; 40 deg. 58.431'N, 120 deg. 51.810'W; 5,906 feet][west-facing hillside east of Drift Fence Reservoir; July 20, 2004; Collected by Matt Minarchek & Chuck Walker; Identified by Chuck Walker; #CA71]

Erigeron philadelphicus L. Philadelphia fleabane [US; Louisiana; Calcasieu Parish; Lake Charles; T10S, R8W, S19; 15 feet] [On Ryan St. bridge over the Contraband Bayou, March 22, 1994; Collected & identified by Chuck Walker; #LA51]

Erigeron philadelphicus L. Philadelphia fleabane [US; Mississippi; Sharkey County; T13N, R5W, S21; 32 deg. 57.830'N, 90 deg. 43.897'W; 95 feet] [interior levee between cells 3 & 4, Flooding Research Facility, six miles east-south-east of Anguilla, April 6, 2006; Collected by Chuck Walker; Identified by Danny Skojac; #MS44]

Erigeron strigosus Muhl. ex Willd. var. strigosus prairie fleabane [US; Iowa; Fremont County, T68N, R42W, S29; 1,220 feet][30 m from Observation Point (Overlook Trail), Waubonsie State Park; June 3, 1999; Collected & identified by Chuck Walker; #IA13]

Eucephalus breweri (Gray) Nesom Brewer's aster [US; California; Siskiyou county; T46N, R1E, S23; 41 deg. 48.922'N, 121 deg. 50.146'W; 5,440 feet][along 4WD road leading up to saddle between two peaks of Sheep Mountain range; August 5, 2004; Collected by Matt Minarchek & Chuck Walker; Identified by Chuck Walker; #CA94]

Eucephalus ledophyllus (Gray) Greene var. ledophyllus Cascade aster [US; California; Siskiyou county; T46N, R1E, S14; 41 deg. 49.853'N, 121 deg. 50.097'W; 4,720 feet][along road on west side of Red Rock Lakes; August 11, 2004; Collected by Matt Minarchek & Chuck Walker; Identified by Chuck Walker; #CA99]

Eupatorium altissimum L. tall thoroughwort [US; Iowa; Fremont County; T68N, R42W, S32; 1,200 feet][lower end of Campgrounds on west side of loop, Waubonsie State Park; September 3, 1999; Collected & identified by Chuck Walker; #IA126]

Eupatorium hyssopifolium L. var. hyssopifolium hyssopleaf thoroughwort [US; Louisiana; Calcasieu Parish, Lake Charles; T10S, R8W, S29; 15 feet][field between Tallow Rd & Link Rd, 50 m from eastern-most ends; August 4, 1994; Collected & identified by Chuck Walker; #LA145]

Eupatorium maculatum L. spotted joepyeweed [US; Wisconsin; Ashland County; T45N, R2W, S1; 1,160 feet][gravel pit area above Catalino's Bog, on the east side of Tuler Forks and Highway 169, six miles north-north-west of Tyler Forks; September 8, 2001; Collected & identified by Chuck Walker; #WI23]

Eupatorium perfoliatum L. var. perfoliatum common boneset [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; #WI06]

Eupatorium purpureum L. sweetscented joepyeweed [US; Illinois; Calhoun County; T10S, R2W, S6; 570 feet][south side of Gresham Hollow Rd., 2.1 miles east of Mississippi River Rd; July 29, 2000; Collected by Lou Hanes & Chuck Walker; Identified by Chuck Walker #IL44]

Eupatorium serotinum Michx. lateflowering thoroughwort [US; Illinois; Calhoun County; Brussels; T13S, R1W, S16; 440 feet][5 m southwest of trailer, southwest portion of Maintenance Yard, Two Rivers National Wildlife Refuge; September 3, 2000; Collected & identified by Chuck Walker; #IL75]

Euthamia occidentalis Nutt. western goldentop [US; California; Lassen County; T35N, R7E, S15; 40 deg. 53.867'N, 121 deg. 10.292'W; 4,170 feet] [along Horse Creek, about 0.5 miles northeast of Little Valley; September 8, 2004; Collected & identified by Chuck Walker; #CA126]

Gaillardia pinnatifida Torr. var. pinnatifida red dome blanketflower [US; Texas; Carson County; Groom; 3,350 feet][along I-40 by overpass of Exit 105, six miles west of Groom; May 20, 1997; Collected by Queen Ottawa & Chuck Walker; Identified by Chuck Walker; #TX04]

Gaillardia pulchella Foug. firewheel [US; Arizona; Yavapai County; Prescott; T13N, R2W, S4; 5,460 feet][east side of S. Granite St (south of White Spar Rd.), 10 m north of creekbed; July 6, 1997; Collected & identified by Chuck Walker; #AZ457]

Gamochaeta pensylvanica (Willd.) Cabrera Pennsylvania everlasting [US; Louisiana; Calcasieu Parish; Lake Charles; T10S, R8W, S20; 15 feet][behind apartment building at 4324 Auburn St; March 8, 2000; Collected & identified by Chuck Walker; #LA220]

Gamochaeta purpurea (L.) Cabrera spoonleaf purple everlasting [US; Arkansas; Lincoln County; Star City; T9S, R7W, S22; 33 deg. 55.168'N, 91 deg. 48.181'W; 196 feet] [along south side of Highway #293; April 24, 2008; Collected & identified by Chuck Walker; #AR84]

Gamochaeta purpurea (L.) Cabrera spoonleaf purple everlasting [US; Illinois; Saline County; Somerset; T10S, R7E, S14; 420 feet][east side of roadside, 20 m north of Dennison Hollow; June 1, 2002; Collected & identified by Chuck Walker; #IL288]

Gnaphalium palustre Nutt. western marsh cudweed [US; Washington; Spokane County; Spokane; T25N, R43E, S29; 2,240 feet][Ferris Perennial Garden, Manito Park; July 28, 1998; Collected & identified by Chuck Walker; #WA91]

Grindelia lanceolata Nutt. narrowleaf gumweed [US; Missouri; Douglas County; T26N, R11W, S25; 36 deg. 54.476'N, 92 deg. 6.181'W; 870 feet] [along edge of parking lot, Noblett Dam, Mark Twain National Forest, ten miles southwest of Willow Springs; September 7, 2007; Collected & identified by Chuck Walker; #MO14]

Grindelia nana Nutt. Idaho gumweed [US; Washington; Spokane County; Spokane; T25N, R43E, S19; 2,180 feet][north side of Cliff Ave., above Pioneer Park; July 10, 1998; Collected & identified by Chuck Walker; #WA78]

Grindelia nuda var. aphanactis (Rydb.) Nesom. curlytop gumweed [US; Arizona; Yavapai County; Paulden; T17N, R1W, S8; 4,110 feet][west bank of Verde River, three miles downstream from its convergence with Granite Creek; August 24, 1996; Collected & identified by Chuck Walker; #AZ383]

Grindelia squarrosa (Pursh) Dunal curlycup gumweed [US; Arizona; Yavapai County; Prescott; T13N, R2W, S4; 5,380 feet][vacant lot 30 m northeast of S. Montezuma St-Leroux St. intersection; July 11, 1995; Collected & identified by Chuck Walker; #AZ196]

Gutierrezia sarothrae (Pursh) Britt. & Rusby broom snakeweed [US; Arizona; Yavapai County; T16N, R6W, S1; 5,960 feet][ridge top along Camp Wood Rd., west of turnoff to Cottonwood Canyon, four miles from Williamson Valley Rd; September 17, 1995; Collected & identified by Chuck Walker; #AZ229]

Gynura x sarmentosa Cass. purple passion vine [Origin: Old World tropics] [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; #IL611]