306 CO MPOSIT A TOWNSENDIA 
) / . SERICOCARPUS 
the ray -ometimes triangular. Pappus: a’ single series of long 
awns or of conrse and rigid bristles or in the ray reduced to 
squamelle or paler. r ) 
T. ‘arryi Eaton Am “at. viii, 212. Stems erect, stout, naked and 
pedunculiform.a ove, 2-6 inches high, the taller forms sometimes branch- 
ing: leaves mu stly spatulate: bracts of the very vroad involucre lanceolate, 
thinnish, with rather soft attenuate tips or the outer barely acuminate: 
achenes narrowly obovate canesvently pubescent the hairs simple or many 
of them 2-dentate at tip. (| appus of ray-flowers plurisetose, like that of 
the disk. !daho to \ yoming and Montana 
T. florifer Gray Proc. Am. Acad xvi, 84. ‘inereous-hirsute: stems 
rather slender, 4-10 inches long, leafy: leaves linear or the lowest lanceo- 
late-spatulate, acute, mostly apiculate-acuminate: heads rather large, pe-- 
dunculate: bracts of the involucre linear-lanceolate not promiuentiy acum- 
inate nearly equal: achenes oblong-obovate, pubescent: pappus of numer- 
ous setose barbellulate bristles. On sandy banks anc arid plains of the 
Columbia. 
16 SER QGUCARPUS Nees \st. 148. ” 
Perennial herbs with alternate commonly entire and sessile 
leaves, and small livads of white flowers usually fascicled in a 
terminal compact cyie. © eads 12-15-flowered, the rays about 
5, (stant. Braets of the obovate-oblong or turbinate-cylindri- 
cal involucre closely imbricated in several series, nerveless or 
obscurely 1-nerved, the lower portion cartilaginous, appressed, 
the apex herbaceous, often spreading. Keveptacle small, alveo- 
late, the aly ola toothed or lacerate-ciliate. Apendages of the 
style lanceolate-subulate, minute:y hispid, longer than the stig- 
matic portion. Achenes obpyramidal, short, densely silky. 
Pappus simple, composed of rather numerous and rigid unequal 
scabrous bristles, some of them thickened upward. 
S rigidus | indl, !look. Fl. ii, 14. Minntely scabrous: stems slender, 
1-2 feet high, mostly simple, leafy: jeayes rigid, oblong spatulate obtuse, 
often mucronate, entire, somewhat 3-nerved, the margins ciliate-scabrous 
10-12 lines long: heads about 15 flowered, clustered in small compact cory- 
mbs: bracts of the turbinate involucre narrowly oblong or linear, 1-nerved, 
the inaer ones about equalling the disk,. somewhat scarious; the outer 
shorter and with somewhat sqnarrose greenish tips: rays but little if at all 
exserted achenes: when mature about half as longas the white pappus, 
slender, not very densely silky. On Cry ridges Oregon and Washington to 
the } ierra Nevadas in California. , 
S.- Oregonensis . Nutt. Trans. Am, thil. Soc. vii, 302 Nearly glab- 
rous; stems rather stout, 2-5 feet high, corymbosely branched above; 
leaves broadly lanceolate, acutish entire 1-neryed, scabrous 1-2 inches 
long by 6 lines broad, thickish, narrowed below: heads about 15-flowered, 
clustered in small compact corymbs: bracts of the turbinate inyolucre ob- 
long-linear 1-nerved: rays conspicuously exserted: achenes slender, fully 
half as long as the white pappus, slender, not very densely silky. On dry_ 
or grayelly plains western Oregon and Washington. 
