322 eOMPOSIT^ ERIGBKON 



nACCHABia 



Bpatulate-lanceolate to obloof;? often sparingly serrate : heads raider 

 numerous, small, involucre with few or no , bristley hairs. Dry open 

 grounds, British Columbia to California and across the continent. 



§ 2 Trimorph^a, Gray Sy. Fl. i, Pt. 3, 219. Rays incon- 

 spicuous or slender, nunaerous, sometiines not exceeding the 

 disk : within them a series of rayless ifiliform 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, 'tfa^ larger plants branching 

 and bearing several or numerous somewhat 7 anidilately d sposed heads : 

 leaves pubescent or glabrate, entire the radical and lower cauline spatulate, 

 mostly obtuse, 1-3 inches long, petioledi upper cauline, mostly oblong or 

 oblanceolate, obtuse or acutish, aetsile: invplacre hemispheric, its bracts 

 linear, hirsute; rays numerous, purple equalling or exceeding the brownish 

 pappus: tubular pistillate flowers filiform, nutuerous: pappus simple or 

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



Var. Droebachensis Blytt. Norg. Fl. SSI. Somewhat glabrous or 

 even quite so, involucre green, at most hirsute qflily at base, often minute- 

 ly viscidulous : rays slender somewhat eli^Mly exserted sometimes 

 minute and filiform and shorter than the .'pappus, Katzebue Sound to 

 Oregon and New Brunswick. 



Tar. debllis Gray Syn. Fl. 1, Pt. 2, 220. Sparsely pilose : ptema 3-12 

 inches high from an apparently 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: brad's of the involucre sparsely 

 hirsute below, the smooth attenuate tips sprekding : rays in flower rather 

 conspicuously supassing the disk. On moist eli3s, higher parts of the 

 Cascade mountains to Hudson's Bay and habr^doi. 



I 3. CffiNOTUs, 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, '#ith usually 4-toothed 

 corollas: pappus simple. 



E. canadensis L. 8p. ii, 863. From tpfweely hispid to almost 

 glabrous: stems strict, 1-10 feet high, with numerous nairowly 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 white usually a little exerted and sur- 

 passing the style branches. Common in waste places and fields through- 

 oat North America. 



22 BACCHARIS L. Gm. n. 949. 



Dioecious shrubs with alternate leaves and small paniculate or 

 corymbose heads (ii tubular flowers. Involucre regularly imbri- 

 cated, of squamaceous bracts. Receptack mostly flat and naked, 

 rarely chaffy. Flowers of the stamiiiate heads with tubular- 

 funnelform 5-cleft carollas, subulate style -branches with the 

 stiginatic 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 



