324 COMPOSITiE. Helianthus. 



/?. Texas, Drummond! July-Sept. — Stem slender, 1 to 3 feet high, nearly 

 leafless, except towards the base. Lower leaves 3-5 inches long, 1-2 broad, 

 usually roughish-pubescent or hirsute beneath; the petioles 5-8 inches long. 

 Rays 12-15, nearly an inch in length. ChalF of the receptacle nearly gla- 

 brous, somewhat 3-tooihed at the summit, acute.. Achenia hairy towards the 

 summit and along the angles. Pappus of 2 lanceolate-subulate awns. — 

 Resembles H. heterophyllus, Nutt., but an enlirely distinct species, with a 

 yellow disk. The leaves of the Texan specimens are more coriaceous, and 

 ajipear glabrous to the naked eye and nearly smooth to the touch ; but under 

 a lens they are observed to be clothed with very fine and short appressed 

 hairs. 



14. H. cinereus : clothed with a close somewhat scabrous and cinereous 

 pubescence; stem somewhat naked above; leaves ovate-oblong, acutish, 

 appressed, serrulate, contracted at the base, sessile; the lowermost narrowed 

 into a winged petiole ; peduncles slender; scales of the involucre lanceolafe, 

 canescent ; immature achenia villous at the summit. 



[3.? SuUivantii : larger and more branched; stem scabrous-hirsute; 

 leaves obscurely serrate, acute, the uppermost ot'ten alternate. 



Texas, Drummond ! I3. Near Columbus, Ohio, Mr. Sullivant ! — Stem 

 2—3 fed high, virgate, sometimes a little branched, bearing few heads nearly 

 as large as those of H. mollis. Leaves rigid, somewhat Iriplinerved, veiny, 

 clothed with a fine slrigose pubescence, which is cinereous on the lower, but 

 more scabrous on the upper surface : the lowest leaves 3-5 inches long, in- 

 cluding the narrowed base or petiole ; the upper small and remote. Chaff 

 of the receptacle pubescent and more or less 3-toothed at the apex; the 

 middle lobe acuminate. Young achenia villous at the summit (under a 

 lens), and somewhat so on the angles. 



15. H. mollis (Lam.) : stem villous ; leaves ovate or lanceolate-ovate, 

 acuminate, with a somewhat cordate and clasping base, serrulate or entire, 

 cinereous-pubescent and slightly scabrous above, tomentose-canescent and 

 reticulated beneath; scales of the involucre lanceolate, villous-canescent ; 

 mature achenia nearly glabrous. — Lam.! diet. 3. p. 81 ; DC. ! prodr. b. p. 

 587 ; not of Willd. Sfc. H. canescens, Michx. ! fl. 2. p. 140. H. pubes- 

 cens, Willd. ! spec. 3. p. 2240 (excl. syn. Vahl.) ; Bot. reg. t. 524 ; Ell. ! 

 sk. 2. p. 418; Hook.! comj?. to bot. mag. \. p. 98. 



Barrens and dry prairies from Ohio ! Indiana ! and the western part of 

 Georgia ! to Missouri ! Louisiana ! and Texas ! Aug.-Sept. — A well 

 marked, canescently villous species, 2-4 feet high, simple or sparingly 

 branched at the summit, bearing rather large showy heads on stout pedun- 

 cles. Leaves all closely sessile, broadest at or near the more or less cordate 

 base, 3 to 6 inches long, often with both surfaces canescent, or the upper 

 slightly scabrous, the lower very soft. Scales of the hemispherical involu- 

 cre either broadly or narrowly lanceolate, acute or acuminate, somewhat un- 

 equal. Rays 15-25, an inch long. Chaff of the receptacle entire, the tri- 

 angular summit canescent. Pappus of 2 lanceolate pointed chaffy scales, 

 somewhat fringed. 



***** Perennial : heads middle-sized : rays S-2A : involucre irregularly iyndrica- 

 ted; the scales loose, or with squarrose-spreadingoftenfoliaceous summits, as long as 

 the yellow disk {achenia glabrous). — Corona-solis. 



t Leaves commonly alternate or scattered, the lower often opposite, feather-veined, 

 sometimes obscurely triplinerved. 



16. H. Nuttallii : stem smooth ; leaves alternate, the lower opposite, nar- 

 rowly lanceolate-linear, acute, mostly entire, scarcely petioled, both sides 



