20 LEAFLBTS. 



from a stout ascending rootstock : basal leaves elliptical to ellip- 

 tic-oblong and oblong-linear, subcoriaceous, J to If inches long, 

 on slender petioles not so long, glabrous above, pale and hairy 

 beneath, the thick margins revolute ; cauline leaves mostly 1 or 

 2 only, as long as the others but linear, very erect : spikes 1 to 

 IJ inches long, linear, dense, bulbilliferous to the middle : 

 bracts broadly ovate, entire, tapering to a short but conspicu- 

 ous acumination. 



An inland species of Alaska, the specimens from Kanch Creek 

 in the Yukon Valley, 36 June, 1899, by M. W. Gorman, and 

 distributed for Polygonum viviparum. 



B. LEPTOPHYLLA. Subterranean parts not seen : upright 

 stems 2 feet high : basal leaves 8 to 12 inches long, only f inch 

 broad, linear, tapering to a very short petiole, acutish, glabrous 

 on both faces traversed underneath by a broad flat midvein and 

 delicately reticulate-venulose, the margins thin and somewhat 

 crisped ; not in the least revolute : ocrese an inch long, termina- 

 ting in an oblique red-brown scarious appendage and a small 

 leaf, this lance-linear to oblong-linear : spike 1 to 2 inches long, 

 oblong to cylindric : bracts ovate or ovate-lanceolate, but with 

 an almost aristiform acumination from the truncate or even 

 emarginate upper end : flowers white. 



Frequent in the higher Sierra of California, here described 

 from specimens collected forty years ago by Bolander. The 

 leaves are remarkably like those of Rumex crispus though nar- 

 rower. 



B. scoPULiNA. Stout and low, the several stems 3 to 8 inches 

 high from a more or less rounded and compacted mass of short 

 rootstocks, the whole much like a tuberous root in appearance ; 

 leaves all erect, elliptical to oblong-linear, I to 2 inches long, 

 firm if not subcoriaceous, bright green and glabrous above, pale 

 and minutely rough-hairy beneath, the midvein neither broad 

 nor flattened, traversed by a raised line in the middle, veinlets 

 obsolete except at the very margin, there abruptly prominent : 

 spikes commonly 2 or even 3 inches long and longer than the 

 stem itself, bulbilliferous for more than half their length, the 

 floriferous portion thick and dense : bracts suborbicular, entire, 

 cuspidate-pointed. 



This is of the mountains of northern and middle Colorado 



