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FOC | Family List | FOC Vol. 20-21 | Asteraceae | Pentanema

1. Pentanema indicum (Linnaeus) Y. Ling, Acta Phytotax. Sin. 10: 179. 1965.

苇谷草 wei gu cao

Herbs, annual or perennial, up to 1 m tall. Stems erect, branched, 1-4 mm in diam., striped, pubescent or rarely glabrous. Leaves sessile, oblong-lanceolate or linear-lanceolate, abaxially yellowish green and hispidulous or densely white tomentose, adaxially deep green and strigillose, base truncate or auriculate and subclasping or hastate, margin entire or shallowly serrulate, apex acuminate. Capitula solitary and terminal; peduncles 3-5 cm. Involucre broadly campanulate, ca. 6 mm; phyllaries in numerous series, outer ones subulate, herbaceous, pubescent and glandular, inner narrowly linear, glandular, innermost 4-5 × as long as outer. Receptacle hemispheric, glabrous. Florets yellow, glandular in outer surfaces. Ray florets in 1 series; lamina narrow, 6-10 × 1-1.2 mm. Disk florets numerous; corolla ca. 4 mm. Achenes terete, 0.6-0.7 mm, densely pubescent, apex truncate. Pappus white, or yellowish later, of ca. 15 bristles, ca. 4 mm in disk florets, absent in ray florets. Fl. Sep-Apr.

Waste fields, grassy slopes; 700-2000 m. Guangxi, Guizhou, Sichuan, Yunnan [India, Myanmar, Nepal, Pakistan, Sri Lanka, Thailand, Vietnam; tropical Africa].

1 Leaves broader, 3-8 cm × 3-10 mm, base truncate or auriculate, subclasping, margin entire, abaxially yellowish green, hispidulous.   1a var. indicum
+ Leaves narrower, 2-9 cm × 2-8 mm, base hastate, apex obtuse, margin entire or shallowly serrulate, abaxially densely white tomentose.   1b var. hypoleucum

Lower Taxa


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