Lepachys. COMPOSITE. 263 



R. heteroph^lla, Torr. & Ghat. Cinereous-pubescent : stem 2 to 4 feet high, slender, 



bearing several somewhat corymbose short-peduncled small heads •. leaves coarsely and 



rather obtusely serrate ; some of the radical cordate-obicular 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 : disk in fruit globose and barely 



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



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



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



scarious cupulate-coroniform pappus very conspicuous : stem stout, neany simple, 2 or 3 feet 



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



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 inch and a half long, and akenes 2 lines long. — Trans. Am. Phil. Soc. vii. 355 ; 

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

 Oregon; first, coll. by Nulla!). Sierra Nevada in Butte Co., California {Bidwell), &c. 



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 upper- 

 most 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. — Rocky Mountaius of Colorado, E. Hall, Brande- 

 gee, the latter in the Elk Mountains. 



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

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

 bracts, which 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 by solitary rather showy heads : leaves 

 strictly one-ribbed, reticulate-veiny, from entire to sparingly serrate ; lower oblong-spatulate 

 and sessile by a tapering base ; upper oblong and ovate with cordate-clasping base.- involucre 

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

 brown_-purple base : disk brownish, cylindraceous in age : receptacle slender : akenes small, 

 minutely rngulose-roughened transversely between the sulcate stria;. — Act. Hafn. ii. 29, 

 t. 4 (1793) ; Schkuhr, Handb. t. 259 ; Pursh, Fl. ii. 573. R. amplexifolia, Jacq. Ic. Rar iii. 

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

 not Michx. Dracopis amplexicaulis, Cass. Diet. xxxv. 273; DC. Prodr. v. SSS^Torr. & 

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



96. LfiPACHYS, Raf. (Aem'?, a scale, and iraxv's, thick, the upper part 

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

 pinnately divided or parted alternate leaves, and terminal long-peduneled 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 resin. Fl. summer. — 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, Tore. & Gray, 1. c. Strigulose-pubescent 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, 



