Nelson: New Plants from Wvomlng 237 



Nutt. but of this there are two or three forms, one of which seems 

 sufficiently well marked to be constituted a variety. 



Paronychia" sessiliflora brevicuspis 



Smaller than the species, more closely matted, the leaves 

 shorter, the lower ones obtuse : the herbaceous part of the 

 branches very short : flowers in numerous small cymes, clustered 

 ■ ■ at the ends of the branches, nearly immersed in the leaves : cal}'x 

 about 2 mm. long, with a swollen turbinate base : sepals closely 

 valvate, forming a short cylindrical tube closed at the summit by 

 their arched tips, the tip and awn very short. 



Not plentiful, but occurring occasionally on open, stony ridges 

 in the hills. No. 349, Laramie Hills, July 7, 1894, well repre- 

 sents this variety. 



ParonycJiia Janicsii T. S: G. has sometimes been reported from 

 this range, but it seems probable that most of the specimens so- 

 called belong rather to the following species. 



Paronychia diffusa 



Allied to P. Jainesii but wholly prostrate-spreading : the 

 woody root vertical, the numerous branched stems crowded on its 

 crown : stems widely spreading, their perennial portion buried in 

 the soil, the herbaceous portion short, very leafy ; leaves equaling 

 or exceeding the internodes, narrowly linear, mostly acute and 

 mucronate : stipules silvery, lanceolate, shorter than the leaves : 

 influorescence contracted, the numerous small cymes congested at 

 the ends of the short, brittle stems : flowers nearly sessile, exceed- 

 ing the bracts and most of the leaves : sepals minutely i:)uberulent 

 as are also the leaves and stem, the short turbinate base of the 

 calyx minutely hirsute : cusps short, arched within : filaments 

 short, exceeding the staminodia. 



This is the commonest species In this genus in this range. 

 The following numbers well represent it : 451, 1331, 2103 and 

 2769. 



Besides the foregoing P, pulvi)iata Gray occurs on some of 

 the Alpine summits in our mountains. 



F 



Draba surculifera 



i 



Perennial, root short, bearing on its crown a few^ to several 

 erect, simple stems and some short leafy stolons : stems slender, 

 strict, 2-3 dm. high, pubescent with scattering, simple hairs and a 

 closer branched puberulence : leaves of the crowns and the stolons 



