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FOC | Family List | FOC Vol. 11 | Polygalaceae

2. Securidaca Linnaeus, Syst. Nat., ed. 10. 2: 1151, 1155. 1759.

蝉翼藤属 chan yi teng shu

Shrubs scandent. Leaves simple, alternate; nodal glands present, veinlets reticulate. Inflorescences racemose or paniculate, terminal or axillary. Flowers zygomorphic, small, with bracts. Sepals 5, caducous, unequal; outer 3 small; inner 2 petaloid, large. Petals 3, lateral petals and keel connate or free, keel helmet-shaped, with apical appendage. Stamens 8; filaments united in lower part, forming trough-shaped sheath open on upper side and adnate to petals; anthers 2-celled, ovoid, dehiscent by oblique pores. Disk reniform. Ovary 1-loculed; ovule 1, anatropous, pendulous; style falcate, curved; stigma short, lobed or not. Fruit usually a samara, with 1 seed; wing oblong or rhombic-oblong, leathery, veins numerous. Seed subglobose, without endosperm, without strophiole; seed coat membranous.

About 80 species: primarily in tropical America, a small number of species distributed in tropical regions of Africa and Asia; two species (one endemic) in China.

1 Inflorescences shorter than 12 cm, few flowered; fruiting body 12-16 mm in diam., winged and with winged appendage.   1 S. yaoshanensis
+ Inflorescences longer than 12 cm, more densely flowered; fruiting body 7-15 mm in diam., winged but without winged appendage.   2 S. inappendiculata

Lower Taxa


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