NEW WESTERN PLANTS. 221 



New Western Plants. 



Senbcio orthophyllus. Suffrutescent, the woody basal 

 branches stout, rigid, obscurely angular, white-tomentulose ; 

 flowering branches a foot long, very erect, loosely leafy, sub- 

 corymbose at summit, all the leaves linear, entire, obtuse, revo- 

 lute, the principal ones 2-3 inches long, erect, even almost 

 appressed to the branch, the axils of the lower bearing crowded 

 fascicles of a foliage short but otherwise similar, the whole 

 white-tomentose, even to the involucres, these less than J inch 

 high, subcampanulate : rays nearly i inch long, yellow, not 

 numerous. 



Willow Springs, Arizona, 1890, Dr. Edw. Palmer, n. 479 as in 

 U. S. Herb. 



Senecio Monoensis. Woody at base, with many striate- 

 angled stems decumbent, IJ feet high, rather sparsely leafy, of 

 a rather light green, the plants glabrous in all its parts ; leaves 

 made up of a filiform-linear rachis and few as narrowly linear 

 remote acute segments : heads large, in a loose subcorymbose 

 panicle ; involucres broadly subcylindric, } inch high, notably 

 calyculate-bracted at base, the main bracts narrow, linear, 

 acuminate : rays rather many and conspicuous, clear yellow. 



White Mountains of Mono Co., Calif., on slate hills near 

 Southern Belle Mine, 25 May, 1906, A. A. Heller, n. 8330. 



Seneoio Leiber&ii. stems solitary, very erect from the 

 crown of a fascicle of fibrous roots, 1 J feet high, rather slender, 

 simple, ending above in an ample fastigiate corymb of larger 

 than middle-sized heads : leaves mainly basal, thin, plane, oval- 

 elliptic or elliptic, nearly entire, almost glabrous, 2J-3i inches, 

 long, on slender petioles of more than equal length, the scat- 

 tered cauline leaves lance-linear, sessile, sharply denticulate 

 somewhat arachnoid-hairy as also the stem and inflorescence : 

 involucres short-cylindric, bracts oblong-linear, acuminate : rays 

 many, white: achenes acutely few-angled, light-colored, glab- 

 rous. 



Leaflets, Vol. I. pp. 221-228, Sept. 8, 1906. 



