120 GRAMINEAE 



13. A. rossae Vasey. Culms 4 to 8 iuclies high ; pauic-le coutraeted, 1 to 2^ 

 inches long, the branches appressed; spikclets green or purple, 1 line long; 

 lemma % line long, awnless ; palea minute. — Differs from A. exarata chiefly in 

 the size, possibly an alpine form of that species ; glumes not scabrous on the 

 back as usual in A. exarata. 



Rocky creeks and momitain slopes; in California confined to the high Sierra 

 Nevada ; north to Washington and east to Wyoming. 



Locs. — Douner Pass, Eellcr 7140; Rubicon Eiver, Lciberg 534fi; Summit Valley, Fringle; 

 Mt. Tallae, Eitchcoclc 3150; Mt. Dana, BolaiuUr 5070; Yosemite Nat. Park, Hitchcock 3331, 

 Lemmon ; Kern Elver, MotlirocJc 323. 



Eefs. — Ageostis rossae Vasey, Contr. Nat. Herb. 3: 76. 1892. A. varians Trin. Mem. 

 Acad. St. Petersb. VI. Sci. Nat. 4' : 314. 1840, not Thuill. 1790 ; Thurb. in Wats. Bot. Cal. 2 : 



273. 1880. 



14. A. hiemalis B. S. P. Culms slender, tufted or scattered, 8 inches to 3 

 feet high, but usually delicate ; leaves usually mostly basal, the blades narrow 

 or almost setaceous ; panicle very diffuse and open, as much as a foot long, the 

 branches scabrous, long and capillary, bearing spikelets near the extremities; 

 glumes % to 1 line long, acute or acuminate; lemma % to % as long as glumes; 

 awnless or rarely awned ; palea wanting. 



Meadows and moist places in the Sierra Nevada and in the high mountains 

 of southern California; extends throughout North America. 



Var. geminata Ilitchc. Differs from A. hiemalis in having a smaller, 

 less diffuse panicle, with divaricate branches; culms usually less than a foot 

 high; lemma awnless in the California specimens. — Arctic and alpine regions. 

 Lassen Peak, Jones; Kern River, Rothrock. 



Eefs. — Ageostis hiemalis B.S.P. Prel. Cat. N. Y. 68. 1888. Cornucopiae hiemalis Walt. 

 Fl. Carol. 73. 1788. Agrostis scabra Willd. Sp. PI. 1: 370. 1798; Thurb. in Wats. Bot. Cal. 2: 



274. 1880. Var. geminata Hitclic. U. S. Dept. Agr. Bur. PI. Ind. Bull. 68 : 44. 1905. A. gem- 

 inata Trin. Gram. Unifi. 207. 1824. 



15. A. idahoensis Nash. Culms slender, 4 to 12 inches high; panicle loosely 

 spreading, 2 to 4 inches long, the branches capillary, minutely scabrous; spike- 

 lets % line long; lemma 1 line long, awnless; palea minute. — Differs from A. 

 hiemalis in the narrow panicle with shorter branches. 



Mountain meadows of the Sierra Nevada, San Bernardino and San Jacinto 

 mountains, north to Washington and east to Colorado. 



Locs. — Lincoln Valley, Sierra Co., Kennedy ij- Dotcn 195; Amador Co., Hansen 2079; Cala- 

 veras Co., Hillebrand 2247; C'larks, Torrcy 567; Yosemite Nat. Park, Bolander 6106, 6107, 

 Hitchcock 3230, 3342; Mono Co., Shockley 614; Black Mt., Hall f Chandler 003; Northfork, 

 Griffiths 6663; Kings River, Brewer 2823; Sequoia Nat. Park, Hitchcock 3463; San Bernardino 

 Mts., Hall 7618, Parish 3302 ; San Jacinto Mts., Hall 2363, Reed 2500. 



Eefs. — Ageostis idahoensis Nash, Bull. Torr. Club 24: 42. 1897. A. tenuis Vasey, Bull. 

 Torr. Club 10: 21. 1883, not Sibth. 1794. 



16. A. schiedeana Trin. Culms 2 to 3 feet high; panicle oblong, 4 to 12 

 inches long, open, the branches verticillate, rather stiff and ascending, the 

 lower whorls numerous, the longer 2 to 4 inches long, branching above the 

 middle; glumes ly^ to II/2 lines long; lemma % line long, awnless; palea 

 small, about 1/4 line long. 



Wet meadows, through the high Sierra Nevada, also in the San Bernardino 

 Mts. ; extends from British Columbia to Mexico. 



Locs.— Big Meadows, Placer Co., Austin 1196; Tahoe, Hitchcock 3096; Glen Alpine, Mc- 

 Gregor 33; Yosemite Valley, Bolander 4954, 6103; San Bernardino Mts., Parish Bros. 1560. 



Refs.— Ageostis schiedeana Trin. Mem. Acad. St. Petersb. VI. Sci. Nat. 4': 327. 1840. 



