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FOC | Family List | FOC Vol. 11 | Euphorbiaceae

61. Baliospermum Blume, Bijdr. 603. 1826.

斑籽木属 ban zi mu shu

Authors: Bingtao Li & Michael G. Gilbert

Shrubs or subshrubs, dioecious or monoecious; indumentum of simple hairs. Leaves alternate; petiole usually long, apex or base of leaf blade 2-glandular; leaf blade simple, penninerved. Flowers in axillary panicles; male inflorescences many flowered, female ones few flowered, rarely female flowers inserted at base of male inflorescences (B. solanifolium); inflorescences branching. Male flowers: sepals (4 or)5 or 6, membranous, round, imbricate; petals absent; disk annular, lobed or 5-glandular; stamens 10-20, or more; filaments free; anthers 2-locular, longitudinally dehiscent; pistillode absent. Female flowers: sepals 5 or 6, sometimes accrescent; petals absent; disk annular; ovary 3- or 4-locular; ovules 1 per locule; styles 3, bifid; stigmas bifid. Capsules 3-valved.

About eight species: China, India, Indonesia, Malaysia, Myanmar, Thailand, Vietnam; five species (two endemic) in China.

Recent studies of Baliospermum (e.g., Phattarahirankanok & Chayamarit in Chayamarit & Welzen, Fl. Thailand 8, 1: 120. 2005) indicate that there are rather fewer species than had been supposed. Three of the Chinese species are rather poorly known.

1 Plants monoecious; inflorescences usually leafy, female flowers axillary or inserted at base of male inflorescences; male disk glands connate into an urceolate structure.   1 B. solanifolium
+ Plants dioecious; female inflorescences prominently pedunculate, male a narrow panicle; male disk glands free   (2)
2 (1) Young branches ferruginous-tawny tomentose, glabrescent   (3)
+ Young branches glabrous or puberulent, glabrescent   (4)
3 (2) Leaves ovate, oblong, elliptic, or elliptic-lanceolate, 3-11 cm wide; stamens 16-20.   2 B. bilobatum
+ Leaves narrowly lanceolate or narrowly elliptic, 2.5-3.5 cm wide; stamens 10-15.   3 B. angustifolium
4 (2) Leaves ovate-cordate to broadly ovate, 15-25 × 10-16 cm, base cordate, rarely broadly cuneate to rotund; young stem glabrous.   4 B. yui
+ Leaves elliptic, narrowly elliptic, or oblong to lanceolate, 9-16 × 3-8 cm, base cuneate to broadly cuneate; young stem puberulent.   5 B. calycinum

Lower Taxa


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