COLEOSANTHUS. COMPOSITE. | 293 
heads large, solitary, on elongated somewhat leafy branches: involucre 
40-5\.-flowered, the scales in several series, outer ones ovate, inner ones 
linear, acute, style-branches club-shaped, exserted: achenes with a double 
row of minute bristles along the striz not glandular: pappus obscurely 
plumose. Sandy bottoms and rocky gulches, eastern Washington to Utah. 
+ + Barely pubescent or glabrate perennials: heads not viscid: 
leaves slender-petioled, at least the lower ones opposite. 
C. grandiflorus O Ktze. 1 c¢. Brickellia grandiflora Nutt. Puber- 
ulent or almost glabrous: stems 2-3 feet high, paniculately branched: 
leaves broadly or narrowly deltoid-cordate or the upper deltoid-lanceolate, 
coarsely dentate-serrate with an entire usually acuminate apex, 1-4 inches 
long: involucre about 40-flowered, its bracts papery and scarious when 
dried, the short outer ones ovate, the inner ones oblong-linear, obtuse or 
acutish or some exterior ones with Joose subulate acuminations: pappus 
white; achenes sparingly setulose toward the summit. On hills along 
streams, Oregon to the Sierra Nevadas, Montana and Arizona. 
x * . Heads 3-25-flowered not over 6 lines long: pappus-hristles 
scabrous or not manifestly barbellate: heads sessile or short-pedun- 
cled, terminating short leafy branchlets or in axillary clusters forming 
a spiciform paniculate or interrupted thyrsus. 
+ Involucre naked at base, all the bracts dry and chartaceous, 
glabrous and smooth, the outermost short and appressed, wholly des- 
titute of green tips. 
C. (alifornieus O Ktze. 1. ¢. Brickellia Californica Gray, Minutely 
puberulent: stems 2-3 feet high; virgatelv branched: leaves ovate, obtuse, 
rarely subcordate, somewhat crenate-dentate, commonly an inch or less 
long, mostly surpassed by the small clusters of heads, these rather spic- 
ately glomerate, forming an uninterrupted strict thyrsus: involucral br- 
acts al] obtuse or the innermost linear ones abruptly acute, short outer- 
most ones oval and ovate: heads 10-20-flowered, 4-5 lines high. On rocky 
banks of the Rogue River to California, Nevada and Arizona. 
Pare Involucre of firmer bracts the outer with greenish and some- 
what spreading tips, outermost loose and herbaceous and passing into 
the small leaves of the branchlets. 
C. microphyllus O. Ktze, l.c. Brickellia microphylla Gray  Viscidly 
pubescent and glandular: stems 12-18 inches high, much branched from a 
woody base: leaves: alternate, short petioled, ovate, coarsely toothed 4-7 
lines long, those of the branchlets much smaller and sessile, heads small, 
15-20-flowered, clustered at the end of the branchlets: involucral bracts 
imbricated, in many rows. outer ones ovate, herbaceous with squarrose tips, 
inner ones erect, lanceolate, acute: pappus scabrous: achenes slizhtly setu- 
lose. Eastern Oregon to California, Nevada, Colorado and Montana. 
Tribe 11. ASTEROIDE. Heads either heterogamous and radiate, 
the ligulate ray flowers feminine or rarely neutral, or homogamous 
with the flowers all hermaphrodite and tubular or rarely the female 
flowers with filiform corolla and no ligule or in Baccharis dio-cious 
and the female corollas all filiform. Receptacle seldom paleaceous. 
Corolla of the hermaphrodite flowers regularly 65-lobed, rarely 4- 
lobed. Anthers obtuse und entire or barely emarginate at base. 
Style branches of hermaphrodite flowers flattened, conspicuously 
margined by the stigmatic lines, and extending into a hispid or 
papillose appendage. Pappus various or sometimes none. Leaves 
mostly alternate. Disk flowers usually yellow. | 
