Lepachys. COMPOSITE. 263 



R. heteroph^Ua, Torr. & Gray. Cinereons-pubescent : stem 2 to 4 feet high, slender, 



bearing .sc\ cral somewhat corymbose short-peduncled small heads • leaves coarsely aud 



rather obtusely serrate; some of the radical cordate-ol^icular and undivided, others with 



3 ovate undivided leaflets, the terminal petiolulate , lower cauline 3-5-parted ; upper all ovate, 



coarsely toothed, nearly sessile : rays an inch or less long: (link in fruit globose and barely 



half-inch high. — Fl. ii. 312; Chapm. Fl. 228. — Swamps, Middle Florida, Chapman. 



•)— H— Rays wholly wanting: proper tube of disk-corollas very short; disk brownish, from ovoid 



to columnar; its chaffy bracts puberulent at tip: receptacle bodkin-sliaiied : akenes rather large: 



scarious cupulate-coroniforni pappus ver\- conspicuous: stem stout, nearly simple, 2 or 3 feet 



high: involucre foliaceous, variable. — § Acosmla, Nutt. 



R. OCCidentalis, Nutt. Nearly glabrous and smooth, or somewhat scabrous-puberulent : 

 leaves uudivi.ied, 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 

 bec(nning inch and a lialf long, and akeucs 2 lines long. — Trans. Am. Phil. Soc. vii. 353; 

 Torr. & Gray, 1. c. — Woods along streams, Rocky Mountains of Wyoming to Idaho aud 

 Oregon; fir.st. coll. by Nulfa/I. Sierra Nevada in Butte Co., California (Bichcell), &c. 



R. montana. Gray. Smoother, somewhat glaucous, tall and very stout: leaves (8 to 12 

 hiclies long) pinnately parted into 3 to 9 oblong-lanceolate divisions, or the lanceolate u]>per- 

 most cauline with 2 to 4 narrow lateral lobes : disk cylindraceous or cylindrical, at length 

 often 3 iuciies long and an inch in diameter : akenes with the deep coroniform pappus 3 or 4 

 lines long. — Proc. Am. Acad. xvii. 217. — Rocky Mountains of Colorado, E. Ball, Brande- 

 gee, the latter in tlie Elk Mountains. 



§ 2. Dracopis. Akenes nearly terete, not angled, minutely striate, destitute 

 of pappus, inserted by an obliquely lateral areola, aud subtended by navicular 

 bracts, wbich are more or less deciduous in age. — Dracopis, Cass., DC., &c. 



R. amplexicaulis, Vahl. A foot or two high from an annual root, smooth and glabrous, 

 somewhat glaucous, leafy ; the branches terminated bj^ solitary rather showy heads : leaves 

 strictl}^ one-ribbed, reticulate-veiny, from entire to sparingly serrate; lower oblong-spatulate 

 and sessile by a ta])ering base ; upper oblong and ovate with cordate-clas])ing base, involucre 

 of a few small foliaceous bracts : rays oblong, half-inch or more long, yellow, often with a 

 brown-])urple base : disk brownish, cylindraceous in age : receptacle slender : akenes small, 

 minutely rugulose-roughened transversely between the sulcate stria?. — Act. Hafu. ii. 29, 

 t. 4 (1793) ; Schkuhr, Ilaudb. t. 259; Pursh, Fk ii. 573. A', ampte.afolia, Jacq. Ic. Rar iii. 

 t. 592 (1793). R. perfoliata, Cav. Ic. t. 252. R. spathulata, Nutt. Gen. ii. 178 (excl. hab.), 

 not Michx. Dracojx's amplexicaulis, Cass. Diet. xxxv. 273; DC. Prodr. v. 558; Torr. & 

 Gray, Fl. ii. 316. — Low grounds, Louisiana and Texas. (Adj. Mex.) 



96. LEPACHYS, Raf. (Ae7ri<?, a scale, and -rraxix;, tbick, ibe upper part 

 of tbe bracts of the receptacle thickened.) — Herbs (Atlantic N. American) ; with 

 pinnately divided or jiarted alternate leaves, aud terminal long-peduncled showy 

 heads, the drooping rays mostly broad, yellow or partly brown-purple ; the disk 

 at first grayish, the truncate inflexed tips of the chaff canescently pubescent ; 

 disk-corollas yellowish turning fuscous. Heads redolent with anisate odor when 

 bruised. Chaffy bracts commonly marked with an intra-marginal purple line or 

 spot, containing volatile oil or I'esin. Fl. simimer. — Less. Syn. 225 ; Torr. & 

 Gray, Fl. ii. 313. Lepachys & Ratibida, Raf. in Jour. Phys. 1819, 100. Obelis- 

 caria, Cass. Diet. xlvi. 401 (1825) ; DC. Prodr. v. 558. 



§ 1 • Akenes with convex or obscurely angled faces : root perennial. — Obelis- 

 caria, Cass. 



* Style-tips lanceolate-subulate : rays large and long. 



L. pinnata, Torr. & Gray, 1. c. Strigulose-pubesceut and scabrous, 3 to 5 feet high, 

 slender : leaves 3-7-foliolate, and the leaflets lanceolate or broader, usually sparsely serrate, 

 sometimes lobed, the uppermost commonly confluent : rays pure yellow, oblong-lanceolate, 



