COMPOSITE. (COMPOSITE FAMILY.) 183 



* Disk from hemispherical to ovoid, black or dull brown : akenes small, quadran- 



gular, wholly destitute of pappus : leaves undivided : involucre soon reflexed. 



1. R. hirta, L. Rather stout, 1 to 3 feet high, rough-hispid and hirsute: 

 leaves from oblong to lanceolate, sparingly serrate or nearly entire, 2 to 5 

 inches long, the lower narrowed into margined petioles : rays when well devel- 

 oped an inch or two long, golden yellow, sometimes deeper colored toward 

 the hase: disk at first nearly black, in age dull brown, becoming ovoid in 

 f ru it. Dry and open ground, from Colorado to the Saskatchewan and east- 

 ward across the continent. 



# # Disk from r/Iobular to cylindrical, yellowish or brownish : akenes comparatively 



large, somewhat compressed, with a crown-like pappus: involucre loose and 

 foliaceous but not usually rejlexed. 



H- Rays few or several, inch or two long, drooping, pure yellow : disk dull yellowish ; 

 the tip of the chaffy bracts canescent : pappus a short 4-toothed or nearly entire 

 crown: nearly all the leaves cleft or divided: stems branching. 



2. R. laciniata, L. Glabrous and smooth, sometimes minutely scabrous, 

 at least on the margins and upper face of the leaves : stem 2 to 7 feet high, 

 branching above : leaves veiny, broad, incisely and sparsely serrate ; radical 

 commonly piunately 5 to 7-foliolate or nearly so, and divisions often lacini- 

 ately 2 to 3-cleft ; lower cauline 3 to 5-parted, upper 3-cleft, and those of the 

 branches few-toothed or entire Moist ground, from Montana to Arizona 

 and New Mexico, and eastward across the continent. 



t- -t- Rays wanting : disk brownish ; the tip of the chaffy bracts puberufent : re- 

 ceptacle bodkin-shaped : scarious cup-shaped pappus very conspicuous : stems 

 stout, simple. 



3. R. OCCidentalis, Nutt. Nearly glabrous and smooth, or somewhat 

 scabrous-puberulent : leaves undivided, ovate or ovate-lanceolate, acuminate, 

 entire, or irregularly and sparingly dentate, 4 to 8 inches long ; upper sessile by a 

 rounded or subcordate base ; lower abruptly contracted into a short winged 

 petiole, rarely a pair of obscure lateral lobes: disk in age becoming l inch 

 long, and akenes 2 lines long. Trans. Am. Phil. Soc. vii. 355. Mountains 

 of Wyoming to Idaho and Oregon. 



4. R. montana, Gray. Smoother, somewhat glaucous, tall and very 

 stout: leaves 8 to 12 inches long, pinnately parted into 3 to 9 oblong-lanceolate 

 divisions, or the lanceolate uppermost cauline with 2 to 4 narrow lateral lobes : 

 disk cylindraceous or cylindrical, at length often 3 inches long and an inch in 

 diameter : akenes with the deep coroniform pappus 3 or 4 lines long. Proc. 

 Am. Acad. xvii. 217. Mountains of Colorado. 



35. LEPACHYS, Raf. 



Herbs, with piunately parted leaves, and terminal long-peduncled showy 

 heads, the drooping rays yellow or partly brown-purple : truncate inflexed tips 

 of the chaff pubescent : disk yellowish, becoming darker. 



1 L. columnaris, Torr. & Gray. Scabrous, 1 or 2 feet high, branching 

 from the base : divisions of the cauline leaves 5 to 9, from oblong to narrowly 

 linear, sometimes 2 to 3-cleft : rays commonly an inch or more long, normally 



