322 COMPOSITE EfcioaftoK 



BACCHARlS 



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 TrimorphjEA, 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. Spc. 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 nlifrm, numerous: pappus simple or 

 nearly so, copious. Alaska to Oregon, the Rocky mountains and Labrador. 



Var. Droebachensis 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. l,Pt. 2, 220. Sparsely pilose: Ftems 3-12 

 inches high from an apparency perennial roo f , 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. C^enotus, 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 : leads usually very 

 numerous about 2 lines wide : rays whi e 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. 



Dioecious 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 o very 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 satminatc flowers of a series of scabrous 



