AND GENERA OF PLANTS. 367 



Hab. Rocky Mountains and plains of the Platte. A low, perennial, simple stemmed species, 

 about a foot high, leaves two to three inches long, about an inch wide. Capituli about three to five 

 (apparently) sessile. Rays about sixteen, longer than the disk, paleae somewhat obtuse, hirsute at 

 the summit, scales of the achenium rather large and wide. 



Heliantkus ^crassifoUus; % , stem simple, herbaceous, subscabrous; leaves near- 

 ly all opposite, lanceolate, acuminate at either end, serrate, above smooth, beneath, 

 very scabrous, and, as it were, shagreened; stem naked, one to three-flowered, 

 with a few small, linear leaves; involucrum closely imbricated, the scales ovate, 

 slenderly and finely ciliate: achenium subquadrangular, with sometimes four 

 scales, the two central ones smaller. 



Hab. Plains of 'Arkansa. About two feet high, the lower part of the stem very leafy, above 

 nearly naked from the sudden dimimition in the size of the leaves, the plant here and there scat- 

 tered with drops of resin. Leaves half a. foot long, or more, about an inch wide, very thick and 

 coriaceous. Rays about twenty, bidentate. Achenium pubescent above; with small scales from 

 the inner angles; discal florets as usual, enlarged and pubescent towards the base. Allied to H. 

 pauciflorus. 



Helianthus * sqiiarrosus; 2/, robust and gigantic; stem scabrous, grooved; 

 leaves lanceolate, or ovate-lanceolate, scabrous at either end, acuminate, sessile, 

 beneath softly villous and somewhat canescent, below opposite and three-nerved, 

 above alternate, margin remotely subserrulate; capitulum upon a long pedi- 

 cel; calyx squarrose, very widely spreading and coarsely foliaceous; rays nu- 

 merous, (fifteen to twenty;) palea subtridentate ; achenia smooth. H. tomento- 

 sus, Elliott, non. Michaux. 



Hab. In Georgia near Columbus: six to eight feet high: flowers three to four inches across. 

 Rays pale yellow, rather narrow. Disk brownish. Leaves a span long, one and a half to two inches 

 wide. A very showy species, and remarkable for its very leafy calyx, inner leaves linear-lanceolate, 

 the outer sometimes half as large as those on the stem. 



Helianthus ^dehilis; y., stem prostrate, nearly glabrous; leaves alternate, 

 long petiolate, deltoid-ovate, repandly serrulate, glabrous, three-nerved ; invo- 

 lucrum closely imbricate; sepals lanceolate acuminate, nearly equal, and al- 

 most smooth; capitulum long pedunculate, solitary, terminal; achenium 

 smooth; disk dark brown. 



Hab. The sea-coast of East Florida. (Dr. Baldwin.) In the Herbarium of the Academy of Nat. 

 Sci. Philad. as H. prostratiis, by Schweinitz, but very distinct from that species, having also the 

 two deciduous pappus scales of the genus without any intermediate squamellae, therefore not a 

 Vigueria. Several spreading, prostrate stems, probably from the same root. Stem brown, terete, 

 about a foot long, petiole more than an inch longer than the leaf, which is acute. Rays ten to 

 twelve. 



