250 The Ottawa Naturalist. [February 



SOME NEW CANADIAN SENECIOS. 



By Edw. L. Greene. 



The following- members of the genus Senec'to^ all apparently 

 hitherto undescribed, form a part of a most rich and valuable col- 

 lection of plants made by Mr. James M. Macoun in the Chilliwack 

 Valley, B.C., during- the summer of 1901. 



Senecio crepidineus. Perennial, low but rather stout and 

 very leafy, allied to S. taraxacoides and S. Hohnii, commonly 4 to 7 

 inches high, lightly somewhat arachnoid or floccose-pubescent, or 

 often almost glabrous : leaves mostly basal and supra basal, the 

 one or two properly cauline quite similar to, and scarcely smaller 

 than the others, all obovate-lanceolate, i )^ to 4 inches long, 

 tapering to a broad petiole, acutish, saliently and sharply dentate: 

 corymbose panicle of large more or less nodding heads little or 

 not at all surpassing the leaves : involucres nearly yi inch high, 

 subcylindric, the linear bracts about 10 ; rays about as many, 

 light-yellow, about 5-nerved. 



Collected at an altitude of 6,000 feet; closely allied to several 

 alpine and subalpine species of the more southerly Rocky Moun- 

 tains, the whole terming a group of which S. Soldanella may be 

 considered typical. The heads in this new one are much more 

 numerous and notably narrower than in any of the allied species. 

 Its number in the Geol. Surv. collection is 26,678. Its habitat, as 

 given by Mr. Macoun is "damp debris on a snow-slide." 



Senecio prionophyllus. Resembling S. triangularis, but 

 leaves on shorter petioles and distinctly hastate, more gradually 

 acuminate, much more deeply and sharply serrate-dentate, in 

 texture much firmer and dark-green, with venation pale or whitish, 

 underneath whitish tomentulose, above obscurely and sparse^ 

 short-hairy, but the stem densely villous-tomentulose from base 

 almost to summit,, this indument subfuscous : inflorescence dense 

 and more fastigiate than in S. triangularis ; the rays longer anu 

 very narrovV : achenes short and slender-columnar, not narrowed 

 under the pappus, this very fine and promptly deciduous. 



