Common Name:

General Information

Dioscorea kamoonensis is a perennial climbing plant growing from a tuberous rootstock. The tubers are ovoid or pear-shaped. It produces a number of twining stems up to 250cm long, the stems twining to the left[].
The plant is harvested from the wild for local use as a food and medicine

Known Hazards

Edible species of Dioscorea have opposite leaves whilst poisonous species have alternate leaves[].

Botanical References

,

Range

E. Asia - northern India, Nepal, Bangladesh, southern and eastern China, Myanmar, Thailand, Laos, Vietnam

Habitat

Secondary scrub forests, forest margins and valleys; at elevations from 500 - 2,900 metres[].

Properties

Edibility Rating
Medicinal Rating
Habit	Perennial Climber
Height	2.50 m
Self-fertile	No
Cultivation Status	Wild

Cultivation Details

We have very little information on this species and do not know if it will be hardy in Britain. It is unlikely to succeed in any but the mildest areas. The following notes are based on the general needs of the genus.
Easily grown in a fertile well-drained soil in a sunny position or light shade[]. Prefers a rich light soil[].
Plants produce tubercles (small tubers that are formed in the leaf axils of the stems), and can be propagated by this means[].
A climbing plant that supports itself by twining around the branches of other plants[].
A dioecious species - both male and female forms must be grown if fruit and seed are required.

Edible Uses

Tuber - cooked[, , ]. Plants produce a number of small and globular tubers[].

Medicinal

The roots of most, if not all, members of this genus, contains diosgenin[, ]. This is widely used in modern medicine in order to manufacture progesterone and other steroid drugs. These are used as contraceptives and in the treatment of various disorders of the genitary organs as well as in a host of other diseases such as asthma and arthritis[].

Other Uses

None known

Propagation

Seed - sow early spring to mid spring in a sunny position in a warm greenhouse and only just cover. It germinates in 1 - 3 weeks at 20°c[]. Prick out the seedlings as soon as they are large enough to handle and grow on in a greenhouse for their first year. Plant out in late spring as the plant comes into new growth.
Basal stem cuttings in the summer[].
Division in the dormant season, never when in growth[]. The plant will often produce a number of shoots, the top 5 - 10 cm of the root below each shoot can be potted up to form a new plant whilst the lower part of the root can be eaten[].
Tubercles (baby tubers) are formed in the leaf axils. These are harvested in late summer and early autumn when about the size of a pea and coming away easily from the plant. They should be potted up immediately in individual pots in a greenhouse or cold frame. Plant out in early summer when in active growth[].