531 
Bouteloua hirsuta Lag. Var. Cienc. y Litter. ii, pt. 4, 141 (1805). 
Prairies: Hot Springs, altitude 1,100 m., June 19 (No. 1135). 
Bouteloua oligostachya (Nutt.) Torr.; Gray, Man. ed, 2,553 (1856); Atheropogon 
oligostachyus Nutt. Gen. i, 78 (1818). 
Prairies: Hot Springs, altitude 1,100 m., June 1) (No. 1186). 
Bouteloua curtipendula (Mx.) Torr. in Emory, Mil. Recon. 153 (1848); Chloris 
curtipendula, Mx, Fl. i, 59 (1803). 
Rare: Hot Springs, altitude 1,100 m., June 1) (No, 1137). 
Bulbilis dactyloides (Nutt.) Raf.; Kuntze, Rev. Gen. Pl. ii, 763 (1891); Sesleria 
dactyloides Nutt. Gen. i, 65 (1818). 
Prairies: Hot Springs, altitude 1,100 m., June 13; on the French Creek, east of 
Custer, altitude 1,400 m., July 18 (No. 1158). 
Keeleria cristata (L.) Pers. Syn. i, 97 (1805); -tira cristata L. Sp. Pl. i, 65 (1753). 
Common: Hot Springs, altitude 1,100 m., June 13; Elk Canyon, altitude 1,200 m. | 
June 30; Lead City, altitude 1,700 m., July 9; Rochford, altitude 1,700 m., July 12 
(No. 1189). 
Eatonia pennsylvanica (DC.) Gray, Man. ed. 2, 558 (1856); Koleria pennsylvanica 
DC. Cat. Hort. Monsp. 117 (1813). ; 
Rare: Hot Springs, altitude 1,050 m., June 15 (No. 1140). 
Catabrosa aquatica (L.) Beauv. Agrost. 157 (1812); Aira aquatica L. Sp. Pl. i, 64 
(1753). 
In a swamp near Pringle, altitude 1,500 m., August 5 (No. 1141). 
Eragrostis major Host, Gram. Austr. iv, 14 (1809). 
Rare: Hot Springs, altitude 1,050 m., August 9 (No, 1142). 
Dactylis glomerata L. Sp. Pl. i, 71 (1753). 
Rare: Hot Springs, altitude 1,050 m., June 15 (No. 1143). 
Poa fendleriana (Steud.) Vasey, Il]. NX. A. Grasses, ii, 74 (1893); Eragrostis fend- 
leriana Steudel, Syn. Pl. Gram, 278 (1855). 
The panicle is more open than usual, and the glumes are very light in color and 
shining. It was growing in big tufts on the prairies south of Pringle, altitude 
1,500 m., August 5 (No. 1144). 
A few bunches with broader, flat leaves and greener flowers were found at Hot 
Springs, altitude 1,100 m., June 13 (No. 1145), 
Poa tenuifolia Buckley, Proc. Acad. Phila, 1862, 96 (1862). 
Of two forms collected, one is tall, 4 to 5 dm. high, with broader leaves. Elk 
Canyon, altitude 1,200 m., June 29; Hot Springs, altitude 1,100 m., August 3 (No. 
1146). Another form, referred to this species by Professor Scribner, is densely tufted, 
1 to 2 dm. high, scabrous; leaves 3 to 7 em, long, very narrow, soon involute, scab- 
rous; panicle 5 to 7 em, long, narrow, with short, upright branches. It differs from 
the typical form in size, in the narrow, scabrous leaves, the smaller and more rounded 
spikelets, and the broader glumes, Dry soil: Hot Springs, altitude 1,100 m., June 13 
(No. 1147). ° 
Poa nevadensis Vasey, Bull. Torr. Club, x, 66 (1883). 
On the railroad embankment above Custer, altitude 1,650 m., July 16 (No, 1148). 
Together with the more typical form, another was growing that had a very thick 
and dense panicle 10 to 15 em. long and over 2 em. wide, and large 5- to 8- flowered 
spikelets, about 1 cm. long, on a short pedicel (No, 1149). 
Poa annua L. Sp. Pl. i, 68 (1753). 
Rare: Elk Canyon, altitude 1,200 m., June 29 (No. 1150). 
Poa pseudopratensis! Scribner & Rydberg, sp. nov. PL. XX. 
Culms erect, 1 to 2 feet high from a creeping rootstock. Sheaths smooth or very 
1 The description of this species is drawn by Prof. F. Lamson-Scribner. 
