NEW WESTERN PLANTS. 221 
New Western Plants. 
SENECIO 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 } inch 
high, subcampanulate: rays nearly 4 inch long, yellow, not 
numerous, 
Willow Springs, Arizona, 1890, Dr. Edw. Palmer, n. 479 as in 
U: 8. Herb. 
SENECIO Monornsis. Woody at base, with many striate- 
angled stems decumbent, 14 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, 4 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. 
SENECIO LEIBERGII. Stems solitary, very erect from the 
crown of a fascicle of fibrous roots, 14 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, 23-34 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-cylindrie, bracts oblong-linear, acuminate: rays 
many, white: achenes acutely few-angled, light-colored, glab- 
rous. : 
Leartets, Vol. I. pp. 221-228, Sept. 8, 1906. 
