40 POACEAE. 



2. Melica spectabilis Scribn. In meadows from Mont, to Wash., Colo, and 

 Oregon. Alt. 8000-9000 ft. Honnold; North Park; foot of Mt. Richtofen, 

 on the Michigan; mountain west of Cameron Pass. 



3. Melica bulbosa Geyer. In meadows and on hillsides from Mont, to 

 Wash., Colo., Utah and Ore. Rabbit-Ears, Larimer Co.; Glenwood Springs, 

 Garfield Co. Osterhout's specimens (somewhat undeveloped) have unusually 

 broad leaves and may belong to the closely related M. calif arnica Scribn. 



58. DACTYLIS L. ORCHARD-GRASS. 



i. Dactylis glomerata L. Cultivated and naturalized from Europe ; in fields 

 and waste places from N. B. to Wash., Fla. and Calif. Alt 4000-9000 ft. 

 Cucharas River, below La Veta; Chicken Creek; Veta Pass, Costilla Co.; 

 Fort Collins. 



59. BRIZA L. QUAKING-GRASS. 



i. Briza maxima L. Introduced ornamental grass, and escaped along irri- 

 gation ditches. Alt. about 7500 ft. Gunnison. 



60. DISTICHLIS Raf. SALT-GRASS, MARSH SPIKE-GRASS. 



i. Distichlis stricta (Torr.) Rydb. (D. maritima stricta Thurber.) In 

 salt marshes from Sask. to Wash., Mo., Tex. and Calif. Alt. 4000-7500 ft. 

 Grand Junction ; Deer Run ; New Windsor, Weld Co. ; near Denver ; Fort 

 Collins; Saguache Creek; Alamosa; Pueblo; Rocky Ford. 



61. POA L. BLUE-GRASS, MEADOW-GRASS, BUNCH-GRASS. 



Annuals. I. ANNUAE. 



Perennials. 



Cobweb at the base of the flowers present, although in some species scant ; 

 flowering glume acute (except in P. compressa), and usually strongly 

 keeled ; plants with horizontal rootstocks, never true bunch-grasses. 

 Intermediate nerves of the flowering glumes strong. 



Inflorescence with numerous many-flowered spikelets ; its branches in fruit 

 ascending ; the lower in 3*5 or 4*3 ; flowering glumes acutish ; cobweb 

 copious. II. PRATENSES. 



Inflorescence with usually few-flowered spikelets ; its branches reflexed or 



spreading in fruit ; flowering glumes very acute. 

 Spikelets few and usually purplish ; branches of the inflorescence few, 



solitary or in pairs, only in P. callichroa in 3's. III. REFLEXAE. 

 Spikelets many, green ; branches of the inflorescence many ; the lower 

 often in s's or 4*8. IV. PLATYPHYLLAE. 



Intermediate veins of the flowering glumes faint or obsolete. 



Stem compressed ; panicles narrow, open. V. COMPRESSAE. 



Stem not compressed. 



Branches of the panicles reflexed. VI. APERTAE. 



Branches of the large panicle not reflexed. 



Flowers green ; nerves of the empty glumes strong ; meadow species 



with flaccid leaves. VII. SEROTINAE. 



Flowers more or less purplish ; nerves of the empty glumes usually 



faint ; hill species with rather stiff leaves. VIII. RUPICOLAE. 

 Cobweb at the base of the flowers none. 



