322 COMPOSITA ERIGERON 
RACCHARIS 
spatulate-lanceolate to oblong, often sparingly serrate: heads rather 
numerous, small, involucre with few or no bristley hairs. Dry open 
grounds, British Columbia to California and across the continent. 
§ 2 TrimorpHma, Gray Sy. Fl. i, Pt. 2, 219. ~ Rays incon- 
spicuous or slender, numerous, sometimes not exceeding the 
disk: within them a series of rayless filiform pistillate flowers: 
leaves entire or nearly so. 
E. acris L. Spe. ii, 863. More or less hirsute-pubescent: stems 10-14 
inches high from a biennial or perennial root, the larger plants branching 
and bearing several or numerous somewhat j aniculately d sposed heads: 
leaves pubescent or glabrate, entire the radical and lower cauline spatulate, 
mostly obtuse, 1-3 inches long, petioled: upper cauline, mostly oblong or 
oblanceolate, obtuse or acutish, sessile: involucre hemispheric, its bracts 
linear, hirsute; rays numerous, purple equalling or exceeding the brownish 
pappus: tubular pistillate flowers filif.rm, numerous: pappus simple or 
nearly so, copious. Alaska to Oregon, the Rocky mountainsand Labrador. 
Var.. Drebachensis Blytt. Norg. Fl. 561. Somewhat glabrous or 
even quite so, involucre green, at most hirsute only at base, often minute- 
ly viscidulous: rays slender somewhat slightly exserted sometimes 
minute and filiform and shorter than the pappus. Katzebue Sound to 
Oregon and New Brunswick. 
Var. debilis Gray Syn. Fl. 1, Pt. 2, 220. Sparsely pilose: stems 3-12 
inches high from an apparent'y perennial root, slender: leaves bright green; 
radical obovate or oblong; cauline spatulate to lanceolate, short: heads 
1-3 in a terminal cluster, 4-5 lines high: brae’s of the involucre sparsely 
hirsute below, the smooth attenuate tips spreading: rays in flower rather 
conspicuously supassing the disk. On moist cliffs, higher parts of the 
Cascade mountains to Hudson’s Bay and Labrador. 
§ 3. Cmnorus, Nutt. Gen. ii, 148. Rays of the small and 
narrow semingly discoid heads inconspicuous, little if at all 
surpassing the disk or pappus; the narrow ligule always shorter 
than its tube: disk-flowers sometimes few, with usually 4-toothed 
corollas: pappus simple. | | 
E. canadensis L. Sp. ii, 863. From sparsely hispid to almost 
glabrous: stems strict, 1-10 feet high, with numerous narrowly paniculate 
heads, or in depauperate plants only a few inches high and with few 
scattered heads: leaves linear, entire or the lower spatulate and incised or 
few-toothed, commonly more or less hispid-ciliate: heads usually very 
numerous about 2 lines wide: rays whie usually a little exerted and sur- 
passing the style branches. Common in waste places and fields through- 
out North America. 
22 BACCHARIS L. Gen. n. 949, 
Dicecious shrubs with alternate leaves and small paniculate or 
corymbose heads of tubular flowers. Involucre regularly imbri- 
cated, of squamaceous bracts. Receptacle mostly flat and naked, 
rarely chaffy. Flowers of the staminate heads with tubular- 
funnelform 5-cleft .carollas, subulate style-branches with the 
stigmatic portion obsolete and overy abortive; corolla of the 
pistillate flowers reduced to a slender truncate or minutely 
toothed tube, shorter than the filiform style. Achenes 5-10- 
striate. Pappus of the satminate flowers of a series of scabrous 
