No. 69. 



PLEUROPOGON REFRACTUM Vasey; Lophochlcena refracta Gray, 

 Proc. Amer. Acad. viii. 409 (1872). 



Plant perennial, tufted, from a strong, creeping rootstock. 



Culms erect, simple, smooth, leafy to the panicle, 2 to 4 feet tall. 



Leaves of culm 3 or 4; sheaths nearly smooth, striate, open at the throat, equal- 

 ing or slightly exceeding the long internodes ; blade flat or folded, scabrid above, 

 abruptly pointed, 2 to 4 lines wide, lower ones 6 to 10 inches long, uppermost 1 to 2 

 inches long; ligule truncate, 1 to 2 lines long. 



Inflorescence an erect, simple, seeund panicle of 6 to 10 spikelets pendent on slen- 

 der, recurved pedicels 1 to 2 lines long at intervals of 1 to 3 inches on the slender, 

 flexuous axis. 



Spikelets linear-oblong, 8- to 12-flowered, about 1 inch long; empty glumes lance- 

 oblong, obtuse, or emarginate, often denticulate, thin, smooth, 1-nerved, 2 to 2£ lines 

 long, the second slightly longer; floral glume lance-oblong, erose, or dentate at the 

 rather truncate, membranaceous summit, nearly smooth, prominently 7- to 9-nerved, 

 3£ to 4 lines long; awn arising at the apex, 2 to 4 lines long; palet linear, emarginate, 

 the margins flatly infolded, with a rather obtuse wing midway on the back of each 

 keel, few if any teeth above, £ line shorter than the glume; stamens 3; ovary smooth, 

 with 2 stigmas plumose near the ends; grain oblong, dark brown, 2 lines long. 



Plate LXIX; a, spikelet; b, floret opened; c, floral glume, dorsal view. 



Oregon and Washington, in cold, damp bogs and along mountain streams. This 

 may be distinguished from the preceding species by its more robust habit, pendent or 

 reflexed spikelets, and blunt wings on the palet. 



