Asta CoMPostT A! 311 
EUCEPHALUS 
over 2 feet high, rather stout: cauline leaves mostly narrowed below and 
with more or less auriculate half-clasping base : the lower 5 inches long by 
an inch broad, not petiolar-contracted: heads terminating, simple leafy 
branches: rays 8-9 lines long. Between Kootenay and Pend Orielie, Wash- 
ington. 
A. Hendersoni Fernald. Stems rather slender, loosely tomentose 
above, branching near the top, leafy: upper leaves lanceolate, more or 
less acuminate, entire, one-nerved, glabrous except the midrib, auriculate. 
clasping by a broad base, 2-4 inches long: heads numerous, in an ample 
panicle: bracts of the involucre linear, acute, green or the inner wi h whi- 
tish base, all of nearly equal length, equalling or surpassing the disk, 4-5 
lines long: rays numerous, 8-i0 lines long by a jine broad, bright purple. 
Eastern Washington to Idaho. 
18 EUCEPHALUS Nutt. trans. Am. Phil, Soc. vii, 298. 
Perennial leafy-stemmed herbs without radical leaves and 
solitary or panicled heads of purple, blue or white ray-flowers 
in a single series, not very numerous, pistillate: disk flowers 
tubular and perfect. Bracts of the turbinate campanulate in- 
yolucre regularly imbricated in 3-4 series, dry and chartaceous, 
ovate, concave, somewhat carinate, the innermost about the 
length of the disk, the outer successively shorter but similar. Al- 
veola of the receptacle lacerate. Appendages of the style lanceo- 
late, acute. Achenes oblong, compressed. Pappus copious, 
rather longer than the corolla: the bristles unequal; the longest 
ones sometimes thickened upwards. Stems very leafy,the lower 
leaves being reduced to bract-like scales, or bristles. 
E. elegans Nutt. Trans. Am. Phil. Soc. vii, 298. Aster elegans 
. & G. Stems slender, 1-3 feet high, mostly scabro puberu- 
lent, leaves thickish, lanceolate, 1-2 inches long, erect, closely sessile, the 
upper apiculate-mucronate: heads several at the summit of simple stems 
or branches, 4-5 lines high: bracts of the involuc:e a'l close and conspicu- 
ously woolly-ciliate, barely acute, outer ovate, none with pointed tips: 
rays rather few, about 4 lines long: style appendages linear-subulate, 
hardly acute, equaling the stigma ic portion: achenes flat, hirsute, becom- 
ing glabrate at maturity. On mountains of Eastern Oregon and Wash- 
ington to Montana, Wyoming and Nevada. 
E: Engelmannii Greene Pitt. iii, 54. Aster Engelmanti Gray 
Commonly, rather tall and _ robust, green, slightly puberulent 
to glabrous: leaves thin, ovate-oblong to broadly lanceolate, 
2-4 inches long,loosely veined, the larger sometimes with a few 
small acute teeth, the upper commonly tapering at apex into a slender or 
cuspidate acumination: heads fully half inch high, hemispherical, either 
racemosely disposed on slender axillary peduncles or somewhat thyrsoid- 
cymose: bracts of the involucre mostly acute or acuminate: some outer 
ones loose, narrow and partly herbaceous, or with loose pointed tips; in- 
ner ones purp'ish rays about 6 lines long: style,appendages attenuate-sub- 
ulate: achenes obovate-oblong with narrowish summit. In the higher 
mountains of Oregon and Washington to the Rocky mountains, 
_E. serrulatus Greene l. c, 55. ‘‘Stoutish and rather tall, vivid green 
and scabrous, the leaf margins even serrulate-scabrous under a lens: 
leaves linear-lanceolate, 2 inches long, acute, marked by a very strong and 
conspicuous white mid-vein and some reticulation of the surface: heads 
few, large as in the preceeding, but bracts very different, being narrow 
