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15. Ancistrocladaceae

钩枝藤科 gou zhi teng ke

Authors: Yinzheng Wang & Roy E. Gereau

Lianas or scandent shrubs climbing by hooked apices of sympodial branches; juvenile growth erect, shrubby, monopodial; plants externally glabrous. Leaves alternate; juvenile leaves crowded in terminal rosettes; adult leaves distributed along stems and clustered terminally on branches; stipules absent or tiny and caducous; petiole absent, though leaves often appearing pseudopetiolate due to long attenuate base of blade; leaf blade simple, entire, both surfaces with sparsely to moderately distributed small pits, each pit containing a single trichome that secretes a waxy substance. Flowers small, bisexual, in extra-axillary or apparently terminal dichotomously branched panicles with higher order branches sometimes becoming racemiform or spiciform, regular except for often unequal sepals. Bracts tiny, subtending axes and pedicels. Sepals (4 or)5, seated on middle or upper part of ovary, imbricate, equal or unequal, accrescent and winglike in fruit. Petals (4 or)5, distinct or slightly connate at base, imbricate, convolute, and/or intermediate in bud. Stamens 10, in 1 or 2 whorls, equal or 5 somewhat larger than others, or seldom 8 or only 5; filaments equal or unequal in length, somewhat connate at base and adnate to base of petals; anthers basifixed, tetrasporangiate and dithecal, introrse, opening by longitudinal slits. Gynoecium of 3 carpels united to form a compound, 1-loculed ovary; ovary inferior or partially inferior; ovule solitary, basilateral, hemitropous, bitegmic; styles 1 or usually 3, thickened, oblong; stigmas 3. Fruit a nut surrounded by corky hypanthium and crowned by often unequal sepals. Seed with hard, starchy, ruminate endosperm; embryo short, straight.

One genus and 16 or 17 species: tropical Africa, India, Sri Lanka, SE Asia; one species in China.

Ku Tsuechih. 1999. Ancistrocladaceae. In: Ku Tsuechih, ed., Fl. Reipubl. Popularis Sin. 52(1): 270-271.

Lower Taxon


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