274 



scarions at the apox; palet nearly equaling the glume, acntoly 2-toothe(l at the 

 acuminate apex. 



Type specimen collected by G. W. Lotterman on Grays Peak, Culorado, 

 in 1885 (No. 7) : alao collected in the typo locality at 11,000 to 14,000 foot by H, N. 

 Patterson, J. H. Wibbe, and M. K. Jones; and on Mount Rainier, Washington, 

 at 9,000 feet altitude, by C. V. Piper, Well distiugnishod by the hmg empty 

 glumes (longer than the floral ones), and the perfectly smooth floral glumes. 

 Poa lucida sp. nov. roreiinial; culms tufted, 1^ to 2 foot high, smooth; radical 

 leaves 5 to 7 inches long, 1 to 2 lines wide, those of the culm about 3, 2 to 3 

 inches long; ligulo white, membranaceous, 2 lines long, decurrent; upper 

 sheaths long, smooth; panicle 4 to 6 inches long, narrow, 1 inch wide to half as 

 wide or leas, the branches mostly in twos or threes, the lower ones 1 to 2 inches 

 long, erect or appressed, naked near thn base; spikelets 3 to 4 lines long, 3- or4- 

 flowered, shining, pale green; empty glumes oblong, abruptly acute, une<]nal, 

 li^ to 2 lines long, smooth, not much compressed, scarious at the apex and margins ; 

 floral glumes 2 lines long, linear-oblong, obtuse, rounded at the back, sparsely 

 and minutely scabrous, slightly pubescent near the base of the k<Mil and lateral 

 nerves, scarious at the apex, 5-nerved; palet nearly equaling its glume. 



Type specimen collected on mountain sides near Georgetown, Colorado, byH. 

 N. Patterson in 1885 (No. 73). Other s])ecim<in3 collected near Graymont and 

 Calloway Hill, Colorado, at altitudes of from 7,000 to 11,000 feet. 

 Poa nervosa (Hook.) Vasey, 111. N. A. Gr. ii. 81 (1893). Culms 1^ to 2i feet high^ 

 rather slender, smooth; radical leaves narrowly linear, 6 to 10 inches long, those 

 of the culm about 3, rather distant, erect, flat, 1 to 3 inches long, 1 to 2 lines 

 wide; panicle 2 to 5 inches long; branches spreading or erect-spreading, the 

 lower 2 to 5 together, filiform, naked below, few-flowered near the extremity, 

 or the panicle often smaller and loss spreading; spikelets 3- to8-fiowered, on pedi- 

 cels of their own length or shorter, flattish, the florets usually rather distant 

 on the slender (sometimes flexuous) rachilla, 2 to 2^ lines long; floral glumes 

 linear-lanceolate, prominently 5-nerved, minutely scabrous on the nerves, 

 otherwise nearly smooth; palet about equaling its glume. 



The type of this species is described and figured as Festuca nervosa in Hooker, 

 Fl. Bor. Amer. ii. 251 (1840), and is an unusually loose-flowered form. This form 

 was re-collected in 1871 near Portland, Oregon, by Elihu Hall, and Dr. Gray, 

 in his determination of Hall's collection (Proc. Amer. Acad, viii.409), referred it 

 to Foa stenautha Trin., from which it really differs in many respects, as shown 

 by specimens from the St. Petersburg herbarium and by many corresponding speci- 

 mens since collected in Alaska. Dr. Gray also thought it probable that, this was 

 Poalepiocoma'Tvm., and Griaebach (Flora Kossica, iv. 373) places Poa lepfocoma 

 Trin. under Foa stcnaniha Trin. as a variety; but from descriptions and typieal 

 specimens from the herbarium of St. Petersburg I am convinced that both of 

 those species are different from Foa nervosa (Festuca nervosa II(H)k.). The 

 species as above described occurs in northern California, Oregon, Washington, 

 Idaho, and Montana. 

 Poa occidentalis sp. nov. Culms slenderly rooted, 2 to 2J feet high, somewhat (com- 

 pressed, leafy ; leaves 5 to 6 on the culm, the lower ones 2 to 3 inches long, tho others 

 longer, tho upper one 5 or 6 inches long and sheathing the base of the panicle j 

 sheaths flattened, scabrous, mostly much longer than the interuodes ; ligule rather 

 conspicuous, obtuse or subacute, scabrous on the outside; paniclelarge and loose 

 6to 12 inches long; branches distant, mostly in threes or tho lower sometimes 

 in fives, and 4 to 6 inches long, erect, becoming spreading, capillary, scabrous 

 near tho extremities, naked below the middle, the spikelets closely racemed and 

 shortpodiceled on the slender subdivisions; spikelets mostly 3-flowered, 2 to 3 

 lines long, light green; empty glumes acute, scarious-margined, unequal, the 

 upper 3-nerved and scabrous on the keel, about one-fom'th shorter than the adja- 



