No. 33. 

 AGROSTIS HUMILIS Va.scy, Kiill. Toir. Club, .\. '21. 



Plant perennial, in small dense tul'ts, from a short rootstoek or tufts ol' tine loots. 



Culmn erect, slender, smooth, naked above, 4 to S inches high. 



Leai'eii from the base numerous, nai-row, smooth, mostly erect, not rij^id, 1 to 3 

 indies lonjx. Leaves of eiilm usually but one; sheath close, smooth, about \ as long 

 as the <'ulm; blade Ihit, erect, jj line wide, A to 2 inches long; ligule auriitulate or 

 31obed, i line long. 



Injlori'scenee a narrow, rather few-tlowenul, erect panicle, J to li inch(!s long; rays 

 mostly in twos or threes below, twos or single above, erect or slightly sjireading, spikelet- 

 bearing beyond the middle. 



SpikeU'ts lanceolate, turgid, 1 tlowered, nearly 1 line long; empty glumes equal, 

 l)ersistent, ovate-lanceolate, acute, convex, smooth, purple, 1-nerved, i to 1 line long; 

 rioral glume ovate-oblong, minutely toothed at the obtuse ajjcx, thin, smooth. puii)le, 

 or raiely green, 5-nerved, g line long; jialet ovate oblong, thin, smooth, 2 neived. i 

 line long; gi'ain .spiudle-shajjed, equally acute at eaih end. h lini' long. 



Plate XXXIII; 1,2. and 3, plants natuial size; /(, spikelel enlarged in times; 

 ft, empty glumes; c. floral glume, dorsal view; </. palet rolled about the grain. 



Oregon and Washingion ; wet soil. 



