Adenostemma
J.R. & G. Forster
Herbs, small or large, glabrous or glandular pubescent; stems usually fistulose.
Leaves usually opposite or upper alternate, variously shaped, sessile or petioled. Heads
homogamous, corymbose, 10 - 60 flowered. Involucral bracts 10 - 30, sub 2-seriate,
sometimes connate at base, spreading on maturity. Corolla tubular, regular, usually hairy
or glandular without; limb 5-toothed. Anthers glandular tipped, base obtuse. Style arms elongated, dilated above. Achenes angled, slightly curved, smooth, tuberculate or
muricate. Pappus hairs 3 - 5, often clavate or ending in a knob.
Chiefly American; ca 20 species, 1 in India.
Literature. GRIERSON, A.J.C. (1972). Critical Notes on the Compositae of Ceylon. Ceylon J. Sci. (Bio. Sci.) 10: 42 - 60. PANIGRAHI, G. (1975). Adenostemma (Compositae) in the Indian Region. Kew Bull. 30: 647 - 655.
Chiefly American; ca 20 species, 1 in India.
Literature. GRIERSON, A.J.C. (1972). Critical Notes on the Compositae of Ceylon. Ceylon J. Sci. (Bio. Sci.) 10: 42 - 60. PANIGRAHI, G. (1975). Adenostemma (Compositae) in the Indian Region. Kew Bull. 30: 647 - 655.
