276 



Poa reflexa Vasey & Scribn. sp. nov. Culms 10 to 20 inches high, slender, erect, 

 emootli, iucludinif the rachis andhranches; leaves of the culm about 3. narrow or 

 rather broad, acute, erect, 2 to 3 inches long; sheaths long, smooth, shorter 

 than tile iuternodes; lignle 1 line long, obtuse; panicle 2 to 4 inches long, 

 pyramidal, with about 6 nodes ; the branches capillary, rather distant, the 

 lower ones 2 to 3 inches long, smooth, spreading and becoming rcllexod, 

 naked, spikelet-bearing near the ends; spikelets 2- or 3-Howered, 1^ to 2 lines 

 long; empty glumes lanceolate, acute, smooth, slightly shorter than th« adjacent 

 florets; floral glumes ovate-lanceolate, acute or subacute, obscurely nerved, 

 pubescent on the nudnerve and lateral nerves, with a narrow tuft of hairs at the 

 base; palet pubescent on the keels. 



Type specimen collected by G. W. Letterman on Kelso Mountain, near Torrey 

 Peak, Colorado, in 1885. It grows at high altitudes on margins of streams, usu- 

 ally in wet, sandy or gravelly soil. Rocky Mountains, Colorado, northward to 

 Montana, Washington, and British America. The long, smooth, reflexed capil- 

 lary branches are characteristic of this species, and distinguish it from Poa 

 arctica K. Ur. with which it has been confused. A small form of P. rejlexa is 

 represented in Vasey, 111. N. A. Gr. ii. Fig. 4, PI. 71. The name without de- 

 scription ai)pear8 in Vasey, Descr. Cat. Gr. 83 (1885). 



Poa sandbergii sp. nov. Culms tufted, 10 to 16 inches long, slender, upper portion 

 naked, the lower portion bearing about 2 sheaths with very short blades ; leaves 

 mostly radical, 2 to 4 inches long, very narrowly linear, those of the culm about 

 2, the blade 1 inch long or loss; ligule abont 1 line long; panicle 1-J- to 3 inches 

 long, sometimes very narrow, or leas than 1 inch wide, the branches ascending 

 nearly smooth, the lower in twos or threes, unequal, the longer one 1 to 2 inches 

 long, spikelet-bearing above the middle; spikelets short-pediceled, 2- to 4-flow- 

 ered about 3 lines long, often purplish; empty glumes lanceolate, subacute, about 

 two-thirds as long as the adjacent florets; floral glumes linear-oblong, obtuse 

 nearly 2 lines long, sparsely pubescent or puberulent, somewhat villose near the 

 base but not webbed, scarious at the apex; palet equaling its glume, pubescent 

 on the keels; internode of rachilla puberulent, ^line long. 



Collected by J. H. Sandberg near Lewiston, Idaho, in 1892 (No. 164). Also 

 found by other collectors in Washington and California. It approaches some 

 forms of I'oa tenuifoUa Nutt., from which it raay be distinguished by its smaller 

 spikelets, shorter florets, and more pubescent floral glumes. 



Poa sheldoni sp. nov. Culms from a creeping rootstock, rather rigid, 8 to 10 inches 

 high, smooth, having 3 or 4 leaves 1 to 2 inches long, rigid, erect, or somewhat 

 curved; lignle short, acxite; sheaths longer than the iuternodes, ^mootli, striate; 

 radical leaves 2 to 3 inchea long, rigid, conduplicate, curved ; panicle narrow, 

 1^ to 3 inches long, with 5 or 6 nodes; branches mostly in twos, erect, each 

 with usually about 2 spikelets, the lower branches about 1 to 1^ inches long, 

 flowering above the middle; spikelets mostly short-pediceled, large for the 

 panicle, erect, about 3 lines long, 3- to 4-flow6red; empty glumes oblong-lance- 

 olate, 1^ to nearly 2 lines long, membranaceous, abruptly acute, smooth ; floral 

 glumes 2 lines long, oblong-lanceolate, subobtuse, 5-nerved, with a sliort pubes- 

 cence near the base, scarious at the apex and margins; palet ciliate-pubescent 

 on the keels, nearly eqiialing the glume. 



Type specimen collected in wet, sandy soil, along Cottonwood Creek, Buena 

 Vista, Colorado, at 8,000 feet altitude, by C. S. Sheldon, July 4, 1892 (No. 615). 

 This species approaches very closely some small forms of Foa ai'ida Vasey, but 

 may be distinguished by the less pubescent floral glumes, 



Poa tracyi sp. nov. Culms *2 to 2^ feet high, rather stout, erect, slightly com- 

 pressed ; lower leaves short, 2 to 3 inches long, increasing in length above, the 

 upper 4 to 5 inches long, erect, rather thick, acute, smooth; sheaths striate, 

 smooth; ligule shorty obtuse; paaiicle 6 to 10 inches long, 1 to 2 inches wide, 



