996 Compositae. 
1372. (1.) Helianthus debilis Nutt. Trans. Am. Phil. Soe. VII 
(1841), p.367. — Torr. and Gray Flor. II, p. 320. — Helianthus 
praecox Engelm. and Gray Plant. Lindh. I, p.13.°— An annual 
plant, more or less scabrous. Stems branched at the base, the 
branches decumbent or spreading, 30—90 cm long; leaves mostly 
alternate; blades deltoid or somewhat hastate to ovate-lanceolate, 
4—8 cm long, acute or acuminate, repand or shallowly and broadly 
toothed, broadly cuneate to cordate at the base, the petioles glabrous 
or sparingly pubescent, bracts of the involucre lanceolate or linear- 
lanceolate, 8—10 mm long, acuminate, or subulate; ray-flowers 
several; ligules yellow, 1—1,5 cm long; disk 1,5—2 em broad. — 
Flow. March to April. 
M. ma. Naturalized in gardens in Alexandria and Ramle. 
Widely distributed in America. 
1373. (2.) Helianthus argophyllus Torr. and Gray Flor. I 
(1838), p. 318. — Rev. Hort. (1857), p.431. — Aschers.-Schweinf. 
Illustr. Flor. d’Eg., p. 89 no. 548. — An annual plant clothed with 
white, often somewhat floccose silky wool. Stems 50—1,20 cm long, 
branched; leaves alternate except some of the lower ones; blades 
various, those of the lower leaves very broad, those of the upper 
leaves ovate or lanceolate, 5—15 cm long, acute, undulate, or some- 
what serrate, rounded or cordate at the base, petioled; bracts of the 
involucre oblong, ovate or fiddle-shaped, spreading, 1—1,5 em long, 
acuminate, sometimes sharply so; ray-flowers several; ligules 2,5 to 
3,5 cm long; disk 2—4 cm broad. — Flow. March to April. 
M. ma. M. p. N.d. N.f. N. v. D. i. Often cultivated and 
naturalized, especially at Ismailia. 
Also known from Texas. 
1374. (3.) Helianthus annuus L. Spec. Plant. I (1753), p. 904. 
— Lam. Illustr., p.706. — Aschers.-Schweinf. Illustr. Flor. d’Eg., 
p. 89. —— Helianthus lenticularis Dougl. Bot. Reg., tab. 1225. — DC. 
Prodrom. V, p. 586. — Helianthus macrocarpus DC. Prodrom. V, 
p. 586 (a race of the garden Sunflower with larger and light-coloured 
achenes). — An annual plant, markedly pubescent. Stems hispid or 
hirsute, 1—2 m high or higher in cultivation, branched above; leaves 
mainly alternate; blades broadly ovate, 7—30 em long, or smaller 
above, usually slightly acuminate at the apex, decidedly toothed, 
those of the lower leaves cordate at the base, those of the upper 
cuneate; ligules of the ray-flowers 2,5—5 em long; disk flat, 3 to 
5 cm broad. All the parts are often much larger in cultivated 
forms. — Flow. January to March. 
