IUCN threat status:

Not evaluated

Comprehensive Description

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Description

 Perennial herbs. Stems erect, surface pilose-villose. Leaves simple, alternate or in rosette, sessile or petiolate; lamina obovate, oblanceolate, puberulous glandular; margin crenate, slightly serrate, dentate to entire; apex acute or obtuse, base cuneate to attenuate, chartaceous. Capitulescences terminal and axillary, spicate. Capitula discoid, tubular, clusters supported by foliaceous bracts, homogamous, florets bisexual and fertile. Phyllaries 8, in 2 series, decussate, persistent, oblong, outer surface puberulous. Florets 4; corollas white, glabrous, lobes 5, zygomorphic. Anthers 5, syngenesious, apical appendages acute, anther bases not calcarate. Styles white, 2-branched, inner surface covered with stigmatic papillae, outer surface covered with sweeping hairs reaching to below style bifurcation. Achenes usually clavate, 10-ribbed, pubescent, carpopodium present. Pappus with 2 unequal contorted bristles. Pollen lophate, 3-porate, without micropuncta.  One species is recognized in Thailand.

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Creative Commons Attribution 3.0 (CC BY 3.0)

© Sukhonthip Bunwong, Pranom Chantaranothai, Sterling C. Keeley

Source: PhytoKeys

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