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166. Stilpnolepis Krascheninnikov, Bot. Mater. Gerb. Bot. Inst. Komarova Akad. Nauk S.S.S.R. 9: 207. 1946.

百花蒿属 bai hua hao shu

Authors: Zhu Shi, Christopher J. Humphries & Michael G. Gilbert

Elachanthemum Y. Ling & Y. R. Ling.

Herbs, annual. Leaves opposite or alternate, pinnatisect, few lobed or entire. Capitula hemispheric or globose, homogamous, discoid, laxly corymbose or solitary at apex of branches. Involucres hemispheric or cupular-hemispheric; phyllaries in 3-5 rows, herbaceous, margin broadly scarious. Receptacle convex-subconical, epaleate. Florets tubular, bisexual, 5-lobed, with distinct tube and ± crateriform limb. Anther obtuse at base, with apical acuminate-triangular appendage. Style branches linear, apex truncate. Achenes obliquely obovoid to narrowly obovoid-oblanceolate, densely glandular, striate. Pappus absent.

Two species: China, Mongolia; two species in China.

Oberprieler et al. (in Kadereit & C. Jeffrey, Fam. Gen. Vasc. Pl. 8: 349, 357, 364. 2007) accepted Elachanthemum as a distinct genus on the basis of the smooth pollen, which placed it in a different group of genera from Stilpnolepis.

1 Capitula 8-20 mm in diam., nodding or declined; phyllaries abaxially glabrous, without midrib; lateral leaf segments grouped at leaf base.   1 S. centiflora
+ Capitula 5-6 mm in diam.; phyllaries abaxially floccose, with green midrib; lateral leaf segments uniformly distributed along leaf.   2 S. intricata

Lower Taxa


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