Botanical Survey of India | Flora of India

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Blumea lacera (Burm.f.) DC. in Wight, Contrib. Bot. Ind. 14. 1834; Hook.f., Fl. Brit. India 3: 263. 1881. Conyza lacera Burm.f., Fl. Ind 180. t. 59. f. 1. 1768. B. subcapitata DC., Prout 5: 439. 1836. B. lacera DC. var. cinerascens Hook.f. in Fl. Brit. India 3: 263. B. lacera DC. 1881. var. glandulosa Hook.f. in Fl. Brit. India 3: 263. 1881.

Herbs, erect, aromatic, with many stems arising from the woody base; stems branched, up to 100 cm high, densely long villous, glandular. Leaves obovate, oblong or elliptic-oblong, lyrately lobed, acute or obtuse, entire or coarsely dentate, 2-6 x 1-2 cm, glandular and densely hairy on both surfaces, narrowed to a short petiole. Heads in axillary panicles, 5-7 mm in diam., on 5- 15 mm long peduncle. Involucral bracts slightly longer than florets, linear, acute, 2-5 (-7) mm long, glandular hairy; inner bracts with scarious margins. Receptacles 2-3 mm in diam., alveolate, glabrous. Corolla of bisexual florets yellow, tubular up to 6 mm long, 5-lobed; lobes triangular, pubescent with colletters and unicellular hairs; corolla of female florets 3-4 mm long, 2-3 -lobed, glabrous. Achenes brown, oblong, angular, terete, 0.5 mm, sparsely hairy. Pappus white, 4 mm long.

Fl. & Fr. March - June (Throughout the year).

Distrib. India: Plains of India, ascending up to 600 m in the Himalayas. Uttar Pradesh, Assam, W. Bengal, Bihar, Madhya Pradesh, Orissa, Tamil nadu, Karnataka, Maharashtra and Andaman & Nicobar Islands.

Nepal, Bhutan, China, S.E. Asia, Sri Lanaka, New Guinea, Australia and Tropical Africa.

Notes. B. lacera is the most widespread and the most variable species of the genus. Many varieties were recognised by earlier workers but with overlapping characters. The species is very closely related with B. mollis and B. hieracifolia in many characters.

The plant is used medicinally as diuretic, anthelmintic, stimulant and febrifuge. It yields an essential oil.

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