WOOTON AND STANDLEY—FLORA OF NEW MEXICO, 81 
New Mexico: Horsethief Canyon (Standley 4880). Meadows, in the Canadian 
Zone. 
2. Danthonia parryi Scribn. Bot. Gaz. 21: 133. 1896. 
TYPE Loca.iry: Colorado. 
RANGE: Colorado and New Mexico. 
New Mexico: Grass Mountain (Standley 4371). Meadows, in the Canadian Zone. 
3. Danthonia spicata (L.) Beauv.; Roem. & Schult. Syst. Veg. 2: 690. 1817. 
Avena spicata L. Sp. Pl. 80. 1753. 
Type Locauiry: ‘‘Habitat in Pennsylvania.”’ 
RancGE: British America to New Mexico, Louisiana, and North Carolina. 
New Mexico: Harveys Upper Ranch; West Fork of the Gila. Damp woods, in the 
Canadian Zone, 
39. AVENA L. Oars. 
Annuals or perennials with rather large spikelets variously paniculate; spikelets 2 
to 6-flowered; rachilla jointed above the glumes, bearded below the lemmas; glumes 
2, unequal, membranaceous, longer than the lemmas, these rounded on the back, 5 to 
9-nerved, often bidentate at the apex, with a long dorsal twisted awn; grain pubes- 
cent, at least at the apex, frequently adherent to the lemma or palea, 
KEY TO THE SPECIES, 
Glumes shorter than the lemmas; panicles lax, somewhat nodding; 
lemmas hairy at the base...............-2-2.---2-----2----2----- 1. A. striata. 
Glumes longer than the lemmas; panicles open; lemmas often hairy up 
to the base of the awn.....-....2.2.--2222---200- eee eee eee eee 2, A. fatua. 
1. Avena striata Michx. Fl. Bor. Amer. 1: 73. 1803. 
Type Locauity: ‘‘Hab. in sinu Hudsonis per tractus montium ad Canadam,” 
Ranae: British America to New Mexico and Pennsylvania. 
New Mexico: Ponchuelo Creek (Standley 4185). Meadows, in the Canadian Zone. 
2. Avena fatua L. Sp. Pl. 80. 1753. WILD oats. 
Type Locauiry: ‘‘ Habitat in Europae agris inter segetes.”’ 
RanGeE: Native of Europe and Asia, widely introduced into the United States; 
especially common in grain fields. 
New Mexico: Shiprock; Carrizo Mountains; Dulce; Cedar Hill; Cleveland; Taos; 
Pecos; Mora. 
40. DESCHAMPSIA Beauv. 
Annuals or perennials with flat or convolute leaves and rather small shining spikelets 
in terminal or lateral, narrow or loose panicles; spikelets mostly 2-flowered; rachilla 
hairy, jointed above the glumes and prolonged beyond the upper floret as a hairy 
bristle; glumes 2, thin and scarious, acute or obtuse, nearly equal; lemmas subhyaline, 
4-nerved, truncate and more or less regularly 2 to 4-toothed, awned on the back, the 
awn slender, twisted below; palea narrow, 2-nerved; grain oblong, free. 
KEY TO THE SPECIES. 
Plants low, 20 to 40 cm. high; glumes 4 mm. long; awns much longer 
than the lemmas..................-- cece cece ee eee eee eens 1. D. alpicola. 
Plants tall, 60 to 100 cm.; glumes 3 to 3.5 mm. long; awns little if at 
all longer than the lemmas..............-..-------------+----- 2. D. caespitosa, 
1. Deschampsia alpicola Rydb. Bull. Torrey Club 32: 601. 1905. 
Type Locatity: Mountain meadows, Pikes Peak, Colorado. 
Rance: Wyoming and Utah to northern New Mexico, 
52576°—15——6 
