271 



mostly in twos or tliroes. Ttomly sniootli ; spikelets 2 to nearly 3 lines long, 3- to 

 5-iIo\vcix'(l; fiiipty uliinics oviitc, afuto, the iijsper as loiij; as the floral ones, tLe 

 lower oue-iourth shorter; tlonil ^^luiiiii.sovtvte-ianoeolate, ^ lines lon,<;, snhiicnte, 

 prominently S-nerved, roiighish pnheseent, apex and npper part of margins aea- 

 rions, sparsely hairy at the l>ase. 



Type specimen collccled l)y T. J. ITo-well on the sandy oecan lieacli at Tilla- 

 mook !5iiy, Oregon, in 1872 (No. 159). Other speeimeiis have been co]Ieete(l<msa,ndy 

 shores of ColnmbiaKivcr, Oregon; Kitsap Connty,\Vashiii!Ttoii ;YaueonverIshind ; 

 ami Alaska. This has he<'u taken for J'oa ahhreviala K. IJr., -which is a truly Arctic 

 grass, 3 to 4 inches high, with the outer glumes longer, the floral flumes silky 

 pubescent below and woolly-tufted at the liase. 1 had an 0|>portunity of studying 

 the types of that species in the British Museum, and was satisfied of its diH'ereuce 

 from our plant. 

 Poa cusickii sp. nov. Culuis densely tufted, 12 to 18 inches high, smooth, Tath(;r slen- 

 der, erect, with 2 distant, very short leaves, the lower one near the base; radical 

 leaves nnmerous, filiform, ^ line or less in width, not rigid, 3 to 5 inches 

 long; caulino leaves 2 to 3, distant, with long sheaths and short (1 to 3 inches), 

 erect, narrow blades; ligulo thin, scarions, decnrreut, about 2 lines long, sub- 

 acute; panicle pur])le or green, ohlong-pyraniidal, 2 to 3 inches long, open, 

 erect, branches short above, gradually lonj^er below, the lower ones 1 to 1-^ 

 inches long, in twos or rarely threes, unequal, filiforn), erect-si)Teadiug, sjiikelet- 

 heariug above the middle; spikelets 4 to 5 lines long, 3- to 5-tiowered ; empty 

 glumes about 2 lines long, little more than one-half as long as the adjacent 

 florets, acute, the u]i}ier 3-nerved, broadly scarious-margined; floral glumes 2i 

 to 3 lines long, lanceolate, acute, scarions at the apex, 5-nerved, finely scabrous- 

 puberuleut, not pubescent or webby at the base; i)alet nearly as long as its 

 glume. 



Type specimen collected by W. C. Cnsick in Ore<;on in 1885 (No. 1219) : other 

 Bpecimens collected in Oregon by Thomas HoAvell (No. 183); at Fossil Station, 

 "Wyoming, by G. "VV. I.etterman (No. 137); also in Idaho by J. H. Sandberg. It 

 approaches closely to 1'. JilifoUa Vasey, but has shorter leaves and a smaller, 

 denser panicle. 



Poa filifolia sp. nov. Culms denscdy clustered, from a slender rootstock, erect, slen- 

 der, 16 to 24 inches high, with 2 or 3 distant, narrow, 8h{»rt-b]aded leaves; rad- 

 ical leaves abundant, tiliforai, 6 to 10 inches long, flaccid, erect; leaves of the 

 culm 2 to 3, distant, witli long sheaths, and short (I to 3 inches), erect, filiform 

 blades; ligule loss than 1 line long, acute; panicle loose and flexuous, 3 to 4 

 inches long; branches capillary, scabrous, rather distant, the lower in twos or 

 threes, unequal, the longer about li inches long, with few spikelets near the ex- 

 tremitj-, naked below ; spikelets compressed, 3 to .5 lines long, rather loosely 5- to 

 7-flowered, on tiliforni pedicels; emjity glumes nearly equal, one-third shorter 

 than the adjacent florets, lance-ovate, acute, broadly scarious-raargined; floral 

 glumes 2,} to 3 lines long, lanco-oblong, subacute, scarions at the apex, minutely 

 scabrid throughout, slightly more so on the keel, intermediate nerves rather in- 

 distinct; palet nearly equaling the glume, scabrous on the keels. 



Type specimen collected by J. H. Sandberg on rocky banks of Hatwai 

 Creek, Nez Forces County, Idaho, in 1892 (No. 138) ; also collected by Dr. 

 Sandberg on basaltic slopes on Clearwater Eivor, near Lewiston, Idaho (No. 86). 



Poa flexuosa robusta var. nov. Culms 2J to 3 feet high, with 4 or 5 leaves, 

 slightly compressed below; the two or three leaves near the base 2 to 4 inches 

 long, 2 to 3 lines wiile, sheaths shorter than the internodes, the upper leaves 4 

 to 6 inches long, with long sheaths; ligule membranaceons, 1 to 2 lines long, ob- 

 tuse; panicle large, 8 to 10 inches long, erect, with about 8 distant pairs of 

 spreading branches, which are capillary, naked below the middle, sparingly- 

 branched and flowering above; spikelets 2^ to 3J lines long, 3- to 5-flowerocij 



