Dioscorea deltoidea
Wall. ex Griseb.
Dioscoreaceae
Dioscorea nepalensis (Jacquem. ex Prain & Burkill) Sweet ex Bernardi
Tamus nepalensis Jacquem. ex Prain & Burkill
Common Name: Yam
General Information
Dioscorea deltoidea is a perennial climbing plant, producing vigorous annual stems from a large underground tuber. The stems scramble over the ground and twine into nearby vegetation[
310- Title
- Plant Resources of Southeast Asia
- Publication
-
- Author
-
- Website
- http://proseanet.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- Lots of information on the uses of the plants of SE Asia.
].
The plant is sometimes used locally as a medicine, hair wash and food, but it is mainly of importance as a source of the medically active compound diosgenin. It is commonly harvested from the wild for this compound and also sometimes cultivated in countries such as Vietnam and Russia.
Known Hazards
Edible species of Dioscorea have opposite leaves whilst poisonous species have alternate leaves[
174- Title
- Atlas of Medicinal Plants.
- Publication
-
- Author
- Kariyone. T.
- Publisher
- Nihon Rinshosha; Osaka
- Year
- 1973
- ISBN
-
- Description
- A good Japanese herbal.
].
Botanical References
266- Title
- Flora of China
- Publication
-
- Author
-
- Website
- http://flora.huh.harvard.edu/china/
- Publisher
- Missouri Botanical Garden Press; St. Louis.
- Year
- 1994
- ISBN
-
- Description
- An excellent, comprehensive resource in 25 volumes. In addition to the botanical information the flora also gives basic information on habitat and some uses. An on-line version is also available.
Range
E. Asia - China, northeast India, Nepal, Nepal, Myanmar, Thailand, Vietnam.
Habitat
Forests and humus-rich soils, 1,700 - 2,800 metres in Kashmir[
145- Title
- Forest Flora of Srinagar.
- Publication
-
- Author
- Singh. Dr. G. and Kachroo. Prof. Dr. P.
- Publisher
- Bishen Singh Mahendra Pal Singh
- Year
- 1976
- ISBN
- -
- Description
- A good flora of the western Himalayas but poorly illustrated. Some information on plant uses.
]. Broad-leaved forests and scrub forests at elevations of 2,000 - 3,100 metres in western China[
266- Title
- Flora of China
- Publication
-
- Author
-
- Website
- http://flora.huh.harvard.edu/china/
- Publisher
- Missouri Botanical Garden Press; St. Louis.
- Year
- 1994
- ISBN
-
- Description
- An excellent, comprehensive resource in 25 volumes. In addition to the botanical information the flora also gives basic information on habitat and some uses. An on-line version is also available.
].
Properties
Edibility Rating | |
Medicinal Rating | |
Other Uses Rating | |
Habit | Perennial Climber |
Height | 3.00 m |
Self-fertile | No |
Cultivation Status | Cultivated, Wild |
Cultivation Details
Easily grown in a fertile well-drained soil in a sunny position or light shade[
200- Title
- The New RHS Dictionary of Gardening. 1992.
- Publication
-
- Author
- Huxley. A.
- Publisher
- MacMillan Press
- Year
- 1992
- ISBN
- 0-333-47494-5
- Description
- Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
]. Prefers a rich light soil[
1- Title
- RHS Dictionary of Plants plus Supplement. 1956
- Publication
-
- Author
- F. Chittendon.
- Publisher
- Oxford University Press
- Year
- 1951
- ISBN
- -
- Description
- Comprehensive listing of species and how to grow them. Somewhat outdated, it has been replaced in 1992 by a new dictionary (see [200]).
].
Plants produce tubercles (small tubers that are formed in the leaf axils of the stems), and can be propagated by this means[
K- Title
- Plants for a Future
- Author
- Ken Fern
- Description
- Notes from observations, tasting etc at Plants For A Future and on field trips.
].
A climbing plant that supports itself by twining around the branches of other plants[
219- Title
- Gardening on Walls
- Publication
-
- Author
- Grey-Wilson. C. & Matthews. V.
- Publisher
- Collins
- Year
- 1983
- ISBN
- 0-00-219220-0
- Description
- A nice little book about plants for growing against walls and a small section on plants that can grow in walls.
].
Dioecious. Both male and female forms must be grown if seed is required.
Edible Uses
Tuber - cooked[
2- Title
- Sturtevant's Edible Plants of the World.
- Publication
-
- Author
- Hedrick. U. P.
- Publisher
- Dover Publications
- Year
- 1972
- ISBN
- 0-486-20459-6
- Description
- Lots of entries, quite a lot of information in most entries and references.
,
177- Title
- Plants for Human Consumption.
- Publication
-
- Author
- Kunkel. G.
- Publisher
- Koeltz Scientific Books
- Year
- 1984
- ISBN
- 3874292169
- Description
- An excellent book for the dedicated. A comprehensive listing of Latin names with a brief list of edible parts.
]. A slightly bitter flavour, it is usually boiled with some wood ash in order to remove the bitterness[
272- Title
- Plants and People of Nepal
- Publication
-
- Author
- Manandhar. N. P.
- Publisher
- Timber Press. Oregon.
- Year
- 2002
- ISBN
- 0-88192-527-6
- Description
- Excellent book, covering over 1,500 species of useful plants from Nepal together with information on the geography and peoples of Nepal. Good descriptions of the plants with terse notes on their uses.
]. Some caution is advised. See notes below on other uses of the root and above on toxicity.
Medicinal
The juice of the root tuber istaken in the evening in the treatment of roundworm[
272- Title
- Plants and People of Nepal
- Publication
-
- Author
- Manandhar. N. P.
- Publisher
- Timber Press. Oregon.
- Year
- 2002
- ISBN
- 0-88192-527-6
- Description
- Excellent book, covering over 1,500 species of useful plants from Nepal together with information on the geography and peoples of Nepal. Good descriptions of the plants with terse notes on their uses.
]. It is also used to alleviate constipation[
272- Title
- Plants and People of Nepal
- Publication
-
- Author
- Manandhar. N. P.
- Publisher
- Timber Press. Oregon.
- Year
- 2002
- ISBN
- 0-88192-527-6
- Description
- Excellent book, covering over 1,500 species of useful plants from Nepal together with information on the geography and peoples of Nepal. Good descriptions of the plants with terse notes on their uses.
].
The roots of most, if not all, members of this genus, contains diosgenin[
222- Title
- A Field Guide to Medicinal Plants. Eastern and Central N. America.
- Publication
-
- Author
- Foster. S. & Duke. J. A.
- Publisher
- Houghton Mifflin Co.
- Year
- 1990
- ISBN
- 0395467225
- Description
- A concise book dealing with almost 500 species. A line drawing of each plant is included plus colour photographs of about 100 species. Very good as a field guide, it only gives brief details about the plants medicinal properties.
,
240- Title
- Glossary of Indian Medicinal Plants (Including the Supplement).
- Publication
-
- Author
- Chopra. R. N., Nayar. S. L. and Chopra. I. C.
- Publisher
- Council of Scientific and Industrial Research, New Delhi.
- Year
- 1986
- ISBN
- -
- Description
- Very terse details of medicinal uses of plants with a wide range of references and details of research into the plants chemistry. Not for the casual reader.
]. 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[
222- Title
- A Field Guide to Medicinal Plants. Eastern and Central N. America.
- Publication
-
- Author
- Foster. S. & Duke. J. A.
- Publisher
- Houghton Mifflin Co.
- Year
- 1990
- ISBN
- 0395467225
- Description
- A concise book dealing with almost 500 species. A line drawing of each plant is included plus colour photographs of about 100 species. Very good as a field guide, it only gives brief details about the plants medicinal properties.
]. The roots of this species contain an average of 4.8% diosgenin[
240- Title
- Glossary of Indian Medicinal Plants (Including the Supplement).
- Publication
-
- Author
- Chopra. R. N., Nayar. S. L. and Chopra. I. C.
- Publisher
- Council of Scientific and Industrial Research, New Delhi.
- Year
- 1986
- ISBN
- -
- Description
- Very terse details of medicinal uses of plants with a wide range of references and details of research into the plants chemistry. Not for the casual reader.
].
Other Uses
A soap is obtained from the tuber[
145- Title
- Forest Flora of Srinagar.
- Publication
-
- Author
- Singh. Dr. G. and Kachroo. Prof. Dr. P.
- Publisher
- Bishen Singh Mahendra Pal Singh
- Year
- 1976
- ISBN
- -
- Description
- A good flora of the western Himalayas but poorly illustrated. Some information on plant uses.
,
310- Title
- Plant Resources of Southeast Asia
- Publication
-
- Author
-
- Website
- http://proseanet.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- Lots of information on the uses of the plants of SE Asia.
]. This soap is due to the presence of poisonous saponins in the root[
240- Title
- Glossary of Indian Medicinal Plants (Including the Supplement).
- Publication
-
- Author
- Chopra. R. N., Nayar. S. L. and Chopra. I. C.
- Publisher
- Council of Scientific and Industrial Research, New Delhi.
- Year
- 1986
- ISBN
- -
- Description
- Very terse details of medicinal uses of plants with a wide range of references and details of research into the plants chemistry. Not for the casual reader.
,
K- Title
- Plants for a Future
- Author
- Ken Fern
- Description
- Notes from observations, tasting etc at Plants For A Future and on field trips.
]. Used for washing shawls and woollen cloth[
287- Title
- Flora of Pakistan
- Publication
-
- Author
-
- Website
- http://www.efloras.org
- Publisher
-
- Year
-
- ISBN
-
- Description
- As of 2006, there is not much information on habitats available, but it is being developed and promises to be an excellent resource.
]. The soap is also used as a body wash to kill lice[
145- Title
- Forest Flora of Srinagar.
- Publication
-
- Author
- Singh. Dr. G. and Kachroo. Prof. Dr. P.
- Publisher
- Bishen Singh Mahendra Pal Singh
- Year
- 1976
- ISBN
- -
- Description
- A good flora of the western Himalayas but poorly illustrated. Some information on plant uses.
,
240- Title
- Glossary of Indian Medicinal Plants (Including the Supplement).
- Publication
-
- Author
- Chopra. R. N., Nayar. S. L. and Chopra. I. C.
- Publisher
- Council of Scientific and Industrial Research, New Delhi.
- Year
- 1986
- ISBN
- -
- Description
- Very terse details of medicinal uses of plants with a wide range of references and details of research into the plants chemistry. Not for the casual reader.
,
310- Title
- Plant Resources of Southeast Asia
- Publication
-
- Author
-
- Website
- http://proseanet.org/
- Publisher
-
- Year
- 0
- ISBN
-
- Description
- Lots of information on the uses of the plants of SE Asia.
].
Propagation
Seed - sow in containersl in a sunny position in a nursery seedbed and only just cover. It germinates in 1 - 3 weeks at 20°c[
175- Title
- Focus on Plants. Volume 5. (formerly 'Growing from seed')
- Publication
-
- Author
- Bird. R. (Editor)
- Publisher
- Thompson and Morgan.
- Year
- 1991
- ISBN
- -
- Description
- Very readable magazine with lots of information on propagation. A good article on Corydalis spp.
]. 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[
37- Title
- The Gardener's Assistant.
- Publication
-
- Author
- Thompson. B.
- Publisher
- Blackie and Son.
- Year
- 1878
- ISBN
- -
- Description
- Excellent general but extensive guide to gardening practices in the 19th century. A very good section on fruits and vegetables with many little known species.
].
Division in the dormant season, never when in growth[
1- Title
- RHS Dictionary of Plants plus Supplement. 1956
- Publication
-
- Author
- F. Chittendon.
- Publisher
- Oxford University Press
- Year
- 1951
- ISBN
- -
- Description
- Comprehensive listing of species and how to grow them. Somewhat outdated, it has been replaced in 1992 by a new dictionary (see [200]).
]. 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 possibly be eaten[
K- Title
- Plants for a Future
- Author
- Ken Fern
- Description
- Notes from observations, tasting etc at Plants For A Future and on field trips.
].
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[
K- Title
- Plants for a Future
- Author
- Ken Fern
- Description
- Notes from observations, tasting etc at Plants For A Future and on field trips.
].
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