WOOTON AND STANDLEY—FLORA OF NEW MEXICO, 93 
1. Koeleria cristata (L.) Pers. Syn. Pl. 1: 97. 1805. 
Aira cristata L. Sp. Pl. 63. 1753. 
Tyre Locauity: ‘‘Habitat in Angliae, Helvetiae siccioribus.”’ 
Rance: British America to Arizona, Kansas, and Pennsylvania; also in Europe. 
New Mexico: Common in all the mountain ranges. Open slopes and in woods, in 
the Transition Zone. 
61. ERAGROSTIS Beauv. 
Annuals or perennials with simple or branched culms; spikelets 2 to many-flowered, 
the uppermost floret imperfect; rachilla jointed but sometimes not disarticulating 
until after the fall of the lemmas; glumes more or less unequal, usually shorter than 
the lemma; lemmas glabrous, obtuse or acute, awnless, 3-nerved, the lateral nerves 
often faint; paleas shorter than the lemmas, often persistent, 2-nerved. 
KEY TO THE SPECIES. 
Annuals. 
Spikelets broad, more than 2 mm. wide..................-- 1. E. megastachya. 
Spikelets narrow, 1.5 mm. wide or less. 
Plants low, spreading, 30 cm. high or less; leaves nar- 
row; spikelets many-flowered; plants of cultivated 
fields and river valleys.............-----000+---0- 2. E. pilosa. 
Plants tall, 30 to 100 cm.; leaves broad; spikelets few- 
flowered; plants usually found in the mountains. 
Panicles spreading, often nearly 30 cm. long; spikelets 
5 to 8 mm. long.............-..-------------- 4, E. mexicana. 
Panicles contracted, 10 cm. long or less; spikelets 3 
to 6 mm. long...........2. 2. eee eee eee eee 3. E. limbata. 
Perennials. 
Plants with rigid scaly rootstocks; leaves pungent-pointed.... 5. E. obtusiflora. 
Plants tufted, without rootstocks; leaves not pungent-pointed. 
Spikelets crowded, on very short branches........-.-..-- 6. E. secundiflora. 
Spikelets not crowded, on long slender branches. 
Panicles narrow and elongated, the branches long 
and flexuous, erect or nearly so; lateral nerves 
of the lemmas evident............------------ 7. E. trichodes. 
Panicles rather open, the branches spreading or 
ascending, rather rigid; lateral nerves of the 
lemmas evident or obscure. 
Lateral nerves of the lemmas faint; plant of the 
mountains............------------------ 8. E. lugens. 
Lateral nerves of the lemmas very prominent; 
on the plains of the eastern part of the 
State........ 2... ee eee eee eee eee ee eee 9. E. pectinacea. 
1. Eragrostis megastachya (Koel.) Link, Hort. Berol. 1: 187. 1827. 
STINK GRASS. 
Briza eragrostis L. Sp. Pl. 70. 1753, not Poa eragrostis L. op. cit. 68 (=Fragrostis 
eragrostis). 
Poa megastachya Koel. Descr. Gram. 181. 1802. 
Eragrostis major Host, Icon. Gram. Austr. 4: 14. pl. 24. 1809. 
Eragrostis poaeoides megastachya A. Gray, Man. ed. 5. 631. 1867. 
TYPE LOCALITY: European. 
Ranae: Nearly throughout the United States; naturalized from Europe. 
New Mexico: Cedar Hill; Santa Fe; Pecos; Las Vegas Hot Springs; Mangas Springs; 
Dog Spring; Berendo Creek; West Fork of the Gila; Organ Mountains; Tularosa; 
Roswell; Mesilla Valley; Carlsbad; Texico. Waste ground. 
