Achnatherum robustum (1996)
POACEAE
Achnatherum robustum (Vasey) Barkworth
U.S.A., Colorado, Park County: East-central Colorado: Mosquito Range to Plains: Thirtynine Mile Volcanic Range: along an unnamed tributary of Threemile Creek and surrounding uplands off Forest Road 108 ca 1.5 rd mi E of intersection with Colo Hwy 9, ca 9.2 air mi NW of Guffey.
In Douglas fir forest on north-facing slope with gravelly volcanic soils. Phenology: fruiting.
Accession: (unaccessioned)

Achnatherum robustum (2005)
POACEAE
Achnatherum robustum (Vasey) Barkworth
U.S.A., Arizona, Apache County: Apache National Forest: mesa on east side of Murray Basin, ca 2 air mi E of Flat Top, ca 4.5 air mi SE of Springerville.
Old ripped up section of highway with chunks of asphalt. Phenology: flowering & fruiting.
Accession: RM (unaccessioned)

Achnatherum robustum (2003)
POACEAE
Achnatherum robustum (Vasey) Barkworth
U.S.A., Colorado, Archuleta County: Eastern San Juan Mountains: Valle Seco and ridge S of the head of Frio Canyon, ca 9.5 air mi S of Pagosa Springs.
Grassy or sagebrush-grass flats. Phenology: flowering & fruiting.
Annotations:
1. Achnatherum robustum (Vasey) Barkworth
Annotated by Jeanette Flaig.
Accession: RM 797313

U.S.A., Colorado, Conejos County: Eastern San Juan Mountains: in The Canyon and adjacent areas on Forest Road 255 at the forest boundary, ca 12 air mi NW of Capulin; ca 15 air mi SSE of Monte Vista.
Above the canyon with areas of sandstone pavement, soil patches, and rocky areas, with scattered pinyon pine, juniper, isolated Douglas fir and ponderosa pine. Phenology: flowering & fruiting.
Annotations:
1. Achnatherum robustum (Vasey) Barkworth
Annotated by Jeanette Flaig.
Accession: RM 797312

U.S.A., Colorado, Rio Grande County: Eastern San Juan Mountains: Rio Grande National Forest: Alder Creek: U.S. Hwy 160 E to County Road 17, N to Forest Road 610; ca 2 .5 air mi N of South Fork.
Elev. 9189 ft.
Pinyon/juniper and ponderosa pine woodland. Phenology: flowering & fruiting.
Accession: RM 797314

U.S.A., Colorado, Archuleta County: Eastern San Juan Mountains: Turkey Mountain and to the W along Forest Road 651 at the northeast base of Eightmile Mesa, ca 7 air mi SSE of Pagosa Springs.
Meadow and openings in ponderosa pine/Rocky Mountain juniper/Gambels oak forest. Phenology: flowering & fruiting.
Annotations:
1. Achnatherum robustum (Vasey) Barkworth
Annotated by Jeanette Flaig.
Accession: RM (unaccessioned)

U.S.A., Colorado, Mineral County: Eastern San Juan Mountains: Rio Grande National Forest: E of Coller State Wildlife Area: NW of the overlook, side road off Colo Hwy 149, ca 9 air mi NNW of South Fork.
Elev. 8420 ft.
Ponderosa pine woodland with scattered aspen and Douglas fir beneath rock buttes on southwest-facing slope. Phenology: flowering & fruiting.
Accession: RM (unaccessioned)

U.S.A., Colorado, Mineral County: Eastern San Juan Mountains: Rio Grande National Forest: Deep Creek Trail, Trailhead 806 from Forest Road 528, ca 12 air mi S of Creede.
Open xeric meadow. Phenology: flowering & fruiting.

U.S.A., Arizona, Coconino County: Coconino National Forest: 2 air mi N of Saddle Mountain.
Base to top of cinder cone. Phenology: flowering & fruiting.
Annotated by B. E. Nelson.

U.S.A., New Mexico, Otero County: Cloudcroft.
Elev. 8700 ft.
Open pine woods community; distributed in large bunches. Phenology: flowering & fruiting.

U.S.A., New Mexico, Colfax County: NM Hwy 72, 4 road mi E of I-25 (milepost 4).
Grassy roadside. Phenology: fruiting.
Accession: RM 960786, Barcode: RM0216978

U.S.A., New Mexico, Colfax County: NM Hwy 72, 11 road mi E of I-25 (milepost 11).
Roadside through wooded area. Phenology: flowering & fruiting.
Accession: RM 960787, Barcode: RM0216979

U.S.A., New Mexico, Otero County: Lincoln National Forest: open park along Hwy through Mescalero Indian Reservation.
Park grass community in almost pure stand in deep clay loam soil on a 10 degree NW aspect; distributed in open parks, pine type; abundant. Determined by M L. Bombard. Phenology: fruiting.
Annotated by Jason R. Swallen.
Barnard A. Hendricks, 2092. 8/14/1936.
Accession: USFS 428913

U.S.A., Colorado, Jackson County: Sierra Madre\Park Range: Park Range: junction of Forest Roads 600 and 660 at northern end of Big Creek Lake, ca 22 air mi NW of Walden.
Salix dominated meadow.

U.S.A., New Mexico, Lincoln County: White Mountains.
Phenology: flowering & fruiting.
Annotated by C. L. Porter in 1980.
1.
Annotated by Mary E. Barkworth in 1980.

U.S.A., Colorado, Larimer County: Riparian Plants of the Cache la Poudre River: 1/4 mi upstream of bridge to Hewlett Gulch, ca 8 mi W of Teds Place on Colo Hwy 14.
T8N R71W S2
Riverbank with Populus angustifolia, Prunus virginiana.

U.S.A., New Mexico, Taos County: Carson National Forest and Vicinity: Sangre de Cristo Range: Rancho del Rio Grande Grant: along Rio Chiquito on Forest Road 437, ca 1.5 air mi W of Tombe; ca 4 air mi ESE of Ranchos de Taos.
Canyon bottom. Phenology: flowering & fruiting.
Accession: RM 945497, Barcode: RM0136667

U.S.A., New Mexico, Taos County: Carson National Forest and Vicinity: Sangre de Cristo Range: Eagle Nest Lake west shore, Eagle Nest Lake State Park main entrance from U.S. Hwy 64, ca 1 air mi S of Eagle Nest.
Lake shore and adjacent uplands. Phenology: flowering & fruiting.

U.S.A., New Mexico, Taos County: Carson National Forest and Vicinity: Sangre de Cristo Range: Valle de los Romeros W through Policarpio Canyon to Forest Road 76, Forest Trail 13, ca 4 air mi E of Tres Ritos.
Meadow with Iris missouriensis and Veratrum, forest with aspen and spruce. Phenology: flowering & fruiting.

U.S.A., New Mexico, Taos County: Carson National Forest and Vicinity: Rio Grande Gorge on southwest side of Ute Mountain.
Wash to canyon rim. Phenology: flowering.

U.S.A., New Mexico, Rio Arriba County: Carson National Forest and Vicinity: at the northeast base of San Antonio Mountain, ca 4 air mi NNE of the summit on Forest Road 118, ca 18 air mi N of Tres Piedras; ca 5.5 air mi S of Colorado.
Disturbed areas on clay flats and slopes with basalt boulders. Phenology: flowering.

U.S.A., New Mexico, Otero County: Cloudcroft: east slope of Thomason Canyon.
Phenology: vegetative only.
Annotated by Mary E. Barkworth in 1980.

U.S.A., New Mexico, Taos County: Carson National Forest and Vicinity: Sangre de Cristo Range: along Forest Road 161 above Alamitos Creek, ca 4 air mi E of Jicarita Peak, ca 25 air mi S of Taos.
Roadside and roadcut through sandstone. Phenology: flowering & fruiting.

U.S.A., New Mexico, Colfax County: Carson National Forest and Vicinity: Cimarron Range: Colin Neblett State Wildlife Area: Tolby Creek ca 1.5 air mi S of Cimarron Canyon and U.S. Hwy 64, ca 3 air mi ESE of Eagle Nest, ca 1.5 air mi E of east shore of Eagle Nest Lake.
Along creek with Alnus tenuifolia, Rosa, Rudbeckia laciniata var. ampla, and Rubus. Phenology: buds.

U.S.A., New Mexico, Colfax County: Carson National Forest and Vicinity: Eagle Nest Lake State Park: Moreno Day Use Area, on south side of U.S. Hwy 64, ca 3/4 air mi SSE fo Eagle Nest.
Along north shore of reservoir with Hordeum jubatum, Verbascum thapsis, and Cirsium arvense. Phenology: flowering & fruiting.

U.S.A., New Mexico, Taos County: Carson National Forest and Vicinity: Sangre de Cristo Range: San Cristobal Canyon Trailhead and along trail in canyon, ca 3 air mi NE of San Cristobal; ca 2 air mi SSE of Lama.
Old road bed near creek and riparian area lined with Alnus tenuifolia. Phenology: flowering & fruiting.

U.S.A., New Mexico, Taos County: Carson National Forest and Vicinity: Canada de los Comanches ca 1.5 air mi SE of Petaca Mesa, ca 2.5 air mi NE of Servilleta Plaza and ca 8 air mi NW of Taos Junction.
Pinyon/juniper woodland with large openings of Artemisia tridentata in canyon bottom and drainage areas; sandy soil and sedimentary rock outcrops. Phenology: fruiting.

U.S.A., New Mexico, Colfax County: Carson National Forest and Vicinity: Sangre de Cristo Range: Valle Vidal Unit: along Middle Ponil Creek S toward Greenwood Canyon from Forest Road 1910, ca 13 air mi E of Red River and ca 2 mi N of Forest Boundary.
Disturbed areas along road in stream drainage surrounded by ponderosa pine forest on west exposure and spruce/Abies concolor on east exposure. Phenology: flowering & fruiting.

U.S.A., New Mexico, Rio Arriba County: Carson National Forest and Vicinity: vicinity of Burns Lake, ca 1 air mi S of Trout Lakes, ca 8 air mi NNE of Canjilon.
Dry meadow with Stipa lettermanii and Orthocarpus luteus. Phenology: fruiting.

U.S.A., New Mexico, Rio Arriba County: Carson National Forest and Vicinity: Lopez Canyon off Forest Road 337, ca 3.5 air mi ESE of Canjilon.
Flats of clay/sand soils with Artemisia tridentata including groupings of Pinus edulis and juniper species. Phenology: flowering & fruiting.

U.S.A., New Mexico, Taos County: Carson National Forest and Vicinity: Sangre de Cristo Range: Gallegos Canyon Trail 4, on north side of NM Hwy 518, ca 0.5 air mi NW of Sipapu, ca 3 air mi NW of Tres Ritos.
Mixed conifer forest with Pinus ponderosa, Pseudotsuga menziesii and areas near trail head. Phenology: flowering & fruiting.

U.S.A., New Mexico, Colfax County: Carson National Forest and Vicinity: Cimarron Range: Colin Neblett State Wildlife Area: along Maverick Creek from U.S. Hwy 64, ca 0.5 air mi NE of Gravel Pit Lakes, ca 7 air mi E of Eagle Nest, ca 1.5 air mi W of Ute Park at area boundary.
Pinyon/juniper woodland with mixed conifers in drainage areas; old roads with Melilotus officinalis. Phenology: flowering & fruiting.

U.S.A., New Mexico, Taos County: Carson National Forest and Vicinity: cut and fill along old Chili Line Railroad Grade and adjacent roadside along U.S. 285.
Disturbed areas. Phenology: flowering & fruiting.

U.S.A., Colorado, Gunnison County: Southern Gunnison Basin: along south side of U.S. Hwy 50, just S of the cemetary, ca 1.6 road mi E of downtown Gunnison.
Roadside. Phenology: flowering & fruiting.

U.S.A., Colorado, Gunnison County: Southern Gunnison Basin: along south side of U.S. Hwy 50, ca 7 road mi E of intersection of U.S. Hwy 50 and Colo Hwy 114; ca 7.6 air mi SW of Lookout Mountain; ca 14.2 air mi ESE of Gunnison.
Roadside. Phenology: flowering & fruiting.

U.S.A., Colorado, Chaffe County: Sawatch Range: San Isabel National Forest: Raspberry Gulch, near Colorado Trail and County Road 273, ca 10 air mi S of Buena Vista; ca 14 air mi NW of Salida.
Open area in ponderosa pine. Phenology: fruiting.

U.S.A., New Mexico, Soccorro County: Lincoln National Forest: J. B. Evans pasture.
Hillside community with oak-brush and grasses in rocky soil on a SE aspect; scattering abundance.
Maurice J. Addison, AD-28. 9/2/1921.

U.S.A., Wyoming, Weston County: [location and coordinates withheld]
Dry, shaded uplands. Phenology: flowering.

U.S.A., Colorado, Larimer County: Roosevelt National Forest: Front Range: hillsides off Drake Trailhead on Glen Haven Road (County Road 43), ca 13 air mi W of Loveland.
Dry, open foothills with Ribes, Rhus, and Chrysothamnus, north facing slopes. Phenology: flowering & fruiting.

U.S.A., Wyoming, Albany County: 3 mi E of Laramie.
41.3068° N, 105.5299° W; NAD 83, uncertainty 1 mi., Digital Map
In sandy soil, roadside. Probably introduced from Colorado; 1st Wyo record. Phenology: fruiting.

U.S.A., New Mexico, Otero County: Sacramento Mountains: upper Russia Canyon ca 0.2 mi E of Hwy 64.
T16S R11E S24
Phenology: flowering & fruiting.

U.S.A., New Mexico, Sandoval County: Santa Fe National Forest and Vicinity: Jemez Mountains: NM Hwy 126 in Telephone Canyon, 12.5 air mi ESE of Cuba. SW for 0.6 air mi on NM Hwy 126 to seep, NE 1.3 air mi to Moon Spring; also returning to NM Hwy 126 via Forest Road 117.
Roadside through canyon bottom meadow. Phenology: flowering & fruiting.

U.S.A., New Mexico, San Miguel County: Santa Fe National Forest and Vicinity: Sangre de Cristo Mountains: Rio Mora, 2 air mi S of Cowles. NE 0.6 air mi along river on Trail 240 from parking lot in Mora River Campground.
Moist to dry canyon bottom. Phenology: flowering & fruiting.

U.S.A., New Mexico, Santa Fe County: Santa Fe National Forest and Vicinity: Sangre de Cristo Mountains: Dalton Canyon on Forest Road 123 branching W off the Pecos River, 6 air mi NNW of Pecos.
Wet to dry meadow and riparian with canyon constricting to the W. Phenology: flowering & fruiting.

U.S.A., New Mexico, Santa Fe County: Santa Fe National Forest and Vicinity: Sangre de Cristo Mountains: Rio Frijoles Trail 154 just E of Santo Domingo de Cundiyo Land Grant, 8 air mi SE of Chimayo. SE in canyon along trail for 0.2 air mi from E edge of land grant.
Riparian of river, and meadows, in canyon bottom with mixed conifer slopes. Canyon tightening upstream with encroachment of granitic cliffs. Phenology: flowering & fruiting.

U.S.A., New Mexico, Santa Fe County: Santa Fe National Forest and Vicinity: Sangre de Cristo Mountains: Pecos Wilderness: Frijoles Trail 154, W of the 154/150 trail junction and 11 air mi SE of Chimayo. NW on Trail 154 for 0.3 air mi.
Riparian and meadow of narrow canyon bottom with mixed conifer/mature aspen overstory. Granitic cliffs. Phenology: fruiting.

U.S.A., New Mexico, San Miquel County: Santa Fe National Forest and Vicinity: Sangre de Cristo Mountains: Indian Creek off of NM Hwy 63, 9 air mi N of Pecos. SE on road along creek ca 0.8 air mi.
Meadow and drainage in canyon bottom. Phenology: fruiting.

U.S.A., New Mexico, Sandoval County: Santa Fe National Forest and Vicinity: Jemez Mountains: NM Hwy 126, 1.2 road mi from Forest Road 20, Telephone Canyon.
Grassy valley. Phenology: flowering & fruiting.

U.S.A., New Mexico, Santa Fe County: Santa Fe National Forest and Vicinity: Sangre de Cristo Mountains: Glorieta Canyon S 1 air mi, 3 air mi N of Glorieta.
Trailside through riparian canyon bottom in Pseudotsuga/Abies forest. Phenology: flowering.

U.S.A., New Mexico, Santa Fe County: Santa Fe National Forest and Vicinity: Sangre de Cristo Mountains: Tesuque Creek on Winsor Trail 254, 3 air mi SE of Tesuque. N35.745 W105.888 SW 0.5 air mi on trail to N35.743 W105.896.
Narrow canyon bottom and riparian with mature ponderosa pine, horsetail, cottonwood, alder, and willow. Granitic soils. Phenology: flowering.

U.S.A., New Mexico, San Miguel County: Santa Fe National Forest and Vicinity: Sangre de Cristo Mountains: Pecos Wilderness: Pecos River W of Albright Creek, 2.5 air mi NE of Cowles; in vicinity of bridge.
Trailside through grassy canyon bottom below south-facing canyon slope of ponderosa pine and thick Gambels oak. Phenology: flowering & fruiting.

U.S.A., New Mexico, Santa Fe County: Santa Fe National Forest and Vicinity: Sangre de Cristo Mountains: Rio en Medio Trail 163, 4.5 air mi NE of Tesuque. N35.819 W105.864 W 0.4 air mi to juntion with Trail 179 at N35.818 W105.871.
Trailside through canyon bottom in ponderosa pine forest. Phenology: flowering & fruiting.

U.S.A., New Mexico, Santa Fe County: Santa Fe National Forest and Vicinity: Sangre de Cristo Mountains: Forest Road 102 through Pacheco Canyon, 5 air mi ENE of Tesque.
Roadside and south-facing gravel slope of granite in canyon bottom of ponderosa pine; on granite bluff. Phenology: flowering.

U.S.A., New Mexico, San Miguel County: Santa Fe National Forest and Vicinity: Sangre de Cristo Mountains: Pecos Wilderness: Rio Valdez Trail 224 at Mora Flats, 6.5 air mi NE of Cowles, at junction with Trail 250.
Meadow bottom in spruce forest with mature aspen. Phenology: flowering.

U.S.A., New Mexico, San Miguel County: Santa Fe National Forest and Vicinity: Sangre de Cristo Mountains: Valle Largo Trail 248, 2.5 air mi NE of Cowles; above Rio Mora from trailside fenced seep 0.3 air mi to W.
Over ridge of mixed conifers and along east-facing open meadow slope with Gambels oak thickets and scatttered conifers, mostly encroaching ponderosa pine. Phenology: flowering & fruiting.

U.S.A., New Mexico, Mora County: Santa Fe National Forest and Vicinity: Sangre de Cristo Mountains: Capulin Canyon, 2.5 air mi SW of Ledoux. N35.8998 W105.3854 at beginning of drainage NW 0.5 air mi down drainage to N35.9048 W105.3920 in canyon bottom.
Steep drainage on densely forested slope of mixed conifers, opening up below on more gradual slope towards canyon bottom. Phenology: flowering & fruiting.

U.S.A., New Mexico, Mora County: Santa Fe National Forest and Vicinity: Sangre de Cristo Mountains: Canoncito Creek on Forest Road 113, 2.5 air mi due W of Holman. NW 0.2 air mi on road before its departure from creek.
Roadside including riparian and lower banks of drainage in mixed conifer forest. Phenology: flowering.

U.S.A., New Mexico, Mora County: [location and coordinates withheld]
Roadside in meadow bottom including lower, south-facing slope of Gambels oak/ pinyon pine, and riparian at creek crossing; ponderosa pine forest. Phenology: flowering & fruiting.

U.S.A., New Mexico, Sandoval County: Santa Fe National Forest and Vicinity: Sierra Nacimiento: Joaquin Canyon on the north side of Mesa Venado, ca 0.5 air mi W of Rio Guadalupe, ca 6 air mi W Jemez Springs; ca 19.5 air mi SSE of Cuba.
Clearing in pinyon/juniper forest. Phenology: flowering & fruiting.

U.S.A., Wyoming, Laramie County: F. E. Warren Air Force Base: along Crow Creek.
T14N R67W S27
Dry meadow. Phenology: fruiting.
with J. Von Loh

U.S.A., Wyoming, Albany County: Laramie.
Vacant lot. Phenology: fruiting.
Gregory P. Hallsten, 359. 8/4/1982.

U.S.A., Wyoming, Platte County: Along Cottonwood Creek, 30 road mi NW of Wheatland.
Elev. 1616 m.
Hay meadow, irrigated when water in creek. Phenology: flowering & fruiting.

U.S.A., Wyoming, Albany County: Along U.S. Hwy 30-287, ca 0.5 mi N of Wyoming Technical Institute.
T16N R73W S17
Roadside. Phenology: fruiting.

U.S.A., Wyoming, Laramie County: 3 mi W of Cheyenne.
Grassy bank, with Glycyrrhiza and Elymus. Phenology: fruiting.

U.S.A., New Mexico, Otero County: Mesacalera Indian Reservation; along highway through reservation.
Phenology: fruiting.
Barnard A. Hendricks, 2092. 8/14/1936.
Accession: RMRS (unaccessioned)

U.S.A., New Mexico, Taos County:
Phenology: fruiting.
Accession: RMRS (unaccessioned)

Achnatherum robustum ()
U.S.A., no state, no county County:
Phenology: fruiting.
no collector, 602. //.
Accession: RMRS (unaccessioned)

U.S.A., Colorado, Teller County: 6 mi N of Woodland Park.
Pine forest in humus. Phenology: flowering & fruiting.
Annotated by Mary E. Barkworth in 1980.
1.
Annotated by Agnes B. Chase in 1980.

U.S.A., Colorado, Teller County: 6 mi N of Woodland Park.
Ponderosa pine woodland in rich humus. Phenology: fruiting.
Annotated by Jason R. Swallen.
Accession: USFS 428907

U.S.A., Colorado, Las Animas County: Duling Park: 3.5 mi WNW of Stonewall Gap and Colo Hwy 12.
T33S R69W
Grassland surrounded by Populus tremuloides and mixed conifer with Poa and Danthonia. Phenology: flowering & fruiting.

U.S.A., Colorado, Rio Grande County: Rio Grande National Forest: South Fork Guard Station: 50 m W of cabin.
T39N R3E S9 NW1/4 of SE1/4
Chrysothamnus community in sandy clay loam on 4% slope in northwest aspect. Phenology: fruiting.

U.S.A., Colorado, Archulata County: Pagosa Springs.
Phenology: flowering & fruiting.

U.S.A., Colorado, Archulata County: Pagosa Springs.

U.S.A., New Mexico, Colfax County: Between Raton and Springer.

U.S.A., Colorado, Clear Creek County: Idaho Springs.

U.S.A., Colorado, Larimer County: Foothills: 6 to 8 mi W of Fort Collins.

U.S.A., Colorado, Larimer County: Foothills.
Dry valleys. Phenology: flowering & fruiting.
with Cowen

U.S.A., New Mexico, Taos County: Taos.
Roadside. Phenology: fruiting.

U.S.A., Colorado, Archulata County: Peidra Creek.

U.S.A., Colorado, El Paso County: Pikes Peak Region.
Ed C. Schneider, 34. //1910.

U.S.A., Colorado, El Paso County: Manitou.
Elev. 2100 m.
with E. S. Clements

U.S.A., New Mexico, Rio Arriba/Sandoval County: Santa Fe National Forest: Borrego Ranger Station.
Common in park on 20% east slope in shallow loam. Phenology: flowering & fruiting.
Frederic G. Renner, 569. 7/3/1922.
Accession: USFS 428903

U.S.A., Colorado, Las Animas County: Trinidad.
Florence Beckwith, 26. 8//1917.

U.S.A., Colorado, Gilpin County: Modern.
Also in Boulder County. Phenology: flowering & fruiting.

U.S.A., Colorado, Larimer County: W of Loveland.
Mountains. Phenology: fruiting.

U.S.A., Colorado, Wed County: New Windsor.

U.S.A., Colorado, Weld County: New Windsor.

U.S.A., Colorado, Wed County: Windsor: W by railroad.
Along railroad. Phenology: flowering & fruiting.
George E. Osterhout, 7958. 7/5/1933.

U.S.A., New Mexico, Union County: 10 mi E of Folsom.
Damp soil. Phenology: fruiting.

U.S.A., Colorado, El Paso County: 10 mi E of Colorado Springs on Colo Hwy 94.
Grasslands. Phenology: fruiting.
with C. M. Iltis

U.S.A., New Mexico, Sandoval County: Santa Fe National Forest: Encino Ranger Station: pasture.
Infrequent on level slope in deep black alluvial loam. Phenology: flowering & fruiting.

U.S.A., Colorado, Archulata County: Piedra: along Piedra River; NW of Pargin house.
Along river. Phenology: flowering & fruiting.
1.
Annotated by Agnes B. Chase in 1980.

U.S.A., Colorado, El Paso County: Pikes Peak Region.
Open sandstone slopes. Phenology: fruiting.

Achnatherum robustum ()
U.S.A., Colorado, no county County: Pike National Forest: South Platte Burn.
Abundant in open grassland in coarse clay. Phenology: fruiting.

U.S.A., Colorado, Jefferson County: Arapaho National Forest: Evergreen: Cubcreek.
Grassland. Phenology: flowering & fruiting.
John Rundgren, sn. 7/27/1956.

U.S.A., New Mexico, San Miguel County: Santa Fe National Forest: Panchuela Ranger Station.
Open rolling southwest slope in black loam. Phenology: fruiting.

U.S.A., New Mexico, Rio Arriba County: Cow Creek Ranger Station.
Infrequent in dry meadow on deep gravelly loam. Also in San Miguel County? Phenology: fruiting.

U.S.A., Colorado, Chaffee County: Leadville National Forest: Cottonwood Hot Springs.
Abundant in grassy bottomland on east slope in moist sandy loam. Phenology: fruiting.

U.S.A., Colorado, Teller County: 1 mi E of Florissant; along Colo Hwy 24.
Elev. 2500 m.
In gravelly sand with Pinus and Bromus. Phenology: fruiting.

U.S.A., Colorado, Larimer County: W of Soldier Canon.
Gulch. Phenology: fruiting.

U.S.A., Colorado, Larimer County: Poudre Canyon.

U.S.A., New Mexico, Colfax County: Philmont Scout Ranch, near Cimarron: Urraca Mesa.
Common on open grassy southeast slope. Phenology: flowering & fruiting.

U.S.A., New Mexico, Colfax County: Philmont Scout Ranch, near Cimarron: Stone Wall Pass.
Common in meadow. Phenology: flowering & fruiting.

U.S.A., Colorado, El Paso County: Pike National Forest: Manitou Park.
Dry meadow. Phenology: flowering & fruiting.
Annotated by Jason R. Swallen.
William M. Johnson, WJ-45. 7/10/1936.

U.S.A., Colorado, Larimer County: Eastern foothills of Colorado Front Range: adjacent to KOA Campground and U.S. Hwy 287, ca 12 air mi N of Fort Collins.
Open canopy blue grama/needle and thread shortgrass grassland and slopes. Phenology: flowering & fruiting.

U.S.A., Wyoming, Laramie County: Laramie Range: Granite Reservoir: ca 15 air mi E of Laramie.
Southwest facing granite outcrops. Phenology: fruiting.
Annotated by Stuart Markow.

U.S.A., Wyoming, Albany County: Laramie Plains: Centennial Valley, ca 6.5 air mi SE of Centennial, ca 27 air mi WSW of Laramie.
Roadside. Phenology: flowering.
with Ronald L. Hartman

U.S.A., Wyoming, Laramie County: [location and coordinates withheld]
Disturbed areas along railroad. Phenology: flowering & fruiting.

U.S.A., Wyoming, Laramie County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: north end of Cheyenne at Wyo Hwy 211 and I-25 interchange.
Plains and roadside. Phenology: flowering & fruiting.

U.S.A., Wyoming, Weston County:
Roadside, with Dyssodia , Grindelia. Phenology: fruiting.

U.S.A., Colorado, Las Animas County: Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: at base of TV Hill, ca 1.5 mi N on County Road 63.1 from Exit 30 on I-25.
Pinyon-juniper/prairie transition. Phenology: flowering & fruiting.

U.S.A., Colorado, Saguache County: Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: San Luis Valley: ca 0.5 mi from County Road LL-56 up BLM road to Kelly Creek; W of Villa Grove; S of Poncha Springs. Center of section 9.
Prairie. Phenology: flowering & fruiting.

U.S.A., Colorado, Las Animas County: Comanche National Grassland: junction of U.S. Hwy 160 and the Villegreen Road, ca 9.5 ai WSW of Kim; 6 mi S of Villegreen.
Roadside in shortgrass prairie. Phenology: flowering & fruiting.
Annotated by Bernadette Kuhn.

U.S.A., Colorado, Custer County: Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Wet Mountain Valley: in the valley from the parking lot at the end of County Road 120 to the edge of the forest, S of Westcliffe.
Pasture-grassland. Phenology: flowering & fruiting.

U.S.A., Colorado, Las Animas County: Comanche National Grassland: near the head of Poitrey Creek ca 2 air mi W of Fallas Mesa, ca 7 air mi S of Villegreen.
Pasture dominated by Buchloë dactyloides; at stock tank overflow area. Phenology: flowering & fruiting.
Annotated by Bernadette Kuhn.

U.S.A., Colorado, Las Animas County: Comanche National Grassland: at Tobe Well off County Road 26, ca 9 air mi S of Villegreen; ca 10.5 air mi SW of Kim.
Weedy roadside with one Ulmus americana. Phenology: flowering & fruiting.
Annotated by Bernadette Kuhn.

U.S.A., New Mexico, Colfax County: Vermejo Park Ranch: in mouth of Encinosa Canyon ca 0.9 air mi NW of U.S. Hwy 64; 3.5 air mi NE of Cimarron.
Old cattle feeding and watering area among scrub oak and pinyon pine; highly disturbed. Stems tufted; common. Phenology: flowering.
Annotated by Ben Legler on 10/18/2008.

U.S.A., New Mexico, Colfax County: Vermejo Park Ranch: flats around small pond on ridgeline between Caliente Canyon and East Fork Chimney Canyon, 8 air mi ENE of Casa Grande and 1.5 air mi S of NM Hwy 555.
Open Pinus ponderosa woodland with grassy understory dominated by Festuca arizonica, Hymenoxyx richardsonii, shrubby Quercus gambelii. In large tufts; occasional on mound of disturbed soil near pond. Phenology: flowering.
Annotated by Ben Legler on 10/18/2008.

U.S.A., Colorado, Las Animas County: Vermejo Park Ranch: in Long Canyon 0.65 air mi N of mouth of Joe Baker Canyon; 1.1 air mi N of New Mexico and 15 air mi SW of Raton.
Rocky bar adjacent to flowing stream, with Verbascum thapsus, Ambrosia, Ratibida columnifera, grasses. Tufted; frequent on stream bar. Phenology: flowering.
Annotated by Ben Legler on 10/19/2008.

U.S.A., New Mexico, Colfax County: Vermejo Park Ranch: along Dillon Canyon Road (NM Hwy 476) opposite mouth of Gardiner Canyon, on southwest side of golf course on southwest side of Raton.
Dry weedy road shoulders, with Helianthus annuus, Ericameria nauseosa, grasses. Tufted; frequent on road shoulder. Phenology: flowering.

U.S.A., New Mexico, Colfax County: Vermejo Park Ranch: along Crow Canyon Road 6.1 air mi NW of Koehler townsite and 3.2 road mi up canyon from mouth of Little Crow Canyon.
Open Pinus ponderosa forest on southwest-facing slope, with Hymenoxys richardsonii, Heterotheca villosa, grasses, scattered Quercus ×undulata. Stems scattered; uncommon. Phenology: flowering.

U.S.A., New Mexico, Colfax County: Vermejo Park Ranch: along Crow Canyon Road 0.4 air mi SE of Koehler townsite.
Old coal mine spoils, sparsely vegetated with Ambrosia acanthicarpa, Ericameria nauseosa, numerous grass species. Tufted; uncommon. Phenology: fruiting.

U.S.A., New Mexico, Colfax County: Vermejo Park Ranch: roadside along Vermejo River at mouth of Gachupin Canyon; 9.3 air mi SE of Casa Grande.
Dry weedy roadside with Kochia scoparia, Ambrosia acanthicarpa, Chenopodium spp., grasses. Tufted; occasional. Phenology: fruiting.

U.S.A., New Mexico, Colfax County: Vermejo Park Ranch: small dirt road at west end of Vermejo Park, south side of Vermejo River 1.5 air mi WNW of Casa Grande.
Weedy roadside and adjacent grassland, silty soil, with Ambrosia acanthicarpa, Amaranthus powellii, Bidens tenuisecta, grasses. Tufted; occasional. Phenology: flowering.

U.S.A., Colorado, Custer County: [location and coordinates withheld]
Roadside. Phenology: flowering & fruiting.

U.S.A., Colorado, Las Animas County: Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: on Colo Hwy 160, ca 0.5 mi E of junction with Colo Hwy 350. Center of section.
Prairie. Phenology: flowering & fruiting.

U.S.A., New Mexico, Colfax County: Vermejo Park Ranch: along Rock Creek 1.8 air mi NW of Castle Rock and 5.5 air mi W of Casa Grande.
Small flowing stream with marshy borders of Juncus balticus, Mentha arvensis, and Agrostis giganea; bordered by dry grassland and slopes of Pinus ponderosa. Tufted; occasional along stream. Specimen GPS: 36.894238, -105.080254. Phenology: flowering.

U.S.A., Colorado, Las Animas County: Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: on Colo Hwy 389 S of Branson at the New Mexico state line.
Quercus. Phenology: flowering & fruiting.

U.S.A., New Mexico, Colfax County: Vermejo Park Ranch: along north side of the Vermejo River 0.9 air mi E of I-25; 3.2 air mi SSW of Maxwell.
Gravelly, gently sloping shortgrass prairie, with Psoralidium tenuiflorum, Chenopodium incanum, Bouteloua gracilis, and Yucca intermedia. In small tufts; locally common in small depression. Photographed. Specimen GPS: 36.492424, -104.556396. Phenology: flowering.

U.S.A., Colorado, Las Animas County: Vermejo Park Ranch: in Right Hand Fork Martinez Canyon 1/2 air mi up canyon from junction with Left Hand Fork Martinez Canyon; 17.7 air mi WSW of Trinidad.
Canyon-bottom grassland; deep fine soil, with Ratibida columnifera, Bouteloua gracilis, Verbascum thapsus, Verbena macdougalii, and Chenopodium. Forming large dense tufts; occasional. Specimen GPS: 37.034672, -104.736717. Phenology: flowering.

U.S.A., New Mexico, Colfax County: Vermejo Park Ranch: ridge between Gachupin Canyon and the Vermejo River 2.6 air mi NW of mouth of Gachupin Canyon.
Revegetated coal strip mine among hills dominated by Pinus edulis; mine surface dominated by Atriplex canescens var. canescens, Salsola spp., and Bouteloua gracilis. Inflorescences arching; stems in small tufts; uncommon. Specimen GPS: 36.804714, -104.899918. Phenology: flowering.

U.S.A., Montana, Gallatin County: Gallatin Range: Gallatin National Forest: the saddle between the Portal and Tamphery creeks on Forest Road 6959, ca 6 air mi NE of intersection of U.S. Hwy 191 and Mont Hwy 64 (Big Sky), ca 25.8-26 air mi SSW of Bozeman.
Open slopes and ridge. Phenology: fruiting.
Accession: RM 871838, Barcode: USFS0064675

U.S.A., Wyoming, Albany County: Laramie Plains: right-of-way along west side of U.S. Hwy 287 and Grant Creek, ca 1.5 air mi SE of Tie Siding; ca 18 air mi S of Laramie.
Plains in right-of-way. Phenology: fruiting.

U.S.A., New Mexico, Union County: 1 mi out of Clayton State Park on NM Hwy 455.
Roadside ditch. Phenology: flowering & fruiting.
Michael Schiebout, 1235. 7/21/2004.

U.S.A., Colorado, Pueblo County: Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Colo Hwy 78, ca 11 air mi SW of Pueblo (city center).
Calcareous roadcut in grassland. Phenology: flowering & fruiting.
Annotated by Brian Elliott.

U.S.A., Colorado, Pueblo County: Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: I-25 just N of Scroggs Arroyo.
Grassland and pinyon-juniper. Phenology: flowering & fruiting.
Annotated by Brian Elliott.
with Brian Elliott

U.S.A., Colorado, Las Animas County: Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Culebra Range: Colo Hwy 12 at Romain Canyon, ca 2.3 road mi S of Monument Lake.
Annotated by Brian Elliott.

U.S.A., Colorado, Pueblo County: Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Colorado City, Colo Hwy 165 N of Greenhorn Meadow Park.
Roadside, road cut, and field. Phenology: flowering & fruiting.
with Craig Freeman

U.S.A., Colorado, Fremont County: Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Sangre de Cristo Range: McCoy Gulch, ca 3.2 air mi S of Cotopaxi.
Oak-pinyon-juniper woodland and openings. Phenology: flowering & fruiting.

U.S.A., Colorado, Pueblo County: Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Wet Mountains: Colo Hwy 165, ca 4 air mi NW of Rye, at the YMCA Camp.
On a 1 year old burn in Pinus ponderosa. Phenology: flowering & fruiting.

U.S.A., Colorado, Pueblo County: Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: on Colo Hwy 96 at the junction of Siloam Road, ca 6 air mi E of Wetmore.
Roadside and grassland. Phenology: flowering & fruiting.
with Elizabeth Mark

U.S.A., Colorado, Eagle County: Gore Range: White River National Forest: McPhee Gulch, ca 4 air mi NE of State Bridge.
Dry slopes and meadows with sagebrush and pinyon-juniper. Phenology: flowering & fruiting.
Michael K. Kirkpatrick, 6218. 6/19/2011.
Accession: USFS 898059, Barcode: USFS0059684

U.S.A., Colorado, Grand County: Blue Valley Ranch.
40.0028° N, 106.37249° W; NAD 83, uncertainty 1 mi., Nat. Geog. TOPO!
Cynthia Villa, 68CV. //.

U.S.A., Colorado, Grand County: Blue Valley Ranch.
40.0028° N, 106.37249° W; NAD 83, uncertainty 1 mi., Nat. Geog. TOPO!
Cynthia Villa, 69CV. //.

U.S.A., Colorado, Huerfano County: Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Wet Mountains: Ideal Canyon, County Road 330, ca 7 air mi S of Walsenburg.
Pinyon-juniper woodland. Phenology: flowering & fruiting.

U.S.A., Colorado, Fremont County: Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Colo Hwy 67, 5.5 air mi S of Florence.
Grassland with some pinyon pine and juniper. Phenology: flowering & fruiting.

U.S.A., Colorado, Saguache County: Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: San Luis Valley: County Road NN56, 3 air mi NW of Villa Grove.
Open grassland and roadside. Phenology: flowering & fruiting.

U.S.A., Colorado, Saguache County: Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: San Luis Valley: Rattlesnake Hill, 4 mi E of Saguache.
Volcanic outcrops and roadside. Phenology: flowering & fruiting.

U.S.A., New Mexico, Colfax County: Eagle Nest Lake at rest stop at north-northeast corner of lake after switchback on U.S. Hwy 64, W of the dam, ca 1 air mi SE of Eagle Nest.
Receding shoreline (down 30-40 ft). Phenology: fruiting.
Annotated by B. E. Nelson.

U.S.A., Colorado, Eagle County: Gore Range: White River National Forest: McPhee Gulch, ca 4 air mi NE of State Bridge.
Dry slopes and meadows with sagebrush and pinyon-juniper. Phenology: flowering & fruiting.
Michael K. Kirkpatrick, 6218. 6/19/2011.
Accession: USFS (unaccessioned), Barcode: USFS0060962

U.S.A., Colorado, Pueblo County: East-central Colorado: Mosquito Range to Plains: Great Plains: along Meridian Road or County Road 501 ca 0.3 mi S of El Paso County, ca 1.5 air mi E of Henkel; ca 18 air mi N of Pueblo.
In a moist swale in a cholla grassland with fine soils. Phenology: flowering.
Accession: (unaccessioned)

U.S.A., Colorado, Fremont County: East-central Colorado: Mosquito Range to Plains: Arkansas River Drainage: Beaver Creek State Wildlife Area: along Beaver Creek and adjacent meadows, ridges and gulches off County Road 132 at terminus, ca 15 air mi NE of Canon City.
Open meadow with stands of juniper and Gambel's oak. Phenology: flowering.
Accession: (unaccessioned)