Botanical Survey of India | Flora of India

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Blumea membranacea DC., Prodr. 5: 440. 1836; Hook.f., Fl. Brit. India 3: 265. 1881.


Herbs, annual; stems simple or branched from base, erect, 0.15-1.5 m tall, pilose particularly in the younger parts. Leaves ovate-lanceolate or obovate, base tapering, acute, margins serrate-dentate, 4-18 x 1-6 cm, the upper entire, the lower lyrately lobed, all hairy on both surfaces. Heads in terminal lax panicles, clustered at the ends of branches, 5-8 mm in diam., peduncle hairy, glandular, up to 3 cm long. Involucral bracts pruplish-tinged, slightly longer than florets, linear, 1-9 mm, pubescent, reflexed, inner with scarious margins. Receptacle flat or slightly convex, alveolate, glarbous. Corolla of bisexual florets yellow, tubular, 4-6 mm long, 5-lobed; lobes acute, pubescent; corollas of female florets filiform, 4-5 mm long, 2-3 -lobed, glabrous. Achenes brown, oblong, ribbed, pubescent. Pappus white, up to 5 mm long.

Notes. Blumea membranacea DC. is a very variable species. Hooker (1881) segregates this under 6 varieties. Randeria (1960), however, merged all these varieties under Blumea membranacea DC. Further B. jacquemontii of Hook. f. has been reduced to a variety of B. membranacea. Randeria's treatment is followed here.



KEY TO THE VARIETIES


1a. Plants slender, pubescent; heads 5-6 mm in diam.; involucral bracts herbaceous 20.2. membranacea
b. Plants robust, strigose; heads 7-8 mm in diam.; involucral bracts rigid 20.1. jacquemontii


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