Botanical Survey of India | Flora of India

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Herbs, annual or perennial. Leaves alternate, entire or dentate. Heads heterogamous, rayed, solitary, terminal or on leaf opposed peduncles. Involucre campanulate; involucral bracts multiseriate, narrow with scarious margins; outer smaller. Receptacle flat or subconvex, naked. Ray florets female, fertile, 1 - 2-seriate, 2 to 3-toothed. Disc florets bisexual, fertile, slender, 5-toothed. Achenes small, obscurely ribbed, tip rounded. Pappus hairs of ray florets few or absent; of disc florets few or many.

Tropical Asia and Africa; ca 6 species, 3 in India.



KEY TO THE SPECIES


1a. Involucral bracts glabrous, erect, acute; ligules lanceolate; ray florets epappose 2. Pentanema indicum
b. Involucral bracts hairy, acuminate with recurved tips; ray florets pappose 2
2a. Lower leaves subsessile; leaf apices acuminate; plants sparscly pubescent 1. Pentanema cernuum
b. All leaves sessile with auricled base; leaf apices obtuse to subacute; plants softly woolly 3. Pentanema vestitum


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