392 COMPOSITA octiurotemaies 
UROPAPPUS 
2 lines long: paleae of the pappus deltoid or triangular-ovate, abruptly 
tipped witn an awn or bristle 8 or 9 times longer. Alluvial grounds, Brit- 
ish Columbia to Northern California. 
S. leptosepala Nutt. 1. c. Microseris leptosepala Gray \ Stems slen- 
der, a foot or so high: leaves from linear to lanceolate and from entire to 
attenuate-pinnatifid, all attenuate: heads comparatively small and few- 
flowered ; involucre 6-10 lines high, of 6-12 lanceolate acuminate principal 
bracts and a few small, ovate, abruptly acuminate ones at their base: 
achenes slender-columnar: paleae of the pappus ovate-lanceolate, or nar- 
rower, tapering gradually from the base: into an awnor4or 5 times as 
long. Moist ground, British Columbia to Califor nia. 
S. Bolanderi Greene 1. ¢ Microseris Bolanderi Gray. Stems slender, 
1-2 feet bigh: leaves from narrowly linear-lanceolate to somewhat spatu- 
late, entire or with a few small salient linear lobes, 6-12 inches long: in- 
volucre 6-9 lines high, its bracts all gradually lanceolate-attenuate froma 
broadish base, or some small outermost abruptly acumina‘e: paleae of 
the pappus little exceeding the breadth of the achene, broadly ovate, 
mostly obtuse, tipped by the long slender awn. In swamps near the 
coast, Washington to Cali ornia. 
S. Howelli Greene |. c. Microsesis Howellii Gray. A foot or more 
high from a fusiform root slender bearing solitary or 2 or 3 heads: leaves 
elongated-linear and attenuate, some bearing a few attenuate reflexed 
lobes: involucre half-inch high, narrow, 15-20-flowered, its bracts all acu 
minate; the inner oblong-lanceolate, aud all nearly equal; the outer much 
shorter and mostly ovate achenes 3 lines long, narrower at base: pappus of 
8 or 10 conspicuous and firm lanceolate palez 2-3 lines long, ti ped with 
a denticulate-scabrous awn of hardly greater length.  Hillsides about 
Waldo. southeastern Oregon. 
101 UROPAPPUS Nutt. 1. c. 425. 
MICROSERIS § CALAIS Gray. 
Subcaulescent annuals with laciniately lobed or pinnatifid 
leaves and erect heads of yellow flowers on long scape-like strict 
and erect peduncles which are thickened above. Involucre cam- 
panulate, its numerous bracts imbricated in 2 or more series, the 
outer successively shorter, all thin and scarious margined. Re- 
ceptacle flat, more or less alveolate-chaffy in the centre. Achenes 
terete, 8-10-costate, glabrous with scabrous costa, the basal ecall- 
osity not angled. Palez of the pappus 5, elongated, flat, hispid 
and short-awned at the apex. 
U. linearifolius Nutt. 1. c.  Microseris linearifolia Gray. Scapes or 
peduncles 6-24 inches high: leaves linear, coarsely few-toothed or pinnati- 
fid, 2-6 inches Jong, more or less villous-pubescent when young: achenes 
black, slender, tapering above almost to a beak, 6-8 lines long: palez of 
the pappus silvery-white, linear oblong 4-8 lines long, deeply notched 
above and bearing slender awns barely half their length. Dry hillsides, 
Brit. Columbia to California and New Mexico. 
U. macrochetus Greene Pitt. iii, 137. Microseris macrochexta Gray. 
‘* Scapes or peduncles sometimes 2 feet high: involucre narrow, 8-10 lines 
h gh, its bracts attenuate-acuminate : paleze of the pappus thin, small, cleft 
quite to the middle from the first, bearing a long and weak awn. South- 
west Idaho to California. ”’ 
