Botanical Survey of India | Flora of India

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Urena lobata L., Sp. Pl. 692.1753, s.l; Masters in Fl. Brit. India 1: 329.1874.

Undershurbs, annual or perennial, erect, 0.5 - 2 m high; stems, petioles and pedicels densely minute stellate-hairy intermixed simple hairs, ultimately glabrescent. Leaves extremely variable in size and shape, 1 - 12 x 0.5 - 12.5 cm, usually ovate to orbicular, unlobed to shallowly lobed or deeply irregularly incised towards base, lobes 3 - 5 or more, dilated upwards with rounded sinuses, shallowly cordate, rounded, obtuse to acute at base, obtuse to acute or rounded at apex, serrate to crenate or entire, densely stellate- hairy on both surfaces, ultimately glabrescent; 3 - 9-nerved at base, midrib and sometimes 2 adjacent nerves with linear nectaries beneath; petioles 0.5 - 12 cm long; stipules 2 - 4 mm long, linear to lanceolate, acute. Flowers axillary, solitary or 2 - 3 in clusters; pedicels 1 - 5 mm long. Epicalyx segments closely enveloping calyx and shortly adnate to it, 3 - 10 x 1 - 3 mm, linear to lanceolate, acute, minute stellate-hairy outside, often fimbriate sericeous by appressed, simple and stellate hairs towards apex inside. Calyx tubular to campanulate, lobes 4 - 6 x 1.5 - 2 mm, ovate to deltoid, acute to acuminate, nerves somewhat prominent with nectaries at base, hairs similar to epicalyx. Corolla pink with a purple centre, 2 - 3 cm across; petals 1 - 1.5 x 0.5 cm, obovate, rounded at apex, ciliate or glabrous. Schizocarps 5 - 8 mm across, globose, glochidiate, spines with 4 - 5 retrorse, short, sharp hooks at the top; mericarps 4 - 5 mm, radially ca 4 mm, tangentially ca 3 mm, dorsally and laterally stellate-hairy and reticulate veined. Seeds 2 - 3 mm across, reniform, minutely hairy or glabrous, brown.


1a. Leaves angled or shallowly lobed; epicalyx cupular in fruit, appressed to mericarps; segments narrowly triangular 1. lobata
b. Leaves palmatilobed or palmatifid; epicalyx spreading or reflexed in fruit, segments linear to lanceolate 2. sinuata

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