274 COMPOSITE. Helianthus. 



oled ; uppermost commonly alternate : tracts of the involucre from oblong-ovate to lanceolate 

 and either acute or acuminate, glabrous, shorter than or sometimes equalling tlie yelloivish 

 or at length brownish disk ; its bracts nearly glabrous : rays about an inch long, oblong. — 

 Chapm. n. Suppl. 629. H. angustifoUus, var. with broader leaves aud yellow dislc, Cbapm. 

 Fl. 229; Curtiss, distrib. 1437. — N. and E. Florida, Chapman, Palmer, Garber, Curtiss; 

 flowering late. 

 ~TT. ciliaris, DC Glaucous : stems a foot or two high, very leafy : leaves nearly all opposite 

 and sessile, lanceolate, varying to ovate-lanceolate or to linear, thickish, witli undulate or 

 repand margins, either very smooth aud naked, or hispidulous with some scattered bristles, 

 at least along the margins : bracts of the involucre ovate or oblong, obtuse or abruptly 

 mucronulate, hirsutely ciliate : chaff of the brownish disk pubescent at tip : rays few or 

 several, not surpassing the disk, sometimes none. — Prodr. v. 587 ; Gray, PI. Fendl. 84, PI. 

 Wright, i. 108. — Linsecomia glauca, Buckley in Proc. Acad. Philad. 1861, 458. — Low and 

 brackish ground, S. W. Texas, on the Eio Grande, and Arizona, Berlandier, Wright, Thurber, 

 &c. (Adj. Mex.) 



•^ '^~ Stems somewhat hirsute, scapiform and monocephalous : leaves roundish : chaff of recep- 

 tacle with entire cuspidate-acuminate tips: rays commonly wanting: akenes rather flat, emar- 

 ginate-2-toothed at summit: an anomalous .species. — Echinomeria, Nutt. 



' H. radula, Torr. & Gray. Leaves hirsute or hispid, denticulate, tfiplinerved, mostly 

 sessile ; radical orbicular, 2 or 3 inches long, in a rosnlate cluster ; cauline 2 or 3 pairs near 

 the base of the (foot or two high) simple stem, obovate with narrowed base, or above 

 reduced to some narrow and minute ones : involucral bracts broadly lanceolate or oblong, 

 acute, brownish-purple, as is the disk : the few rays when present little exserted : akenes with 

 the unusually acute margins produced above more or less into a sort of tooth ; pappus small. 

 — Fl. ii. 321. Rudheckia radula, Pursh, Fl. ii. 575. R. npi'tala, Nutt. Jour. Acad. Philad. 

 vii. 77. Echinomeria apefala, Nutt. Trans. Am. Phil. Soc. vii. 356. — Low pine barrens, 

 Georgia, Alabama, and Florida. 



-)— H— -I— Stem and (mostly opposite and tviplinerved) leaves more or less hispid, hirsute, or 

 scabrous (or forms of the last species sraootlier) : chaff of receptacle entire or some 3-toothed at 

 the apex, pointless : rays numerous and conspicuous. 



-H* Disk of the head dark purple or brownish. 



"■H. heteroph^Uus, Nutt. Stem slender, 1 to 3 feet high, naked above, bearing a single 

 showy head : leaves hispid, entire ; radical oval to spatulate-oblong ; cauline 3 or 4 pairs 

 and some minute ones above, narrowly lanceolate or linear, sessile, the lower Avith long 

 tapering base : bracts of the involucre lanceolate, acuminate, ciliate : rays about 20, inch and 

 a half long. — Jour. Acad. Philad. vii. 74; Hook. Comp. Bot, Mag. i. 98, partly; Torr. & 

 Gray, 1. c. — Low pine barrens, Georgia to Florida and Louisiana, toward the coast. 



' H. atrorubens, L. Stems stouter, sometimes leafy, sometimes few-leaved, 2 to 4 feet high, 

 hearing few or several rather small heads : leaves hispid and scabrous, vein v, commonly thin- 

 nish, from roundish-ovate or rarely cordate to oblong-lanceolate, often serrate", contracted below 

 into winged petioles, lower a span to a foot long, uppermost small and bract-like : bracts of 

 the involucre oval or obovate, obtuse, ciliolate : rays 10 to 16, rarelv inch long. — Spec. ii. 906, 

 & ed. 2, 1279 (Dill. Elth. t. 94; Martyn, Hist. PI. Ear. t. 20) ; Ait. Kcw.' iii. 250; Michx. 

 Fl. ii. 140, in part; Torr. & Gray, 1. c, not Lam., nor Bot. Mag., Bot. Peg., &c. //. sjiarsi- 

 folins. Ell. Sk. ii. 415. //. silphioides, Nutt. Trans. Am. Phil. Soc. vii. 366. — Opeu woods, 

 Virginia to Florida, Arkansas, and Louisiana. 



-H. rigidus, Desf. A foot or two (rarely 6 to 8 feet) high, rig-id, sparingly branched : leaves 

 \try firiu-coriaceous and thick, both sides hispidulons-scabrous, shagreen-like, entire or 

 serrate, lightly tripliuerved but indistinctly and sparingly veined ; h)wc"r oblong and ovixte- 

 lanccolate, attenuate at base into short winged petioles; upper mostly lanceolate: heads 

 comparatively large, showy (disk three-fourths inch high) : involucre pluriserially imbricated ; 

 its bracts mainly ovate, obtuse or :u''utish, rigid, apprcssed, den,sely and minntelv cili:ite: 

 rays numerous, generally inch and a half long : akenes oblong-obovate, 3 lines long : pap- 

 pus of two large ovate-lanceolate jialea-, and sometimes t\\o or four rather stcmt interme- 

 diate palex ! more commonly none. — Cat. Hort. Par. ed. 3, 184 : Torr. & (ilray, Fl. ii. 322. 

 //. atrorubens, Michx. 1. c, in part; Bot. Peg. t. 508; Bot. .Ahig. t. 2668; DC. Prodr. v. 5Sfi. 

 //. diffasus, Sims, Bot. Mag. t. 2020. //. Missuricus, Spreng. &yst. iii. 618, name in place of 



