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FOC | Family List | FOC Vol. 11 | Euphorbiaceae

14. Aporosa Blume, Bijdr. 514. 1825.

银柴属 yin chai shu

Authors: Bingtao Li & Michael G. Gilbert

Scepa Lindley.

Trees or shrubs, dioecious, rarely monoecious; indumentum of simple hairs. Leaves alternate; stipules caducous; petiole apex usually glandular; leaf blade simple, margin entire or sparsely denticulate, venation pinnate. Inflorescences axillary, solitary or clustered spikes or racemes, many flowered, male inflorescences longer than female, bracteate; pedicels short. Male flowers apetalous, without disk; sepals 3-6, nearly equal, membranous, imbricate; stamens 2 or 3, rarely 5 or 8; filaments free, as long as or longer than sepals; anthers small, longitudinally dehiscent; pistillode very small or absent. Female flowers: sepals 3-6, shorter than ovary; ovary 2(-4)-locular; ovules 2 per locule; styles 2(-4), apex shallowly bifid, rarely papillate or fringed. Fruit a drupelike capsule, irregularly dehiscent when mature and dry, 1- or 2-seeded. Seeds not strophiolate; endosperm fleshy; cotyledon flattened and broad. x = 13.

About 80 species: India and Sri Lanka to SW China, Indonesia, and Malaysia; four species in China.

1 Ovary and fruits pubescent or tomentose   (2)
+ Ovary and fruits glabrous   (3)
2 (1) Leaves mostly broadly ovate or elliptic, base truncate or cordate, sometimes obtuse, abaxially uniformly hairy; bracts semiorbicular; male sepals obovate; capsule tomentose.   1 A. villosa
+ Leaves mostly narrowly ovate or elliptic, base usually ± cuneate, abaxially glabrous or pilose only along veins; bracts ovate-triangular; male sepals oblong-ovate; capsule thinly pubescent.   2 A. dioica
3 (1) Branches pubescent when young; leaf blade papery to leathery, margin entire; female sepals 4.   3 A. planchoniana
+ Branches glabrous when young; leaf blade membranous to thinly papery, margin sparsely glandular-crenulate; female sepals usually 3.   4 A. yunnanensis

Lower Taxa


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