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

197. Pluchea Cassini, Bull. Sci. Soc. Philom. Paris. 1817: 31. 1817.

阔苞菊属 kuo bao ju shu

Shrubs or herbs, ± aromatic. Leaves alternate, simple. Synflorescences elongate panicles or flat-topped. Capitula many flowered, disciform, usually numerous. Phyllaries imbricate. Marginal florets numerous, in several rows, filiform, female, fertile; achenes 4- or 5-angled, longitudinally grooved. Central florets far fewer than marginal ones, tubular, bisexual, functionally male; anthers obtuse at apex, tailed at base. Style entire, sometimes divided, style branches with obtuse sweeping hairs reaching below furcation; achenes often indistinct or vestigial as a small ring of basal sclerenchymatous cells of carpopodium. Pappus of basally connate, barbellate bristles in 1 row. x = 10.

About 80 species: Africa, SE Asia, Australia, Caribbean, North and South America, Pacific islands; five species (two introduced) in China.

1 Plants decumbent-ascending, herbaceous, slightly woody at base; branches glabrous or sparingly puberulent; peduncles and involucres glabrous.   1 P. pteropoda
+ Plants erect, shrubby; branches densely pubescent; peduncles and involucres tomentose   (2)
2 (1) Stems and branches conspicuously winged by decurrent leaves; capitula hemispheric (when fresh); central florets 50-60.   2 P. sagittalis
+ Stems and branches not winged; capitula campanulate (when fresh); central florets usually less than 25   (3)
3 (2) Leaves linear.   3 P. eupatorioides
+ Leaves obovate to elliptic   (4)
4 (3) Branches densely tomentose; leaves thinly papery, petiolate, margins subentire; central florets 20-25; receptacle glabrous.   4 P. carolinensis
+ Branches finely crisp hairy; leaves thickly papery, subsessile, margins dentate; central florets 2-7; receptacle densely hirsutulous.   5 P. indica

Lower Taxa


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