450 ORDER 10. COMPOSITE. 



hds. small, but larger than in No. 22. Character otherwise as in that species. 

 Alleghanies of Va. and Car. 



25 H. longifoliua Ph. Very smooth, often clustered; las. chiefly opposite, long- 

 lance-lineat', acute, entire, obscurely 3-veined, sessile, the radical somewhat serrate 

 and petioled ; scales ovate, acute, the outer with spreading tips ; rays 8 to 10, 

 short. Western Ga. St. 4 to 7f high, smooth and dark purple. Hd. not larger 

 than in No. 22. A rare species. 



55. HELIANTHEL'LA, Torr. & Gr. (Lat. diminutive of Helianthus.) 

 Involucre, flowers and pales {is in Helianthus ; achenia compressed, 4- 

 angled. one or more of its angles slightly winged and produced into a 

 persistent, awn-like or chaffy appendage. It Lvs. scattered. 



H. tenuifolia Torr. & Gr. Rough, slender; Ivs. narrowly linear; scales lance- 

 subulate, spreading, hairy; rays 10 to 12; pales 3-lobed; ach 2-toothed at the 

 summit. Sand hills, Gadsdeu Co., Fla. (Chapman). 



56. ACTINOM'ERIS, Nutt. (Gr. dttriv, a ray, juepo?, a part ; par- 

 tially radiate.) Heads many-flowered, ray flowers 4 to 14, rarely 0; 

 involucre scales foliaccous, subequal, in 1 to 3 series ; receptacle conical 

 or convex, chafty ; achenia compressed, flat, obovate, mostly winged, 

 awned. 2 Plants tall, with 3 veined, serrate Ivs. Hds. corymbous. 

 Rays when present yellow 



* Stem winged with the decurrcnt, alternate leaves Nos. 1 3 



* Stem not at all winged, with mostly opposite leaves No. 4 



1 A. helianthoidea Nutt. St. hirsute, winged except near the base ; lys. alter- 

 nate, ovate-lanceolate, decurrent, acuminate, serrate, hirsute and scabrous ; co- 

 rymb contracted; rays 6 14, long, irregular; scales erect. In barrens and prai- 

 ries, Western States. It is a rough plant, with the aspect of a Heliauthus. Stem 

 2 4f high. Leaves 2 t' by G 14", grayish. Rays 1' long. Fls. all yellow. 

 Jn., Jl. (Verbesina MX.) 



2 A. squarrosa Nutt. St. tall, winged, branching above, somewhat pubescent ; 

 Ivs. alternate, often opposite, oblong-lanceolate, elongated, tapering to each acute 

 or acuminate end, scabrous, decurrent ; hds. small ; scales spreading or reflexed ; 

 rays 4 8; regular, short; receptacle very small. Dry, alluvial soils, W. N. Y. 

 and W. States, common. An unsightly weed, 5 lOf high. Leaves 6 14' by 

 1 3', sharply serrate, especially the lower. Rays ^' long. Fls. all yellow. Aug. 

 Oct. (Coreopsis alternifolia L.) 



3 A. alba Torr. & Gr. St. narrowly winged, rarely wingless ; Ivs. glabrous but 

 rough, narrowly lanceolate, acuto at each end, finely serrate ; scales lance-linear, 

 few, in about 2 rows; rays none; ch. broadly winged, with 2 spreading awns; 

 cor. white. S. Car., Ga. to La., common in moist, rich soils. St. 4 to 6f high. 

 Lvs. 5 to 8' long. Hds. in small corymbs, globular. Aug. Oct. (A. squarrosa, 

 p. Nutt.) 



4 A. nudicaulia Nutt. Rough, hairy; st. wingless, naked and branched above; 

 Ivs. ollong, unequally serrate, acute, closely sessile, the upper bract-like ; hds. pani- 

 culate, corymbed; scales pubescent, in 2 or 3 rows; rays 7 to 12, linear; ach. 

 broad-obovate, narrowly winged. Ga. (Feav, Pond), Fla., Ala., in sandy soil. 

 St. 2 to 3f high. Lvs. 2 to 3' long. Ach. l""long. Awns erect. Fls. all yellow. 



Rays 1 to !' long. Sept., Oct. 



57. COREOP'SIS, L. TICK-SEED. (Gr. Kopig, a bug, tty^, appear- 

 ance ; from the concavo-convex, 2-horned achenia.) Heads many- 

 flowered, radiate, rays about 8, rarely ; involucre double, each 6 to 

 12-leaved; receptacle chaffy; achenia obcompresscd, cmarginate, each 

 commonly with a 2-toothcd, upwardly hispid pappus, sometimes with 

 none. Lvs. mostly opposite. Rays usually yellow ; disk fls. yellow or 

 dark purple. 



