No. 75. 

 POA CONFINIS Vaseysp. nov. 



Plant perennial, cipspitose or tufted, with numerous sterile slioot.s from a creeping 

 rootstock. 



Viilnm erect, or slightly <lecumbent at the base, smooth, slender, leafy to the 

 middle or the shorter ones leafy to the pauit-le, 4 to 12 iuches tall. 



Leaves of sterile shoots nnnierons, with smooth, striate, scariousinargiued sheaths 

 and slender, involute blades "• t<i 6 inches long or as long as the cnlnis: leaves ofeidui 

 2 or 3; sheaths ojien above, shorter than the internoiles; blades involute, apieulate, 1 

 to 2 inches long; ligule 1 line long or less or nearly obsolete. 



InJiorcHceniT a rather closely tlowered. oblong panicle 1 to 2 inches long; rays in 

 twos and threes or solitary at the 3 to nodes, unequal, 1 inch long or less, scabrous, 

 divided, s])ikelet bearing near the extremities. 



Spikricts slightly compressed, 2 to 3 lines long. 3- to G-flowered with a rudiment; 

 empty glumes broisdly ovate, acute, Inerved or obscurely 3-nerveil, nearly smooth, 1 

 to Ih lines long, the second slightly longer, but neither equaling the lower Horets; 

 lloral glume broa<lly ovate, acnte, somewhat carinate, slightly pubescent or scabrid 

 in age, ratlier tliick for the genus, not webbed, 5-nerved, about 1 J lines long; palet 

 ovate oblong, obtuse, arched, twisted when dry, pubescent on the keels; stamens 

 .■{, with exserted anthers on very slender filaments; ovary smooth, pear-shaped, with 

 2 slioit, feathery stigmas; lodicides i line long; grain ovate, furrowed, nmgh. yellow, 

 1 line long. 



Plate LXXV; «, spikeh-t: Z/, tloret with the glume and palet spread to show 

 the ripened grain; v, lloret witli stamens exserted. 



Oregon t<i Alaska, mostly on the sandy seasliore. This species is imperfectly 

 diceeious. Those ]>lants which ripen grain have only abortive stamen.s while those 

 with ]iiMtect anthers have oidy abortive pistils. Dr. Thnrber in Wats. I'.ot. Cal. ii. 

 312 ^lii.S<i) referred this species to I', abbrcrialu K. Br., a much smaller Arctic species. 



