390 COMPOSITZ HYPOCHERIS 
PTILOOALAIS 
acuminate : peduncles very much thickened and hollow for 1-3 inches be- 
low the heads: Heads 2-4 inches broad, very showy: bracts of the in- 
volucre linear-lanceolate, acuminate usually much longer than the purple 
rays: achenes sometimes 2 inches long, the outer ones covered with scale- 
like tubercles especially on the ribs below. Escaped from cultivation. 
97 HYPOCHCRIS. L- Gen. n. 918. 
Mostly perennial herbs with scape-like cften branching stems, 
chiefly radical leaves and large heads of yellow flowers. In- 
volucre campanulate of somewhat herbaceous marginless bracts 
imbricated in several series. Receptacle paleaceous with soft, 
narrow and scarious scales among the flowers, Anthers sagit- 
tate. Style-branches slender, obtusish. Achenes oblong or fusi- 
form, tapering upward at least the inner ones into a beak. Pap- 
pus a series of fine plumose bristles, with or without some naked 
and shorter outer ones. 
H: radicata L Sp 811. Stems several together from a perennial 
rvot, slender,1-2 feet high, branched or rarely simple,bearing a tew scales, 
leaves oblanceolate to obovate in outline, pinnatitid-lobed to dentate, 2-6 
inches long, hirsute on both sides: involucre oblong-cylindric, about an 
inch high its bracts glabrous, or sparingly pubescent: achenes rough, all 
with very slender beaks longer than the body. In waste places, Western 
Washington to California. Naturalized from Europe. 
98 PTILOCALAIS Greene Bull. Cal. Acad, ii, 59. | 
MICROSERIS § PTILOPHORA Gray. 
Glabrous herbs from fusiform biennial roots laciniately cut 
leaves and middlesized to large heads of yellow flowers. Heads 
nodding in bud, Involucre campanulate, its bracts imbri- 
cated in several series, the inner long-acuminate the outer succes- 
sively shorter and acute. Receptacle flat, foveolate. Achenes 
linear-columnar, of the same diameter from base to summit. 
Pappus bright white, soft, of 15-20 truncate or emarginate palexw 
terminating in a long, soft-plumose capillary bristle or awn and 
often with one or more short external merely scabrous bristle. 
P. nutans Greene 1. c. Microseris nutans Gray. Stem slender, 6-18 
inches high: roots either fascicled or solitary: leaves from entire and 
spatulate-obovate to pinnately parted into narrow linear lobes: heads 8-20 
flowered, slender-peduncled : involucre cylindraceous, of 8-10 linear-lanceo- 
late gradually acuminate principal bracts and a few short calyculate ones 
below, bristles of the pappus several times longer than the oblong pale. 
In open pine woods, British Columbia to California and Montana. 
P. major Greene 1]. c. Microseris major Gray. Stout, often more 
than 2 feet high: leaves oblong lanceolate, entire or sparingly laciniate 
involucre sometimes an inch high; its lanceolate bracts imbricated in 3 
lengths. Idaho to Utah. 
99 MICROSERIS Don Phil. Mag. xi. 388. 
Acaulescent glabrous annuals with entire or laciniately lobed 
or pinnatifid leaves and rather small nodding heads of yellow 
flowers on slender peduncles. Involucre oblong-cylindraceous to 
