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

134. Heteroplexis C. C. Chang, Sunyatsenia. 3: 266. 1937.

异裂菊属 yi lie ju shu

Authors: Yilin Chen & Luc Brouillet

Herbs, perennial, climbing or erect. Leaves alternate, cauline, shortly petiolate, margin entire or serrulate, pinnately veined. Capitula disciform, solitary or 2-4-fascicled at ends of branches, shortly pedunculate or sessile. Involucre cylindric or cylindric-campanulate; phyllaries numerous, 5- or 6-seriate, imbricate, ovate to ovate-oblong. Receptacles flat, alveolate, glabrous. Florets fertile. Ray florets female, 1-seriate, 4-7, lamina fine, apex 3-toothed; disk florets bisexual, 4-6, yellow, limb narrowly campanulate, lobes 5, unequal, outer 2 longer; stamens 5, exserted; anther base obtuse; style branch tip triangular. Achenes oblong or oblong-obovoid, sparsely strigillose; achenes of ray florets slightly compressed, angled adaxially, slightly convex abaxially, 1-ribbed on both sides; achenes of disk florets 2-ribbed on both sides. Pappus 1-seriate, of yellowish white, subequal, barbellate bristles.

● Three species: China.

One of us (Brouillet) has not seen specimens of this genus.

1 Stems and branches densely gray puberulent, eglandular; leaves lanceolate to oblong-lanceolate, adaxially scabrous, abaxially densely white villous.   3 H. sericophylla
+ Stems and branches gray hairy and glandular; leaves lanceolate-elliptic or oblong-lanceolate or lanceolate, both surfaces scabrous, abaxially glandular   (2)
2 (1) Involucre 5-5.6 × 3-4 mm; ray florets ca. 7, disk florets ca. 3; abaxial leaf surface glandular.   1 H. vernonioides
+ Involucre ca. 4 × 2-3 mm; ray and disk florets 4; both leaf surfaces densely glandular.   2 H. microcephala

Lower Taxa


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