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FOC | Family List | FOC Vol. 6 | Lardizabalaceae

2. Akebia Decaisne, Arch. Mus. Hist. Nat. 1: 195. 1839.

木通属 mu tong shu

Woody climbers, deciduous or subevergreen. Monoecious. Stems twining. Winter bud outer scales numerous, persistent. Leaves alternate or clustered on short branches; petiole long; leaf blade palmately compound, 3--5(--7)-foliolate; leaflet margin entire, sinuate, or undulate. Inflorescences axillary, racemose, sometimes umbellate; bracts subtending inflorescences, persistent, scaly. Sepals usually 3(--6), purplish red or greenish white, subvalvate, reflexed at anthesis. Petals absent. Male flowers: borne apically on inflorescence. Stamens free; filaments very short; anthers incurved at anthesis. Pistillodes small. Female flowers: 1 or 2 basally on inflorescence, larger than male flowers. Carpels 3--9(--12), free, cylindric. Stigma capitate. Fruit fleshy follicles, dehiscent along abaxial suture. Seeds numerous, in several rows within pulp, slightly compressed; embryo small.

Five species: China, Japan, Korea; four species (two endemic) in China.

1 Leaves 3(--5)-foliolate.   (2)
+ Leaves (3--)5(--7)-foliolate.   (3)
2 (1) Leaflet margin usually sinuate-dentate; sepals of male flowers 2--3 mm   3 A. trifoliata
+ Leaflet margin subentire; sepals of male flowers 1--2 mm   4 A. chingshuiensis
3 (1) Racemes 6--12 cm, 4--8(--11)-flowered; sepals of male flowers 6--8 mm; leaflets papery, abaxially glaucous   1 A. quinata
+ Racemes 12--18 cm, 23--35(--43)-flowered; sepals of male flowers 4--4.5 mm; leaflets subleathery, abaxially pale green   2 A. longeracemosa

Lower Taxa


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