78 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM, 



Range: British America to Mexico; also in Europe. 



New Mexico: Sliiprock; Farmington; Sandia Mountains; Albuquerque; Socorro; 

 Kingston; Mangas Springs; Mesilla Valley; Fort Bayard; Alamogordo. In wet ground, 

 in the Upper Sonoran and Transition zones. 



2. Polypogon littoralis (With.) J. E. Smith, Comp. Fl. Brit. ed. 2. 13. 1816. 



Agrostis littoralis With. Bot. Arr. Veg. Brit. ed. 3. 2: 129. 1796. 



Type locality: "Wells, on the Norfolk coast," England. 



Range: British America to California and New Mexico and the Gulf Coast; also 

 in the Old World. 



New Mexico: Berendo Creek; Albuquerque; Alamogordo; Carrizo Mountains. 



Wet ground. 



34. CINNA L. Wood reed grass. 



Tall perennials with numerous fiat leaves and with many-fiowered nodding panicles; 

 spikelets 1-flowered ; rachilla jointed below the glumes as well as above them, produced 

 below the floret into a short smooth stipe and usuallj'^ extending behind the palea as a 

 slender naked bristle; lemmas similar to the glumes, 3-nerved, obtuse, usually with 

 a very short subterminal awn; palea apparently 1-nerved, keeled; stamen 1; styles 

 short, distinct; grain free. 



1.. Ciniia latifoUa (Trevir.) Griseb. in Ledeb. Fl. Ross. 4: 435. 1853. 

 Agrostis latifolia Trevir.; Gopp. Beschr. Bot. Gart. Breslau 82. 1830. 

 Cinna pendula Trin. Mem. Acad. St. Petersb. VI. Sci. Nat. 4': 280. 1841. 

 Type locality: Not ascertained. 



Range: Alaska and British America to Oregon, Ncav Mexico, and North Carolina. 

 New Mexico: Sandia Mountains (IFbo ton). Transition Zone. 



35. AGROSTIS L. 



Annuals or usually perennials with small spikelets in open panicles; spikelets 

 1-flowered; rachilla jointed above the glumes, not produced beyond the floret; glumes 

 equal or nearly so, acute, longer than the floret; lemma rather broad, less firm than 

 the glumes, usually obtuse, awnless or with a slender dorsal awn; palea hyaline, much 

 shorter than the lemma or wanting; stamens 3; grain inclosed in the lemma but fi'ee. 



KEY to the species. 



Panicles dense or very narrow. 



Culms decumbent at the base, with long creeping stolons rooting 



at the nodes; panicles short and thick 1. A. stolonifera. 



Culms erect, without stolons; panicles long and narrow 2. A. exarata. 



Panicles loose and spreading. 



Branches of the panicle 7 to 10 cm. long 3. A. hiemalis. 



Branches of the panicle 4 to 6 cm. long. 



Palea minute and inconspicuous 4. A. idahoensis. 



Palea half as long as the lemma. 



Lemma usually not awned; branches of the panicle 



ascending 5. A. alba. 



Lemma with an awn of about the same length; branches 



of the panicle spreading or reflexed 6. A. rosei. 



1. Agrostis stolonifera L. Sp. PI. 62. 1753. Water bentgrass. 



Agrostis vrrticillaln Vill. Prosp. PI. Daujjh. 16. 1779. 

 Type locality: "Habitat in Europa." 



Range: California a7id Texas to Mexico; also in South America, Europe, and Asia. 

 New Mexico: Carrizo Mountains; Farmington; Sandia Mountains; Santa Fe; Las 



