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1. A. heterophylla (Nutt.}) Greene. A small annual 12-25 cm. tall, 
its leaves variable, linear-oblanceolate or oblong,5-15 cm. long, mostly 
obtuse, entireg or more or less pinnately toothed or lobed, sparingly wodly 3’; 
peduncles ususily several, somewhat arcuate-ascending, slender, less than 
1 mn. in diameter, sparsely hairy, 5-15 cme talls involucral bracts in 
2-5 unequal series, the outermost ovate at the base, rather abruptly acum- 
inate, less often lanceolate, thinly villous, the inner thinner, more 
lanceolate, tapering less abruptly, glabrous or villous along the middle, 
12-15 ma. long at maturity; corollas pale yellow, becoming lavender in age, 
6-8 mm. long; achenes of two sorts, those of the marginal flowers 4 mm. 
long with fluted crinkled ribs, those of the middle flowers somewhat longer, 
with ribs rounded and blunt, all attenuate into threadlike beaks 8-9 mm. 
long which bear at the apex the crown of shining white pappus. 
Frequent in dry ground in the grassland. 
s E - 
Ze A. aurantiaca (Hook.} Greene. Perennial herbs with stout tap 
roots, their leaves prevailingly linear-oblanceolate, 16-50 cm. long, 
mostly 1-2 cm. wide, attenuate below, acute at the arex, sparingly denticu- 
late or entire, glabrous and rather glaucous; sometimes ciliate on the 
margins at the base of the petiole; peduncles comnonly solitary, 20-40 Cme 
tall,wooly, at the ayex; bracts 12-18 mi. long, arranged in about 5 series, 
the outer ovlong-lanceolate, o-5 ma. broad, the inner narrower, all glabrate 
but ciliate on the margins, acute; flowers rich oranse, becoming purple ir 
age, 15-18 mu. lons; achenes 5-5-6 mm. long, the beaks 6-7 mm. lions. 
2¢0 ft. 
Aidges south from Viessner's Feak, , beiberg 1402; Sandberg 86<. 
. Ae gracilens (Gray) Luntze. kerennial herbs with rather stout 
ao-roots, their leaves prevailingly linear-oblanceolate, sometimes linear, 
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-40 cm. long, 5-12 mn. vide, often entire, some @t—texet more or less 
tary, 25-40 em. tall, thinly wool? towards the base, densely so beneath 
the involucre; bracts narrowly lanceolate, acute, arranged in 2-6 subequal 
series, 2-225 cme long at maturity, ciliate towards the base, for the rest 
clabrous; flowers rich oranse, becoming purple, 12-15 mn. long; acnenes & mine 
lons, the ribs very minutely scabrous, tapering rather abruptly into a beak 
which is subequal to or somewhat shorter than the body, bearing at its apex 
the pappus. 
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