268 



8. Pulsatilla hirsutissima (Pursh) Britton. We were much 



interested to find this, in perfectly typical form, growing 

 sparingly above timber line (at about 11,300 ft.) on the 

 Longs Peak trail, some of the plants not yet through 

 flowering. 



9. Cheirinia Cockerelliana (Erysimum Cockerellianum Daniels, 



Univ. of Mo. Studies, 191 1). Very abundant, running 

 to very rich shades of orange and brownish-orange, all 

 about Longs Peak Inn, and up into the Hudsonian Zone. 

 This is surely not the Erysimum Wheeleri, described from 

 San Francisco Mountain, Arizona, though specimens in 

 the herbarium will look much alike ,.£. Wheeleri being much 

 too large to preserve entire, at least when fully grown, 



10. Cheirinia nivalis radicata (Erysimum radicatum Rydberg). 



Abundant above timber line on the Longs Peak trail. The 

 leaves are more or less sinuate-dentate, and the plant is 

 certainly radicatum, but it can hardly be doubted that 

 Nelson is correct in regarding this as conspecific with C. 

 nivalis (Greene) Rydb. The oldest name for the aggre- 

 gate is Erysimum asperum nanum Cockerell, Nature 

 Notes, 1891, p. 15; I think, however, that the species is 

 a valid one, and according to the botanical rules Greene's 

 name takes precedence. It is certainly very striking to 

 come out of the forest, where C. Cockerelliana is so abun- 

 dant, and find taking its place a species not only of lower 

 stature, but almost uniformly with clear yellow flowers. 

 I should have said quite uniformly so, had I not found a 

 single plant with reddish petals, the purplish pigment being 

 so arranged as to leave yellow streaks and margins, an 

 arrangement quite difTerent from that of C. Cockerelliana 

 in which the anthocyan pigment is diffused. I have never 

 collected C. amoena (Greene) Rydb., which is like nivalis 

 but is said to have flowers colored like those of Cockerel- 

 liana. It is, I suppose, a derivative of nivalis, originating 

 in some such form as my single sport described above, 

 and not a variety of cockerelliana. In addition to the 

 sport described, some of the plants with pure yellow 



