158 Wyoming Experiment Station. 



Krynitzkia Pattersoni, Gray, Proc. Am. Acad, xx, 278. 



Rare ; in the Laramie Hills, July 7, 1894 (No. 412). 

 Krynitzkia sericea, Gray, Proc. Am. Acad, xx, 277. Oreocarya seri- 

 cea, Greene. 



Frequent on rocky slopes in the Laramie Hills; June 16, 1894 

 (No. 255); Uva, July 10, 1894 (No. 389). 

 Krynitzkia virgata, Proc. Am. Acad, xx, 279. 

 Frequent on sandy ridges in the foothills. 



Telephone canon, June 15, 1894 (No. 231); Centennial Valley, 

 June 9, 1895 (No. 1267). 

 Krynitzkia Watsoni (?) Gray, Proc Am. Acad, xx, 270. 



These are somewhat doubtfully placed here ; collected on wet, 

 shaded rocky ledges in the Centennial Hills, August 17, 1895 (No. 

 1684). 

 Mertensia alpina, Don. Syst. iv, 320. 



Strictly alpine from a climatic point of view, but hardly so from 

 that of altitude; very early in the Laramie Hills while freeziug 

 nights are still the rule ; often in blossom by April 20. (Nos. 33 and 

 1222). 

 Mertensia lanceolata, DC. Prodr. x, 88 (1846). 



Very variable as to size and general appearance, but floral char- 

 acters and the light-green glaucus color constant. It is abundant 

 and frequent in our foothills in two forms : a small form from large, 

 coarse rootstocks, very early, radical leaves few, stem leaves nearly 

 uniform, panicle close and leafy ; a much larger form later in the 

 season, usually in copses, stem leaves gradually reduced in size, 

 panicle long and open. 1, Laramie Hills, May 16, 1894 (No. 34); 

 2, Pole Creek, June 28, 1895 (No. 1234). 



Mertensia lanceolata viridis, n. var. 



Root stocks slender, creeping in the crevices among the rocks ; 

 radical leaves numerous, long and slender petioled, from oblong to 

 elliptical ; cauline leaves oblong, gradually reduced in size ; stems 

 few and slender, 5-8 inches high, bearing an open panicle; floral 

 characters those of the species, except that the corolla tube is wider 

 and shorter. Mertensia lanceolata, DC. 



This plant is alpine in habitat and may be known by the bright 

 green color of its leaves, which are scarcely scabro-puberulent under 

 a lens. 



