506 COMPOSITAE. Vou. IIL. 
3. Hymenopappus tenuifolius Pursh. 
Uy, Woolly White Hymenopappus. 
(> a it Y NN Fig. 4531. 
Ve Hymenopappus tenuifolius Pursh, Am. Sept.742. 1814. 
Biennial; stem lightly tomentose, or at length 
glabrate, 1°-2° high, slender, leafy below, corym- 
bosely branched and nearly naked above. Lower 
and basal leaves petioled, 1-3-pinnately parted 
into linear or filiform lobes, woolly pubescent be- 
neath, at least when young; upper leaves much 
smaller and less compound; heads numerous, co- 
rymbose, 4”-6” broad; bracts of the involucre 
obovate-oblong, usually densely tomentose; co- 
rolla white, its lobes slightly shorter than the 
throat; achenes densely villous-pubescent; pappus 
of several oblong to ovate, ribbed or nerved scales, 
which are about as long as the width of the top 
of the achene or shorter. 
On dry prairies, South Dakota to Nebraska, Kansas 
and Texas. June—Sept. 
4. Hymenopappus flavéscens A. Gray. 
Woolly Yellow Hymenopappus. 
Fig. 4532. 
Hymenopappus flavescens A. Gray, Mem. Am. Acad. 
(II) 4: 97. 1849. 
Biennial; stem densely white-woolly, at least 
when young, 1°-24° high, leafy, branched above. 
Leaves I-3-pinnately parted or divided into linear 
segments; heads numerous, usually larger than 
those of the preceding species; involucral bracts 
obovate to ovate with greenish white margins; 
corolla yellow or yellowish, the lobes about equal- 
ling the throat, achenes short-villous; pappus scales 
spatulate, shorter than the slender corolla-tube. 
In sandy soil, Kansas to Texas, Arizona and north- 
ern Mexico. 
5. Hymenopappus filifélius Hook. Low 
Tufted Hymenopappus. Fig. 4533. 
Hymenopappus filifolius Hook. Fl. Bor. Am.1: 317. 1833 
Perennial from a deep woody root; stems usually 
tufted, woolly when young, sometimes glabrate when 
old, densely leafy toward the base, usually naked or 
nearly so and sparingly branched above, 6’~18’ high. 
Leaves tomentose when young, the lower and basal 
ones petioled, 1-3-pinnately parted or pinnatifid into 
narrowly linear, somewhat rigid lobes; heads com- 
monly few, 6-12” broad; bracts of the involucre 
obovate-oblong, usually densely woolly, their tips 
whitish; corolla yellow or yellowish, its lobes much 
shorter than the throat; achenes densely villous; 
pappus scales costate, short. 
On prairies and in dry rocky soil, Saskatchewan to 
north Dakota, Montana, Nebraska and Colorado. June- 
ept. 
