88 COMPOSITE. StoJcesia. 



Tribe I. VERNONIACE.^, p. 50. 



1. STOKifiSIA, L'Uer. {Miatliaii Stokes, a British botanist, coadjutor of 

 Withering : some say Dr. Win. Stokes of Dublin.) — A most peculiar genus, of a 

 single species, of local habitat; a perennial, flowering in early summer; the 

 laro-e and showy head of flowers having considerable resemblance to that of a 

 China Aster. — Benth. & Hook. Gen. ii. 234. 



S. cyanea L'I-Ier. a foot high: stem stout, at first floccose-lanate ; the few branches 

 termiuated by solitary heads : leaves glabrous, bright green, pimcticulate, thickish ; radical 

 and lower cauline entire, oblong-lanceolate, tapering into a margined petiole; upper be- 

 coming ovate lanceolate, partly clasping, and bearing toward their base some spinulose- 

 aristiform teeth ; some subtending the head and passing into the bracts of the involucre : 

 head, with the radiant marginal corollas (of an inch long), 3 inches in diameter: tlowers 

 bright purplish-blue. — L'Her. Sert. Angl. 27; Ait. Kew. ed. 2, iv. 491; Torr. & Gray, Fl. 

 ii. 60 ; Hook. Bot. Mag. t. 4966 ; Meehan, Nat. Flowers, ii. t. 13. Carthamus heris, Hill, 

 Hort. Kew. 57, t. 5. Cartesia centauroides, Cass. Bull. Philom. 1816. Centaurea Americana, 

 Hook. Comp. Bot. Mag. i. 48, by mistake. — Moist ground, in the low country, from south- 

 western part of S. Carolina to E. Louisiana : rare. 



2. ELEPHANTOPUS, Vaill., L. (Greek for Elephant's foot, which is 

 a translation of a Malabarian name of the original species.) — Perennial herbs, of 

 warm regions, extending northward almost through the Atlantic U. S. ; with un- 

 divided pinuately-veined leaves and usually bluish-purple flowers. — Benth. & Hook. 

 Gen. ii. 237. Elejjhantopus, Elephantosis, & Distreptus (Cass.), Less., DC. — 

 Our species all belong to the typical section of the genus ; with stem diehoto- 

 mously branching ; heads capitately glomerate at the summit of pedunculiform 

 branches, the compound glomerule involucrate by two or three cordate and 

 closely sessile bracteiform leaves ; and simple pappus of about 5 awns or rigid 

 bristles, with chaffy -dilated base : fl. late summer. Of the nearly related species 

 (with glabrous corolla) E. scaber belongs to the extra-American and E. mollis to 

 the American tropics. Schultz Bip., in Linnaea, xx. 514, too hastily combined all 

 the American species. 



* Stem leafy: upper cauline leaves very similar to the basal. 

 ■ B. Carolinianus, Wh.ld. Rather softly hirsute or pubescent, S(3metimes 3 feet high; 

 leaves thin, oval-obovate or ovate, creuate or repand-dentate, not rugose, nor prominently 

 veined (the larger 4 to 8 inches long and 2 to 4 wide) ; uppermost oblong : chaffy base of 

 awns of the pappus decidedly longer than the diameter of the akene, lanceolate-subulate and 

 very gradually attenuate into the awn. — Spec. iii. 2390 (exch syn.) ; Nutt. Gen. ii. 1S7; 

 EIL Sk. ii. 480; Torr. & (iray, Fl. ii. 60. E. Kmher, Walt. Car. 217, &c , not L. — Dry soil 

 in open woods, Pennsylvania to Illinois, Kansas, Texas, and Florida. 



* * Stem usually naked and scapiform: its few leaves small and bract-like; principal leaves 

 radical and flat on tlie gi-ound. 



= B. tomentosus, L- Somewhat canescently hirsute and villous ; lea\es silky-villous beneath 

 (rather than tomentose), varying from obovatc or rarely oval to narrowly-spatulate ; veins of 

 the lower surface prominent: scapiform stem a foot or tivo high: involucre of the large 

 glomerules rigid: pappus-scales about the length of the breadth of the akene, triangular- 

 subulate, attenuate into the In-istle. — Spec. ii. 814, & ed. 2, excl. syn. Browne ; Torr. & Gray, 

 FL 1. c. E. Carol iniamis, var. simplex, Nutt. Gen. ii. 187. E. iiiidlccuilis, Ell. Sk. ii. 481. 

 E. elatus, Bertol. Misc. xi. 21, t. 5. — ^'irginia and Kentucky to Flori(bi and Louisiana. 

 B. nudatus, Gray. Minutely strigoso-pabescent : leaves membraniiceons, green, at most 

 somewhat hirsute beneath, from spatulate-nbovate to oblaneeolate, not prominentlv veined : 

 glomerules smaller : pappus-scales very short, broadly deltoid, abruptly terminated by the 



