300 COM POSIT As STENOTUS. 
nent beneath: heads paniculate, terminating short branchlets or some- 
times rather congested: involucre obovate, 4-5 lines high, its bracts broad- 
ish-linear, imbricated in several ranks, the outer successively shorter, the 
short tips merely mucronate-acute: rays about 10: style appendages lan- 
ceolate, rather obtuse, about as long as the stigmatic portion: pappus 
barely sordid. Base of the Casca e Mountains of Oregon and Washington. 
P. tenuicaulis <Aplopappus tenuicaulis Eaton Bot. King. 16. Silky-to- 
mentose or at length nearly glabrous stems 6-14 inches long, very slender, 
curved and ascending from a fusiform caudex: leaves all narrowly lanceo- 
late, rather rigid, the radical 2-38 inches long, 2-3 lines wide, entire or 
sparingly denticulate, narrowed into a very short petiole; cauline ones 
sessile by‘a dilated base: heads small, 2-6, racemose, on slender peduncles: 
involucre hemispherical, the broadly oblong scales tomentose. on the back 
and rather obtuse rays about 20: disk-flowers numerous: style-branches 
linear-lanceolate, hispid, twice as long as the stigmatic portion: achenes 
silky-villous; pappus white, of unequal almost plumulose capillary brist- 
les. In alkaline meadows, Eastern Oregon to Nevada. 
8 STENOTUS Nutt, Trans. Am. Phil, Soc. vii, 334. 
Dwarf herbaceous plants with linear or lanceolate 1—3-nerved 
rigid persistent entire alternate or crowded leaves and middle- 
sized heads of yellow flowers. Involucre hemispherical, its 
scales oblong-ovate to. orbicular, 1-neryved, membranaceous with 
scarious margins, of equal or moderately unequal length, closely 
appressed and imbricated. Receptacle. flat, alveolate-toothed. 
Heads many-flowered, radiate. Rays 8-12, ligulate, pistillate, 
oval to oblong: disk corollas perfect, dilated toward the summit, 
deeply 5-toothed, Style branches broad and flat with the pu- 
bescent appendages various in form. Achenes oblong-turbinate, 
densely silky villous. Pappus commonly bright w:ite, of num- 
erous soft unequal densely scabrous capillary bristles. 
S. Lyallii Aplop:ppus Lyallii Gray. Viscid puberulent: stems 6-12in- 
ches high, equally leaty upto the head: leaves oboyate-spatulate to ob- 
lanceolate: heads solitary at the ends of the stem or branches, radiate: 
involucre hemispherical 6 lines high, glandular, its bracts acute, sometimes 
2 or 3 of the outermost oblongand more foliaceous: rays 15-20, conspicuous: 
style appendages not longer than the stigmatic portion: achenes and 
ovaries glabrous or nearly so. Alpine region of eastern Uregon to British 
Columbia, Montana and Colorado. ; 
S. lanuginesus Greene Eryth. ii, 72. Aplopappus lanuginisus 
Gray. Floccose-tomentose: stems 8-1!) inches high from creeping root- 
stocks, leafy: leaves soft, narrowly spatulate or the upper linear, the 
sparse uppermost almost filiform, 1-2 inches long: heads solitary, termin- 
al, radiate, many-flowered: involucre 6 lines high; its bracts lanceolate, 
acute or acuminate thin, nearly equal in 2 series. outer barely greenish: 
style appendages elongated-subulate: achenes sericeous-canescent  A\l- 
pine in the mountains of eastern Oregon and Washington to Montana. 
S Brandegei. Aplopappus Brandegei Gray. Stems 8-1" inches high 
from a tufted caudex, cinereous-pubescent or pubernlent, and the inyolucre 
lanuginose- tomentose: radica leaves obovate or spatulate or roundish, 6-8 
lines long, contracted into aslender petiole; cauline few and sparse, 
small, * lines long, oblong or ianceolate: involucre 3-4 lines high, its 
lanceolate bracts loose, nearly equal: style appendages triangular-subu- 
“late: young achenes’ hirsute-pubescent: pappus rather scanty Moun- 
tains of Washington in the Yakima district. 
