450 Order 70 COMPOSITE. 



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

 Alleghanies of Va. and Car. 



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

 lance-linear, 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 as in Helianthus ; achenia compressed, 4- 

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

 persistent, awn-like or chaffy appendage. — 2£ Lvs. scattered. 



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

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

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



56. ACTINOM'ERIS, Nutt. (Gr. dicrlv, a ray, fi^pog, a part; par- 

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

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

 or convex, chaffy ; achenia compressed, flat, obovate, mostly winged, 2 

 awned. — 2f. Plants tall, with 3 veined, serrate lvs. Hds. corymbous. 

 Kays when present yellow 



* Stern winged with the decurront, alternate leaves Nos. 1 — 8 



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



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

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

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

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

 2 — 4f high. Leaves 2 — 4' by G — 14", grayish. Hays 1' long. Fls. all yellow. 

 Jn., Jl. (Yerbesina Mi.) 



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

 lvs. 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. Loaves 6 — 14' by 

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

 — Oct. (Coreopsis aiternifolia L.) 



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

 rough, narrowly lanceolate, acute at each end, iinely serrate ; scales lance-linear, 

 fow, in about 2 rows; rays none; ach. broadly winged, with 2 spreading awns; 

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

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

 /3. Nutt.) 



4 A. ntidicaulis Nutt. Hough, hairy; st. wingless, naked and branched above: 

 lvs. oblong, 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. (Feay, Pond), Fla., Ala., in sandy soil. 

 St. 2 to 3f high. Lvs. 2 to 3' long. Ach. 1" long. Awns erect. Fls. all yellow. 

 Kays 1 to 1 \' long. Sept., Oct. 



57. COREOP'SIS, L. Tick-Seed. (Gr. koqi<;, a bug, 8y>ig, appear- 

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

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

 12-leaved; receptacle chaffy ; achenia obcompressed, emarginate, each 

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

 none. — Lvs. mostly opposite. Rays usually yellow ; disk 13s. yellow or 

 dark purple. 



