WOOTON AND STANDLEY FLORA OF NEW MEXICO. 93 



1. Koeleria cristata (L.) Pers. Syn. PI. 1: 97. 1805. 



Aim cristata L. Sp. PI. 63. 1753. 



Type locality: "Habitat in Angliae, Helve tiae siccioribus." 



Range: 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-flowci ed, 

 the uppermost floret imperfect; racbilla jointed but sometimes not disarticulating 

 until alter 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. , 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. /.'. rru rirana. 



Panicles contracted, 10 cm. long or less; spikelets 3 



to 6 mm. long 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. secundifom. 



Spikelets irowded, 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 el' the 

 State 9. A', pectin 



1. Eragrostia megastachya (Koel.) Link, Hort. Berol. 1: L87. I 



Bron 

 Brixa eragrostia L. S|>. PI. 70. 1753, not-Poa cragivslis L. op. eit. 68 ( -Eragro 



eragrostia). 

 Poa megastachya Keel. Descr. Gram. L81. L802. 

 Eragrostia major Host, Icon. Gram. Austr. 4: 14. pi. : I 09. 

 Eragrostis poaeoides megastachya A. Cray, Man. ed. 5. 631. I 

 Tt ii. loi mi n : European. 



Hanoi : Nearly throughout the United States; naturalized from Europe. 

 Ni-.w Mexico: Cedar Hill; Santa Fe; Pec is Hot Springs; Mao 



■ rendo Creek; We t Fork of the Gila Orj an Mount 

 il, M< . ill. i \ allej ; Carl bad; Ti uco. W u te ground. 



