Botryosicyos pentaphyllus (L.) Hochst.
Dioscorea changjiangensis F.W.Xing & Z.X.Li
Dioscorea codonopsidifolia Kamik.
Dioscorea digitata Mill.
Dioscorea globifera R.Knuth
Dioscorea jacquemontii Hook.f.
Dioscorea kleiniana Kunth
Dioscorea spinosa Burm.
Dioscorea triphylla L.
Hamatris triphylla (L.) Salisb.
Ubium quadrifarium J.F.Gmel.
Ubium scandens J.St.-Hil.
Common Name: Buck Yam
Buck yam is a perennial climbing plant producing annual stems from a perennial rootstock. These stems scramble over the ground, or twine into the surrounding vegetation[
The plant is widely cultivated in tropical areas of Asia for its edible root[
]. It is also harvested from the wild because its slender tubers render its cultivation more difficult[
Edible species of Dioscorea have opposite leaves whilst poisonous species have alternate leaves[
Southeastern Asia - Indian subcontinent, China, through southeast Asia to Australia and Pacific Isl.
Scrub forests, forest margins; at elevations of 500 - 1,500 metres in southern China[
|Cultivation Status||Cultivated, Wild
Plants grow best in lowland tropical areas with a temperature around 26 - 34°c; a well-defined dry season of 2 - 5 months; and a total rainfall of 1,300 - 1,700mm evenly distributed throughout the remainder of the year[
For best yields, this species requires a deep, well-drained, sandy loam that is not liable to water-logging[
Daylengths of more than 12 hours are preferred during the early growing season since this encourages vegetative growth; daylengths of less than 12 hours towards the end of the growing season will encourage tuber formation and development[
There are some named varieties[
An extremely widespread and variable species, with at least 16 varieties being recognised[
A dioecious species, both male and female plants need to be grown if seed is required.
Root - cooked[
]. The tubers weigh up to 2kg each[
]. The tubers, which creep along just beneath the soil surface, are sometimes very long (up to 1.3 metres) and thin[
Male inflorescences and young leaves are sometimes eaten[
The juice of the plant is applied to boils[
A decoction of the plant is applied to swellings[
Seed - not normally used to propagate this species.
Cuttings of tubers. Small tubers can be cut into 2 - 4 sections, larger ones into 6 - 8 sections. Each section should have 2 - 3 dormant buds. The cut tuber is often left in the sun for several hours to promote wound healing and reduce the risk of fungal infection[
If you have any useful information about this plant, please leave a comment. Comments have to be approved before they are shown here.