Botanical Survey of India | Flora of India

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Abutilon hirtum (Lam.) Sweet, Hort. Brit. ed. 1, 53. 1826; Wight & Arn., Prodr. 56. 1834. Sida hirta Lam., Encycl. 1: 7.1783; Sida graveolens Roxb. [Hort. Beng. 50.1814, nom. nud.] ex Hornem., Hort. Hafn. Suppl. 77. 1819; Roxb., Fl. Ind. 3: 179. 1832. Abutilon graveolens (Roxb. ex Homem.) Wight & Arn. ex Wight, Cat. 13. 1833 & Wight & Arn., Prodr. 56. 1834; Masters in Fl. Brit. India 1: 327. 1874, incl. var. hirtum.


Annual herbs or undershrubs, up to 2 m high, much branched, somewhat viscid with unpleasant smell; stems, petioles and pedicels covered with long patent, simple, minute stellate and short glandular hairs. Leaves 2.5 - 12 x 3.5 - 13 cm, orbicular to broadly ovate, cordate at base, acute at apex, irregularly crenate-dentate, 7 - 9-nerved at base, pubescent with minute stellate hairs and with long simple and glandular hairs on veins beneath; petioles 3 - 20 cm long, hirsute with long patent, simple and glandular hairs; stipules 0.5 - 1 x 0.1 - 0.3 cm, linear to lanceolate, often falcate, reflexed, stellate-velu- tinous. Flowers axillary, solitary; pedicels 1.5 - 4.5 cm long, accrescent up to 5.5 cm long, jointed at 1 - 10 mm below apex. Calyx 7 - 10 mm diam., campanulate, divided to the middle, lobes 5 - 10 x 4 - 6 mm, accrescent up to 1.5 cm, ovate or deltoid, acute to slightly acuminate, somewhat reflexed in fruit, densely stellate-pubescent mixed with simple and glandular hairs, sericeous inside with simple hairs. Corolla orange-yellow with a purple centre; petals longer than calyx lobes, obcordate, rounded at apex, often emarginate, spreading, finally reflexed, ciliate at base, stellate-pubescent outside, glabrous inside. Staminal column 5 - 7 mm, yellow or dark purple, basal part conical and stellate-hairy, upper tubular part glabrous. Schizocarps 1 - 2 cm across, globular, indented at apex; mericarps 20 - 25, seperating early, 10 - 15 mm high, radially 7 - 10 mm, broadly ovate-relliform, shortly acuminate, sometimes rounded, dorsally stellate-tomentose, 3-seeded. Seeds ca 2.5 mm across, reniform, punctate by minute stellate hairs, longer stellate-hairy at the hilum, brownish black.



KEY TO THE VARIETIES


1a. Leaves ovate, irregularly and deeply serrate 3.1. heterotrichum
b. Leaves orbicular-ovate, serrulate or denticulate 3.2. hirtum


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