POACEAE (Grass family): H through Z

Hesperostipa neomexicana (Thurb. ex Coult.) Barkworth New Mexico feathergrass [US; New Mexico; Cibola County; T11N, R9W, S22; 35deg. 5.01'N, 107 deg., 46.26'W; 6,400 feet][along Highway 117, 0.25 miles south of I-40; May 19, 1997; Collected & identified by Chuck Walker; #NM02]

Heteropogon contortus (L.) Beauv. ex Roemer & J.A. Schultes tanglehead [US; Arizona; Pima County; T15S, R10W, S28; 900 feet][dry creekbed behind Papago Well, Cabeza Prieta National Wildlife Refuge; November 9, 1996; Collected & identified by Chuck Walker; #AZ404]

Hierochloe hirta (Schrank) Borb�s ssp. arctica (J. Presl) G. Weim. northern sweetgrass [US; Minnesota; Itasca County; Swan River; T53N, R22W, S31; 1,250 feet][north side of County Rd. #428, 4.75 miles south of Highway 2 (Swan River Post Office; May 28, 1997; Collected & identified by Chuck Walker; #MN04]

Hordeum arizonicum Covas Arizona barley [US; Arizona; Yavapai County; Black Canyon City; T8N, R2E, S3; 1,974 feet][along Aqua Fria River, near Community 1st National Bank; February 21, 1999; Collected & identified by Chuck Walker; #AZ496]

Hordeum brachyantherum Nevski ssp. brachyantherum meadow barley [US; New Mexico; Quay County; San Jon; T10N, R34E, S9; 4,030 feet][along road by San Jon Cemetery, Exit 356 off I-40; May 20, 1997; Collected & identified by Chuck Walker; #NM07]

Hordeum jubatum ssp. jubatum L. foxtail barley [US; Washington; Spokane County; Spokane; T25N, R43E, S28; 2,300 feet][along trail in south-central portion of Lincoln Park; July 12, 1998; Collected & identified by Chuck Walker; #WA81]

Hordeum murinum L. ssp. glaucum (Steud.) Tzvelev smooth barley [US; Arizona; Yavapai County; Prescott; T13N, R2W, S4; 5,380 feet][vacant lot at 435 S. Montezuma St.; April 5, 1996; Collected & identified by Chuck Walker; #AZ259]

Koeleria macrantha DC. prairie Junegrass [US; Illinois; Monroe County; Fults; T4S, R10W, S27; 38 deg. 9.481'N, 90 deg. 11.529'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; #IL395]

Koeleria macrantha DC. prairie Junegrass [US; California; Lassen County; T36N, R11E, S5; 40 deg. 59.336'N, 120 deg. 43.651'W; 6,100 feet][hillside south of Blue Lake fire site; July 14, 2004; Collected by Matt Minarchek & Chuck Walker; Identified by Chuck Walker; #CA54]

Leersia lenticularis Michx. catchfly grass [US; Mississippi; Bolivar County; T25N, R6W, S34; 33 deg. 59.36'N, 90 deg. 48.14'W; 155 feet][approximately 3.7 miles northwest of Shelby and about three miles west of US 61, isolated tract of bottomland hardwood forest surrounded by agricultural fields; November 2, 2005; Collected & identified by Danny Skojac; #01195]

Leersia virginica Willd. whitegrass [US; Illinois; Calhoun County; T12S, R1W, S7; 425 feet][near Illinois Department of Natural Resources gate near boat launch on Fuller Lake, Hadley Landing; September 21, 2000; Collected & identified by Chuck Walker; #IL92]

Leersia virginica Willd. whitegrass [US; Arkansas; Montgomery County; T4S, R27W, S32; 34 deg. 21.805'N, 93 deg. 54.104'W; 890 feet] [along trail into Winding Stairs, about a mile southwest of Albert Pike Recreation Area, Ouachita National Forest; September 3, 2006; Collected & identified by Chuck Walker; #AR48]

Leptochloa panicea (Retz.) Ohwi ssp. brachiata (Steudl.) N. Snow mucronate sprangeltop [US; Mississippi; Washington County; T18N, R7W, S15; 33 deg. 24.597'N, 90 deg. 54.603'W; 110 feet][along the western (southern) edge of Deer Creek, Leland; October 7, 2007; Collected & identified by Chuck Walker; #MS129]

Leptochloa panicea (Retz.) Ohwi ssp. mucronata (Michx.) Nowack mucronate sprangletop [US; Louisiana; Calcasieu Parish; T11S, R9W, S21; 5 feet][east side of Highway 384, 0.5 miles north of Intracoastal Waterway, one mile north of Black Bayou; October 14, 1994; Collected & identified by Dr. James Brooks & Chuck Walker; #LA172]

Leptochloa panicoides (J. Presl) A.S. Hitchc. Amazon sprangletop [US; Missouri; Mississippi County; T25N, R16E, S21; 36 deg. 48.252'N, 89 deg. 19.162'W; 300 feet][1 m west of Highway 75 bridge over spillway ditch (north bank), 1.2 miles south-south-east of Anniston; September 7, 2002; Collected & identified by Chuck Walker; #MO03]

Leymus cinereus (Scribn. & Merr.) A. L�ve basin wildrye [US; California; Lassen County; T38N, R15E, S33; 41 deg. 6.554'N, 120 deg. 16.468'W; 6,560 feet] [near vernal pool, along 4WD road leading south to Clarks Valley); August 6, 2004; Collected by Matt Minachek & Chuck Walker; Identified by Chuck Walker; #CA95]

Lolium perenne L. ssp. multiflorum (Lam.) Husnot Italian ryegrass [US; Arizona; Yavapai County; Mayer; T12N, R1W, S28; 5,580 feet][campgrounds at junction of Senator Highway (Rd. 52) and Rd. 67, ten miles from Mayer; July 12, 1997; Collected & identified by Chuck Walker; #AZ465]

Lolium perenne ssp. multiflorum (Lam.) Husnot Italian ryegrass [[US; Mississippi; Sharkey County; T13N, R6W, S13; 32 deg. 58.347'N, 90 deg. 45.565'W; 100 feet] [above Big Widow Bayou, at Widow Bayou Road-Linsey Road intersection, east-south-east of Anguilla, April 8, 2006; Collected & identified by Chuck Walker; #MS53]

Lolium perenne L. ssp. perenne perennial ryegrass [US; Arizona; Yavapai County; Prescott; T13N, R2W, S4; 5,360 feet][along sidewalk on south side of 100 block of E. Carleton St.; June 28, 1997; Collected & identified by Chuck Walker; #AZ454]

Lycurus phleoides Kunth common wolfstail [US; Arizona; Yavapai County; T13N, R2W, S15; 6,160 feet][at turn-off (and dirt road), just north of entrance to Goldwater Lake; August 17, 1996; Collected & identified by Chuck Walker; #AZ371]

Melinis repens (Willd.) Zizka rose Natal grass [US; Florida; Broward County; Fort Lauderdale; T50S, R42E, S3; 5 feet][along Florida East Coast railroad tracks between S. Andrews Ave. and NW 1st Ave.; December 30, 1997; Collected & identified by Chuck Walker; #FL26]

Microstegium vimineum (Trin.) A. Camus Nepalese browntop [US; Illinois; Pope County; T15S, R7E; 420 feet][along creek; October 5, 2002; Collected & identified by Chuck Walker; #IL450]

Miscanthus sacchariflorus (Maxim.) Franch. Amur silvergrass [US; Iowa; Fremont County; T68N, R41W, S19; 900 feet][along County Rd. J46, along West Nishnabotna River, north of bridge; July 18, 1999; Collected & identified by Chuck Walker; #IA68]

Miscanthus sinensis Anderss. Chinese silvergrass [US; Illinois; Jackson County; Carbondale; T9S, R1W, S21; 37 deg. 42.996'N; 89 deg. 13.175'W; 450 feet][formal garden, northwest corner of Faner Hall, Southern Illinois University; September 7, 2003; Collected & identified by Chuck Walker; #IL528]

Muhlenbergia capillaris (Lam.) Trin. hairawn muhly [US; Texas; Orange County; Orange; 15 feet][near railroad tracks on east side of Highway #62, two miles north of I-10; November 4, 1994; Collected & identified by Dr. James Brooks & Chuck Walker; #TX02]

Muhlenbergia cuspidata(Torr. ex Hook.) Rydb. plains muhly [US; Illinois; Monroe County; Fults; T4S, R10W, S27; 38 deg. 9.486'N, 90 deg. 11.549'W; 600 feet][at edge of limestone cliff, Fults Hill Prairie Nature Preserve; July 22, 2002; Collected & identified by Dr. Mark A. Basinger & Chuck Walker; #IL401]

Muhlenbergia frondosa (Poir.) Fern. wirestem muhly [US; Iowa; Fremont County; T68N, R42W, S32; 1,200 feet][edge of woods by prairie, 80 m west of upper picnic grounds road, south side of Sunset Ridge Trail, Waubonsie State Park; October 29, 1999; Collected & identified by Kyle Ehlers & Chuck Walker; #IA138]

Muhlenbergia microsperma (DC.) Trin. littleseed muhly [US; Arizona; Pima County; T15S, R10W, S28; 900 feet][dry creekbed behind Papago Well, Cabeza Prieta National Wildlife Refuge; November 9, 1996; Collected & identified by Chuck Walker; #AZ405]

Neyraudia reynaudiana (Kunth) Keng ex A.S. Hitchc. silkreed [US; Florida; Broward County; T50S, R40E, S4; 5 feet][along path around lake in Markham County Park; December 31, 1997; Collected & identified by Chuck Walker; #FL35]

Oplismenus hirtellus (L.) Beauv. ssp. setarius (Lam.) Mez ex Ekman bristle basketgrass [US; Louisiana; Calcasieu Parish; Lake Charles; T10S, R8W, S19; 15 feet][vacant lot west of Frasch Hall (McNeese State University), west side of Ryan St.; October 12, 1994; Collected & identified by Chuck Walker; #LA169]

Oryza sativa L. rice [US; Illinois; Calhoun County; Brussels; T13S, R1W, S8; 430 feet][cultivated at Golden Eagle Duck Club; November 1, 2000; Collected & identified by Lee Tepen; #IL101]

Oryza sativa L. rice [US; Mississippi; Washington County; Stoneville; T19N, R7W, S33; 33 deg. 27.264'N, 90 deg. 55.872'W; 110 feet][within the fenced facility, west side of Feather Farm Rd., Delta Experimental Forest; October 12, 2008; Collected & identified by Chuck Walker; #MS166]

Panicum anceps Michx. beaked panicgrass [US; Illinois; Jackson County; Carbondale; T9S, R1W, S32; 37 deg. 41.423'N, 88 deg. 14.468'W; 470 feet][grassy, open meadow, 0.35 miles southwest of Carbondale Reservoir; July 20, 2003; Collected & identified by Chuck Walker; #IL518]

Panicum capillare L. witchgrass [US; Washington; Spokane County; Spokane; T25N, R43E, S29; 2,240 feet][Ferris Perennial Garden, Manito Park; July 29, 1998; Collected & identified by Chuck Walker; #WA93]

Panicum dichotomiflorum Michx. fall panicgrass [US; Florida; Broward County; Fort Lauderdale; T50S, R42E, S3; 5 feet][along Florida East Coast Railroad tracks between S. Andrews Ave. and NW 1st Ave.; December 30, 1997; Collected & identified by Chuck Walker; #FL27]

Panicum dichotomiflorum Michx. var. dichotomiflorum fall panicgrass [US; Louisiana; Calcasieu Parish; Lake Charles; T11S, R8W, S7; 10 feet][west side of Highway #385, 6.1 miles south of McNeese St.; October 14, 1994; Collected & identified by Dr. James Brooks & Chuck Walker; #LA173]

Panicum dichotomiflorum Michx. var. dichotomiflorum fall panicgrass [US; Kentucky; Ballard County; 37� 4.379'N, 88� 55.431'W ; 380 feet][0.4 miles south of Highway 60, 2.4 miles east-south-east of LaCenter; September 28, 2002; Collected & identified by Romina Vidal Russell & Chuck Walker; #KY01]

Panicum flexile (Gattinger) Scribn. wiry panicgrass [US; Illinois; Pope County; Hamletsburg; T15S, R7E; 425 feet][August 11, 2002; Collected & identified by by Nate Small & Chuck Walker; #IL421]

Panicum hirticaule J. Presl var. hirticaule Mexican panicgrass [US; Oklahoma; Beckham County; T9N, R24W, S20; 1,950 feet][along I-40, thirteen miles east of Texas-Oklahoma state line; May 20, 1997; Collected & identified by Queen Ottawa & Chuck Walker; #OK02]

Panicum miliaceum L. ssp. miliaceum broomcorn millet [US; Iowa; Fremont County; T68N, R42W, S29; 1,200 feet][along Ridge Trail, 500 m northwest of the main Observation Point, Waubonsie State Park; September 9, 1999; Collected & identified by Chuck Walker; #IA136]

Panicum obtusum Kunth vine mesquite [US; Arizona; Yavapai County; Prescott; T13N, R2W, S4; 5,360 feet][north side of Carleton St., 10 m east of S. Montezuma St.; June 23, 1996; Collected & identified by Chuck Walker; #AZ320]

Panicum philadelphicum Bernh. ex Trin. Philadelphia panicgrass [US; Louisiana; Morehouse Parish; T22N, R6E, S10; 32 deg. 54.493'N, 91 deg.50.791'W; 110 feet] [along edge of woods at entranceway to campgrounds at Chemin-A-Haut State Park; April 25, 2009; Collected & identified by Chuck Walker; #LA285]

Panicum rigidulum Bosc. ex Nees redtop panicgrass [US; Illinois; Calhoun County; Brussels; T13S, R1W, S16; 420 feet][along road on north edge of Calhoun Moist Soil Unit (#1), 50 m west of Pump Station, Two Rivers National Wildlife Refuge; August 15, 2000; Collected & identified by Chuck Walker; #IL58]

Panicum tenerum Bey. ex Trin. bluejoint panicgrass [US; Florida; Broward County; Davie; T50S, R41W, S28; 5 feet][north side of Orange Dr., 200 m west of S. University Dr.; January 10, 1998; Collected & identified by Chuck Walker; #FL81]

Panicum virgatum L. var. virgatum switchgrass [US; Iowa; Fremont County; T68N, R42W, S32; 1,150 feet][southern-most parking lot, end of road to upper picnic grounds, Waubonsie State Park; July 24, 1999; Collected & identified by Chuck Walker; #IA81]

Pascopyrum smithii (Rydb.) A.L�ve western wheatgrass [US; California; Modoc County; Alturas; T42N, R12E, S17; 4,400 feet][along road, northwest side of Road 56 (Parker Creek Road); June 27, 2004; Collected & identified by Chuck Walker; #CA23]

Paspalum conjugatum Berg. hilograss [US; Louisiana; Calcasieu Parish; Lake Charles; T10S, R8W, S19; 15 feet][in lawn on west side of Frasch Hall, McNeese State University; September 24, 1994; Collected & identified by Chuck Walker; #LA161]

Paspalum dilatatum Poir. dallisgrass [US; Illinois; Jackson County; Carbondale; T9S, R1W, S28; 450 feet][southeast corner of Life Science II building, Southern Illinois University; July 11, 2001; Collected & identified by Chuck Walker; #IL202]

Paspalum dilatatum Poir. dallisgrass [US; Mississippi; Washington County; Leland; T18N, R7W, S15; 33 deg. 24.602'N, 90 deg. 54.727'W; 125 feet][in lawn of West Bend Apartments; July 18, 2007; Collected & identified by Chuck Walker; #MS127]

Paspalum distichum L. knotgrass [US; Arizona; Yavapai County; Paulden; T17N, R1W, S40; 4,240 feet][along Verde River, 2.5 miles down from where it converges with Granite Creek; August 24, 1996; Collected & identified by Chuck Walker; #AZ385]

Paspalum laeve Michx. field paspalum [US; Illinois; Saint Clair County; Belleville; T1N, R8W, S19; 38 deg. 31.546'N, 90 deg. 1.22'W; 550 feet][along south side of railroad tracks; August 7, 2002; Collected & identified by Chuck Walker; #IL416]

Paspalum notatum Fluegg� var. saurae Parodi bahiagrass [US; Arkansas; Pike County; T6S, R25W, S17; 34 deg. 13.833'N, 93 deg. 41.370'W; 560 feet] [along shore of Lake Greeson, Kirby Landing Public Use Area; September 4, 2006; Collected by Chuck Walker; Identified by Chuck Walker & Danny Skojac; #AR53]

Paspalum notatum Fluegg� var. saurae Parodi bahiagrass [US; Mississippi; Washington County; Leland; T18N, R7W, S15; 33 deg. 24.59'N, 90 deg. 54.54'W; 110 feet][along the north side of Deer Creek, southeast of Pippin St.; July 13, 2007; Collected & identified by Chuck Walker; #MS126]

Paspalum pubiflorum Rupr. ex Fourn. hairyseed paspalum [US; Illinois; Calhoun County; Hardin; T10S, R2W, S27; 440 feet][along Illinois River, 50 m downstream from bridge; September 10, 2000; Collected & identified by Chuck Walker; #IL79]

Paspalum urvillei Steud. Vasey's grass [US; Louisiana; Calcasieu Parish; Lake Charles; T10S, R8W, S19; 15 feet][vacant lot on west side of Ryan St., west of Frasch Hall, McNeese State University; September 24, 1994; Collected & identified by Chuck Walker; #LA162]

Paspalum urvillei Steud. Vasey's grass [US; Mississippi; Sharkey County; Anguilla; T13N, R5W, S20; 32 deg. 57.096�N, 90 deg. 44.221�W; 110 feet][along mowed access road, Block 2, Sharkey Restoration Research and Demonstration Site, 1.5 miles east of Anguilla; June 17, 2008; Collected & identified by Chuck Walker; #MS136]

Paspalum vaginatum Sw. seashore paspalum [US; Louisiana; Calcasieu Parish; Lake Charles; T10S, R8W, S19; 15 feet][in parking lot median behind Sallier Dormitory, McNeese State University; May 15, 1994; Collected & identified by Chuck Walker; #LA82]

Pennisetum ciliare (L.) Link. buffelgrass [US; Arizona; Pima County; Ajo; T12S, R6W, S15; 1,800 feet][North St.-State Route #85 intersection; March 25, 1997; Collected & identified by Chuck Walker; #AZ416]

Pennisetum glaucum (L.) R. Br. pearl millet [US; Louisiana; Calcasieu Parish; Lake Charles; T10S, R8W, S19; 10 feet][along retaining wall above Contraband Bayou, 20 m east of Ryan St., McNeese State University; August 17, 1997; Collected & identified by Chuck Walker; #LA195]

Pennisetum setaceum (Forsk.) Chiov. crimson fountaingrass [US; Arizona; Pima County; Ajo; T12S, R6W, S15; 1,800 feet][behind building at 560 N 2nd Ave. and State Route 85; March 26, 1997; Collected & identified by Chuck Walker; #AZ422]

Phalaris angusta Nees ex Trin. timothy canarygrass [US; Louisiana; Calcasieu Parish; T9S, R8W, S16; 15 feet][2 m south of English Bayou, under the bridge on Highway 171; April 20, 2000; Collected & identified by Chuck Walker; #LA261]

Phalaris arundinacea L. reed canarygrass [US; Illinois; Jackson County; Carbondale; T10S, R1W, S4; 400 feet][west side of Springer Rd., in low flat area north of Bosky Dell; May 24, 2001; Collected & identified by Chuck Walker; #IL139]

Phalaris canariensis L. annual canarygrass [US; Illinois; Jackson County; Carbondale; T9S, R1W, S28; 440 feet][west side of the Illinois Central Gulf Railroad tracks, where they pass under Pleasant Hill Rd.; June 2, 2001; Collected & identified by Chuck Walker; #IL154]

Phleum alpinum L. alpine timothy [US; California; Modoc County, Alturas; T43N, R14E, S13; 41 deg. 33.589'N, 120 deg. 17.780'W; 5,840 feet][along north side of Thoms Creek, Cedar Pass Campground, south side of Highway #299, about 1.5 miles west of Cedar Pass; August 21, 2004; Collected & identified by Chuck Walker; #CA105]

Phleum pratense L. timothy [US; Washington; Spokane County; Spokane; T25N, R43E, S28; 2,300 feet][along asphalt road leading up north-facing slope in Lincoln Park; June 28, 1998; Collected & identified by Chuck Walker; #WA62]

Phragmites australis (Cav.) Trin. ex Steud. common reed [US; Pennsylvania; Erie County; Erie; 570 feet][south side of the Bayfront Highway near the Public Dock; September 13, 1998; Collected & identified by Chuck Walker; #PA13]

Phyllostachys aureosulcata McClure yellow grove bamboo [Origin: China] [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; #MO10]

Piptochaetium avenaceum (L.) Parodi blackseed speargrass [US; Arkansas; Hot Spring County; 34 deg. 25.819'N, 92 deg. 56.882'W; T3S, R18W, S32; 420 feet][along Highway #171, south of Diamondhead Golf Course, April 23, 2006; Collected & identified by Chuck Walker; #AR05]

Pleuraphis jamesii Torr. James' galleta [US; Colorado; Jefferson County, Genessee; T4S, R71N, S13; 39 deg. 42.414'N, 105 deg. 17.634'W; 7,840 feet][20 m southeast of Genesee Country Store; June 4, 2004; Collected & identified by Chuck Walker; #CO04]

Pleuraphis rigida Thurb. big galleta [US; Arizona; Yuma County; T14S, R15W, S6; 1,220 feet][4.8 miles northwest of Tule Well, along El Camino del Diablo, Cabeza Prieta National Wildlife Refuge; November 10, 1996; Collected & identified by Chuck Walker; #AZ410]

Poa annua L. annual bluegrass [US; Washington; Spokane County; Spokane; T25N, R43E, S29; 2,260 feet][Manito Park, near E. 22nd Ave.-Tekoa St. intersection; June 8, 1998; Collected & identified by Chuck Walker; #WA37]

Poa autumnalis Muhl. ex Ell. autumn bluegrass [US; Louisiana; Calcasieu Parish; Lake Charles; T10S, R8W, S20; 15 feet][behind building at 4324 Auburn St.; March 8, 2000; Collected & identified by Chuck Walker; #LA221]

Poa bulbosa L. bulbous bluegrass [US; Washington; Spokane County; Spokane; T25N, R43E, S18; 1,880 feet][under guardrail, 20 m northeast of Spokane Falls Blvd.-Main Ave. intersection; April 6, 1998; Collected & identified by Chuck Walker; #WA07]

Poa bulbosa L. bulbous bluegrass [US; California; Lassen County; T37N, R15E, S4; 41 deg. 06.380'N, 120 deg. 16.425'W; 6,575 feet][along west side of dirt road, ca. 3 miles west of Road #510, Warner Mountains; June 9, 2004; Collected by Chuck Walker; Identified by Mike Dolan; #CA04]

Poa chapmaniana Scribn. Chapman's bluegrass [US; Illinois; Jackson County; Carbondale; T9S, R1W, S28; 440 feet][along walkway leading up to 1575 Logan Dr. (middle lot), Southern Hills; April 20, 2002; Collected & identified by Chuck Walker; #IL266]

Poa compressa L. Canada bluegrass [US; Washington; Spokane County; Spokane; T25N, R44E, S19; 2,150 feet][along ravine againt rock cliff, east side of Dishman Hills Natural Area; July 3, 1998; Collected & identified by Chuck Walker; #WA71]

Poa cusickii Vasey ssp. cusickii Cusick's bluegrass [US; California; Modoc County; T40N, R12E, S27; 41 deg. 16.617'N, 120 deg. 35.104'W; 4,810 feet][juniper/sagebrush habitat along Crook Canyon Creek; May 21, 2005; Collected by Chuck Walker; Identified by Mike Dolan & Chuck Walker; #CA212]

Poa fendleriana (Steud.) Vasey muttongrass [US; Arizona; Yavapai County; Prescott; T13N, R2W, S4; 5,360 feet][southwest quadrant of S. Marina St.-E. Carleton St. intersection; April 13, 1996; Collected & identified by Chuck Walker; #AZ262]

Poa howellii Vasey & Scribn. Howell's bluegrass [US; California; Shasta County; T36N, R4E, S10; 40 deg. 59.45'N, 121 deg. 30.50'W; 2,860 feet][along perimeter of Pit River Campgrounds, about six miles northeast of Cassel; May 18, 2005; Collected & identified by Chuck Walker; #CA207]

Poa nervosa (Hook.) Vasey Wheeler bluegrass [US; Washington; Spokane County; Spokane; T25N, R44E, S19; 2,150 feet][along ravine against rock cliff, east side of Dishman Hills Natural Area; July 3, 1998; Collected & identified by Chuck Walker; #WA72]

Poa pratensis L. Kentucky bluegrass [US; Illinois; Jackson County; Carbondale; T9S, R1W, S27; 430 feet][along west side of parking lot, between the two pedestrian overpasses, Southern Illinois University; May 17, 2003; Collected by Chuck Walker; Identified by Mike Mibb; #IL481]

Poa sylvestris Gray woodland bluegrass [US; Illinois; Williamson County; Carterville; T9S, R1E, S13; 440 feet][40 m south of Coal Rd.-Automotive Dr., within 5 m of west side of fence, College of Applied Science & Arts, Southern Illinois University; May 11, 2001; Collected & identified by Chuck Walker; #IL126]

Poa wolfii Scribn. Wolf's bluegrass [US; Iowa; Fremont County; T68N, R42W, S29; 1,200 feet][10 m northwest of Observation Point (Overlook Trail), Waubonsie State Park; June 2, 1999; Collected & identified by Chuck Walker; #IA11]

Polypogon monspeliensis (L.) Desf. annual rabbitsfoot grass [US; Arizona; Yavapai County; T16N, R6W, S22; 5,360 feet][by corral in Cottonwood Canyon off Camp Wood Rd., six miles from Williamson Valley Rd., 22 miles from Prescott; October 17, 1995; Collected by Chuck Walker; Identified by Jim Manard; #AZ238]

Polypogon viridis (Gouan) Breistr. beardless rabbitsfoot grass [US; Arizona; Yavapai County; Paulden; T17N, R1W, S5; 4,130 feet][in mass of vegetation along river's edge, 2.5 miles downstream from Granite Creek-Verde River confluence; August 24, 1996; Collected & identified by Chuck Walker; #AZ386]

�Pseudelymus saxicola (Scribn. & J.G. Sm.) Barkworth & D.R. Dewey [Elymus elymoides � Pseudoroegneria spicata] foxtail wheatgrass [US; Arizona; Yavapai County; Prescott; T13N, R2W, S4; 5,330 feet][along Granite Creek, 20 m upstream from Gurley St.; May 17, 1996; Collected & identified by Chuck Walker; #AZ277]

Pseudoroegneria spicata (Pursh) A. L�ve bluebunch wheatgrass [US; Colorado; Jefferson County; Genesee; T4S, R71, 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; #CO06]

Puccinellia nuttalliana (J.A. Schultes) A.S. Hitchc. Nuttall's alkaligrass [US; Pennsylvania; Erie County; Erie; 570 feet][along Bayfront Highway near Public Dock; September 13, 1998; Collected & identified by Chuck Walker; #PA17]

Puccinellia simplex Scribn. California alkaligrass [US; California; Modoc County; Cedarville; T45N, R16E, S11; 41 deg. 36.860'N, 120 deg. 6.357'W; 4,580 feet] [along margin of alkali scald in sagebrush habitat, eight miles northeast of Cedarville; May 14, 2005; Collected & identified by Chuck Walker; #CA204]

Rottboellia cochinchinensis (Lour.) W.D. Clayton itchgrass [US; Louisiana; Calcasieu Parish; T10S, R8W, S19; 15 feet][above Contraband Bayou, near intersection of E. Parkway St. and Contour Dr.; August 31, 1997; Collected & identified by Chuck Walker; #LA201]

Saccharum coarctatum (Fern.) R. Webster compressed plumegrass [US; Texas; Orange County; 15 feet][along Missouri Pacific Railroad tracks, east side of Highway #62, two miles north of I-10; November 4, 1994; Collected & identified by Dr. James Brooks & Chuck Walker; #TX03]

Saccharum giganteum (Walt.) Pers. sugarcane plumegrass [US; Mississippi; Sharkey County; 95 feet; T13N, R5W, S17; 32 deg. 57.94'N, 90 deg. 44.03'W; 95 feet][along north side of Theobald Rd., six miles east-south-east of Anguilla; October 19, 2005; Collected by Bryce Burke & Chuck Walker; Identified by Chuck Walker; #MS10]

Saccharum ravennae (L.) L. ravennagrass [US; Illinois; Jackson County; 450 feet; T9S, R1W, S28; 37 deg. 42.745'N, 89 deg. 13.315'W; 450 feet][southeast corner of Agriculture building, Southern Illinois University; September 3, 2003; Collected by Chuck Walker; Identified by Richard Cole; #IL526]

Schedonorus pratensis (Huds.) Beauv. meadow fescue [US; Illinois; Jersey County; Grafton; T6N, R13W, S13; 420 feet][east end of Gilbert Lake, Two Rivers National Wildlife Refuge; June 18, 2000; Collected & identified by Chuck Walker; #IL12]

Schismus arabicus Nees Arabian schismus [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; #AZ450]

Schizachyrium scoparium (Michx.) Nash. little bluestem [US; Illinois; Calhoun County; Brussels; T13S, R1W, S16; 440 feet][15 m south of Staff Parking lot, Two Rivers National Wildlife Refuge; September 5, 2000; Collected & identified by Chuck Walker; #IL77]

Secale cereale L. cereal rye [US; California; Modoc County; T42N, R12E, S14; 41 deg. 28.608'N, 120 deg. 33.407'W; 4,360 feet][along dirt road between fence and railroad tracks, northwest quadrant of intersection of Road #60 (West St.) & railroad tracks; June 20, 2004; Collected & identified by Chuck Walker; #CA19]

Setaria faberi Herrm. Japanese bristlegrass [US; Iowa; Fremont County; Riverton; T68N, R41W, S18; 930 feet][along field, 50 m west of turnoff to Riverton Check Station, Riverton Wildlife Management Area; July 5, 1999; Collected & identified by Chuck Walker; #IA54]

Setaria italica (L.) Beauv. foxtail bristlegrass [US; Illinois; Calhoun County; Brussels; T13S, R1W, S16; 420 feet][along road between Moist Soil Unit 1 and Upper Calhoun Moist Soil Unit (#5), Two Rivers National Wildlife Refuge; July 9, 2000; Collected & identified by Chuck Walker; #IL29]

Setaria leucopila (Scribn. & Merr.) K. Schum. streambed bristlegrass [US; Arizona; Yavapai County; Bagdad; T14N, R9W, S11; 3,820 feet][hillside, near Hilltop Dr.-Lindahl Rd. intersection; August 4, 1996; Collected & identified by Chuck Walker; #AZ349]

Setaria magna Griseb. giant bristlegrass [US; Florida; Dade County; Florida City; T57S, R39E, S25; 5 feet][west side of road by billboard sign, 800 m south of US 1-SW 344th St. intersection; December 19, 1997; Collected & identified by Chuck Walker; #FL03]

Setaria verticillata (L.) Beauv. hooked bristlegrass [US; Arizona; Yavapai County; Prescott; T13N, R2W, S4; 5,360 feet][side of building at 323 S. Montezuma St.; August 21, 1996; Collected & identified by Chuck Walker; #AZ376]

Setaria viridis (L.) Beauv. green bristlegrass [US; Arizona; Yavapai County; Prescott; T13N, R2W, S4; 5,360 feet][northwest quadrant of S. Cortez St.-Carleton St. intersection; June 19, 1996; Collected & identified by Chuck Walker; #AZ318]

Sorghastrum nutans (L.) Nash Indiangrass [US; Iowa; Fremont County; T68N, R42W, S29; 1,250 feet][on hill, 10 m north of Main Observation Point, Waubonsie State Park; August 29, 1999; Collected & identified by Chuck Walker; #IA121]

Sorghum bicolor (L.) Moench sorghum [US; Iowa; Fremont County; Riverton; T68N, R41W, S18; 940 feet][along Rd. #313, 3rd curve north of the turn-off to Riverton Check Station, Riverton Wildlife Management Area; August 5, 1999; Collected & identified by Chuck Walker; #IA89]

Sorghum bicolor (L.) Moench ssp. bicolor grain sorghum [US; Mississippi; Washington County; Leland; 33 deg. 21.464'N, 90 deg. 52.278'W; T18N, R7W, S36; 109 feet][agricultural field on the west side of Highway 61, three miles south of Highway 82; November 1, 2007; Collected & identified by Bryce Burke & Chuck Walker; #MS132]

Sorghum halepense (L.) Pers. Johnsongrass [US; Arizona; Yavapai County; Prescott; T14N, R2W, S34; 5,300 feet][east side of Highway 89 between mile markers 313 and 314; July 16, 1996; Collected & identified by Chuck Walker; #AZ334]

Spartina alterniflora Loisel. smooth cordgrass [US; Louisiana; Calcasieu Parish; T9S, R8W, S16; 15 feet][20 m south of the English Bayou, 5 m west of bridge on Highway 171; April 20, 2000; Collected & identified by Chuck Walker; #LA265]

Spartina patens (Ait.) Muhl. saltmeadow cordgrass [US; Louisiana; Cameron Parish; Grand Lake; T12S, R8W, S17; 10 feet][along dirt road heading east from Highway 385, 0.3 miles north of Grand Lake; October 14, 1994; Collected & identified by Dr. James Brooks & Chuck Walker; #LA174]

Spartina pectinata Bosc ex Link prairie cordgrass [US; Iowa; Fremont County; T68N, R42W, S29; 1,200 feet][south side of Highway 2, between entranceways to Equestrian Area and Waubonsie State Park; September 6, 1999; Collected & identified by Chuck Walker; #IA134]

Sphenopholis obtusata (Michx.) Scribn. prairie wedgescale [US; Mississippi; Washington County; T19N, R7W, S27; 120 feet][along south side of road in Delta Experimental Forest, about three miles north of Stoneville; April 27, 2006; Collected & identified by Danny Skojac & Chuck Walker; #MS84]

Sporobolus compositus (Poir.) Merr. var. compositus composite dropseed [US; Arizona; Coconino County; T44S, R1W, S23; 4,220 feet][Paria River Canyon, 3.5 miles south of Highway 89 (thirteen miles west of Big Water, Utah; April 23, 1997; Collected & identified by Chuck Walker; #AZ439]

Sporobolus contractus A.S. Hitchc. spike dropseed [US; Arizona; Yavapai County; Prescott; T14N, R2W, S20; 5,580 feet][along Estrella Rd., 20 m north of its intersection with Linda Vista Lane; July 4, 1996; Collected & identified by Chuck Walker; #AZ326]

Sporobolus cryptandrus (Torr.) Gray sand dropseed [US; Illinois; Jackson County; Grand Tower; T10S, R2W, S23; 37 deg. 38.493'N, 89 deg. 30.856'W; 340 feet][growing in sand along the east side of the Mississippi River, 10 m northwest of Grand Tower Campground and Picnic Area, Devil's Backbone Park; September 15, 2002; Collected by Chuck Walker; Identified by Mike Mibb; #IL434]

Sporobolus domingensis (Trin.) Kunth coral dropseed [US; Florida; Broward County; Fort Lauderdale; T50S, R42E, S10; 5 feet][south side of 900 block of W. Broward Blvd.; January 9, 1998; Collected & identified by Chuck Walker; #FL77]

Sporobolus flexuosus (Thurb. ex Vasey) Rydb. mesa dropseed [US; Arizona; Graham County; T9S, R26E, S5; 3,330 feet][along Highway 191, one mile south of its junction with Highway 266; May 21, 1996; Collected & identified by Chuck Walker; #AZ293]

Sporobolus indicus (L.) R.Br. smut grass [US; Louisiana; Calcasieu Parish; Lake Charles; T10S, R8W, S19; 15 feet][vacant lot west of Ryan St., west of Frasch Hall, McNeese State University; October 12, 1994; Collected by Dr. James Brooks & Chuck Walker; #LA170]

Stenotaphrum secundatum (Walt.) Kuntze St. Augustine grass [US; Louisiana; Calcasieu Parish; DeQuincy; T7S, R11W, S27; 70 feet][front lawn of Temple Inland Forest Products, 3441 Highway 12; September 3, 1997; Collected & identified by Chuck Walker; #LA202]

Taeniatherum caput-medusae (L.) Nevski medusahead [US; California; Modoc County; T42N, R12E, S14; 41 deg. 28.608'N, 120 deg. 33.407'W; 4,360 feet][along dirt road between fence and railroad tracks, northwest quadrant of intersection of Road #60 (West St.) & railroad tracks; June 20, 2004; Collected & identified by Chuck Walker; #CA20]

Thinopyrum intermedium (Host) Barkworth & D.R. Dewey intermediate wheatgrass [US; California; Modoc County; T42N, R12E, S11; 41 deg. 29.718'N, 120 deg. 33.175'W; 4,360 feet][along fence, behind the BLM Alturas Field Office; June 17, 2004; Collected & identified by Chuck Walker; #CA15]

Thinopyrum ponticum (Podp.) Z.-W. Liu & R.-C. Wang tall wheatgrass [US; California; Modoc County; T42N, R12E, S11; 41 deg. 29.755'N, 120 deg. 33.170'W; 4,400 feet][along northwest portion of fence, behind the Bureau of Land Mangaement Alturas Field Office; July 29, 2004; Collected by Chuck Walker; Identified by Mark Lowrey; #CA90]

Torreyochloa pallida (Torr.) Church var. pauciflora (J. Presl) J.I. Davis pale false mannagrass [US; California; Lassen County; T37N, R12E, S11; 41 deg. 03.333'N, 120 deg. 33.341'W; 5,400 feet][riparian area, Williams Allotment; August 4, 2004; Collected by Matt Minarchek & Chuck Walker; Identified by Mike Dolan; #CA93]

Tridens flavus (L.) A. S. Hitchc. purpletop tridens [US; Iowa; Fremont County; T68N, R42W, S32; 1,200 feet][southern/lower end of Campgrounds at the end of the pavement, Waubonsie State Park; September 5, 1999; Collected & identified by Chuck Walker; #IA130]

Triplasis purpurea (Walt.) Chapman purple sandgrass [US; Illinois; Jackson County; Grand Tower; T10S, R2W, S23; 37 deg. 38.388'N, 89 deg. 30.804'W; 340 feet][growing in sand along the east side of the Mississippi River, 10 m west of Grand Tower Campground and Picnic Area, Devil's Backbone Park; September 15, 2002; Collected by Chuck Walker; Identified by Mike Mibb; #IL435]

Tripsacum dactyloides (L.) L. eastern gamagrass [US; Illinois; Jackson County; Carbondale; T9S, R1W, S20; 37 deg. 42.976'N, 89 deg. 14.640'W; 410 feet][5 m north of Chautauqua St., Green Earth III Wetlands-old farm field planted with prairie grasses; July 8, 2002; Collected & identified by Dr. Mark A. Basinger & Chuck Walker; #IL350]

Triticum aestivum L. common wheat [US; Arizona; Yavapai County; Prescott; T13N, R2W, S4; 5,360 feet][in front of 321 S. Montezuma St.; June 24, 1996; Collected & identified by Chuck Walker; #AZ321]

Triticum aestivum L. common wheat (beardless form) [US; California; Modoc County; Alturas; T42N, R12E, S17; 41 deg. 28.900'N, 120 deg. 29.491'W; 4,360 feet] [along road, northwest side of Road 56 (Parker Creek Road); June 27, 2004; Collected & identified by Chuck Walker; #CA24]

Urochloa mutica (Forsk.) T. Q. Nguyen para grass [US; Florida; Monroe County; Key Colony; T65S, R33E, S33; 5 feet][along unpaved perimeter road on east side of Curry Hammocks; December 20, 1997; Collected & identified by Chuck Walker; #FL05]

Urochloa ramosa (L.) Nguyen dixie signalgrass [US; Mississippi; Washington County; Leland; T18N, R7W, S15; 33 deg. 24.742'N, 90 deg. 54.565'W; 125 feet] [widespread in agricultural field (appears to have been planted), east side of Experimental Farm Rd. near the east end of R. S. Power Rd.; September 27, 2008; Collected & identified by Chuck Walker; #MS165]

Ventenata dubia (Leers) Coss. North Africa grass [US; Washington; Spokane County; Spokane; T25N, R43E, S28; 2,300 feet][Lincoln Park; June 28, 1998; Collected & identified by Chuck Walker; #WA63]

Vulpia bromoides (L.) S.F. Gray brome fescue [US; California; Shasta County; T36N, R4E, S10; 40 deg. 59.50'N, 121 deg. 30.47'W; 2,860 feet][along perimeter of Pit River Campgrounds, about six miles northeast of Cassel; May 18, 2005; Collected & identified by Chuck Walker; #CA208]

Vulpia octoflora (Walt.) Rydb. var. octoflora sixweeks fescue [US; Mississippi; Washington County; Leland; T18N, R7W, S15; 33 deg. 24.72'N, 90 deg. 54.64'W ; 120 feet][west side of west bend of Deer Creek; March 26, 2006; Collected & identified by Chuck Walker; #MS87]

Zea mays L. corn [US; Illinois; Jackson County; Carbondale; T9S, R1W, S28; 450 feet][grown from seed, 1575 Logan Dr. (middle lot), Southern Hills; May 16, 2002; Collected & identified by Chuck Walker; #IL280]