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

116. Dichrocephala L’Héritier ex Candolle, Arch. Bot. (Paris). 2: 517. 1833.

鱼眼草属 yu yan cao shu

Authors: Yilin Chen & Luc Brouillet

Dichrocephala benthamii

Credit: Harvard University Herbaria

Herbs, annual, prostrate. Leaves alternate, lyrate or entire. Capitula small, disciform, orbicular or oblong, in racemiform or paniculiform synflorescences, rarely solitary. Involucre patelliform; phyllaries 2- or 3-seriate, margins narrowly scarious, fimbriate. Receptacle globose or obconic, swollen, alveolate, naked. Florets fertile; marginal female many seriate, white or yellow, without tube, lamina narrowly cylindric, funnel-shaped, campanulate, or ovoid to urceolate, 2- or 3-lobed; disk florets bisexual, yellow or reddish, tube short, limb narrowly campanulate, 4- or 5-lobed; anther base obtuse; style branch tips lanceolate. Achenes obovoid, compressed, glabrous, sometimes basally and apically glandular, green apically, margins strongly 2-ribbed, of female florets sometimes faintly so. Pappus absent, of disk florets ± coroniform, sometimes with 1 or 2 short setae.

Four species: Africa, tropical Asia; three species in China.

1 Corolla of female florets shortly funnel-shaped or campanulate; phyllaries ± puberulent; receptacle distinctly swollen, obconic, apex acute.   1 D. chrysanthemifolia
+ Corolla of female florets cylindric or ovoid to urceolate; phyllaries glabrous; receptacle globose, apex flat   (2)
2 (1) Female floret corolla narrowly cylindric; leaves lyrately pinnatilobate, base attenuate into winged petiole.   2 D. integrifolia
+ Female floret corolla ovoid or urceolate; leaves usually pinnate, rarely lyrately pinnatilobate, base expanded, auriculate-clasping, sessile.   3 D. benthamii

Lower Taxa


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