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FOC | Family List | FOC Vol. 13 | Rhizophoraceae

1. Rhizophora Linnaeus, Sp. Pl. 1: 443. 1753.

红树属 hong shu shu

Trees or shrubs, with aerial roots. Stipules reddish, sessile, leaflike, lanceolate. Leaves opposite or distichous; leaf blade glabrous, midvein extended into a caducous point, margin entire or serrulate near apex. Inflorescences axillary, dense cymes. Bracteoles forming a cup just below flower. Calyx tube adnate to ovary, persistent; lobes 5-8. Petals 4, lanceolate. Stamens 8-12; filaments much shorter than anthers or absent; anthers introrse, locules many, dehiscing by an adaxial valve. Ovary inferior, 2-loculed, apically partly surrounded by a disk, free part elongating after anthesis; style 1, sometimes very short; stigmas 4. Fruit brown, ovoid, ovoid-conic, or pyriform. Fertile seed 1 per fruit; germination viviparous; hypocotyl protruding to 78 cm before propagule falls.

Eight or nine species: tropics and subtropics; three species in China.

1 Peduncle shorter than petiole, thick, on leafless stems; flowers 2 per inflorescence; bracteoles united, cup-shaped; petals glabrous.   1 R. apiculata
+ Peduncle usually as long as petiole, slender, in leaf axil; flowers more than 2 per inflorescence; bracteoles united at base; petals pubescent   (2)
2 (1) Style 0.5-1.5 mm; anthers sessile.   2 R. mucronata
+ Style 4-6 mm; anthers on a short but distinct filament.   3 R. stylosa

Lower Taxa


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