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Useful Tropical Plants

Pachyrhizus erosus

(L.) Urb.

Fabaceae


This species is closely related to Pachyrrhizus tuberosus, and sometimes treated as a subspecies of that species[
300
Title
Vegetables in the Tropics
Publication
 
Author
Tindall. H. D.
Publisher
MacMillan, Oxford.
Year
1983
ISBN
0-333-24268-8
Description
An excellent, in-depth look at the main vegetable crops that can be grown in the Tropics, plus many less well-known plants.
,
352
Title
KemperCentreForHomeGardeningPlantFinder
Publication
 
Author
 
Website
http://www.mobot.org/gardeninghelp/plantfinder/
Publisher
Missouri Botanical Garden
Year
0
ISBN
 
Description
Basic cultivation details, plant uses, habitat etc for several thousand species of plants, mainly from the temperate zone.
].

+ Synonyms

Cacara bulbosa Rumphius ex Du Petit-Thouars

Cacara erosa (L.) Kuntze

Cacara palmatiloba (Moc. & Sessé ex DC.) Kuntze

Dolichos articulatus Lam.

Dolichos bulbosus L.

Dolichos erosus L.

Dolichos palmatilobus Moc. & Sessé ex DC.

Pachyrhizus angulatus Rich. ex DC.

Pachyrhizus articulatus Duchass. ex Walp.

Pachyrhizus bulbosus (L.) Kurz

Pachyrhizus jicamas Blanco

Pachyrhizus palmatilobus (Moc. & Sessé ex DC.) Benth. & Hook.f.

Pachyrhizus panamensis R.T.Clausen

Pachyrhizus strigosus R.T.Clausen

Pachyrhizus vernalis R.T.Clausen

Robynsia lobata M.Martens & Galeotti

Robynsia macrophylla M.Martens & Galeotti

Stizolobium bulbosum (L.) Spreng.

Stizolobium domingense Spreng.

Taeniocarpum articulatum (Lam.) Desv.

Common Name: Yam Bean

Pachyrhizus erosus
Roots
Photograph by: Midori
Creative Commons License
Pachyrhizus erosus Pachyrhizus erosus Pachyrhizus erosus Pachyrhizus erosus Pachyrhizus erosus

General Information

Pachyrhizus erosus is a perennial climbing or trailing plant producing annual, twining stems 2 - 6 metres long from a tuberous rootstock[
418
Title
Ecocrop
Publication
 
Author
 
Website
http://ecocrop.fao.org/ecocrop/srv/en/home
Publisher
 
Year
0
ISBN
 
Description
Basic information on a wide range of useful plants, plus details of environmental needs where available.
].
The plant is often cultivated for its edible root and seedpods in tropical areas[
46
Title
Dictionary of Economic Plants.
Publication
 
Author
Uphof. J. C. Th.
Publisher
Weinheim
Year
1959
ISBN
-
Description
An excellent and very comprehensive guide but it only gives very short descriptions of the uses without any details of how to utilize the plants. Not for the casual reader.
,
300
Title
Vegetables in the Tropics
Publication
 
Author
Tindall. H. D.
Publisher
MacMillan, Oxford.
Year
1983
ISBN
0-333-24268-8
Description
An excellent, in-depth look at the main vegetable crops that can be grown in the Tropics, plus many less well-known plants.
]. It also has a range of local medicinal applications and can be used as a pesticide. It is sometimes grown as a green manure.

Known Hazards

Whilst the roots are edible (and often eaten in quantity) the upper portions of the plant, especially the seeds, mature seedpods and the leaves, contain a poisonous glucoside[
296
Title
Tropical Food Gardens
Publication
 
Author
Norrington. L.
Publisher
Bloomings Books (Melbourne)
Year
2001
ISBN
1-876473-41-x
Description
Excellent little book giving some basic information on a range of plants.
,
300
Title
Vegetables in the Tropics
Publication
 
Author
Tindall. H. D.
Publisher
MacMillan, Oxford.
Year
1983
ISBN
0-333-24268-8
Description
An excellent, in-depth look at the main vegetable crops that can be grown in the Tropics, plus many less well-known plants.
,
418
Title
Ecocrop
Publication
 
Author
 
Website
http://ecocrop.fao.org/ecocrop/srv/en/home
Publisher
 
Year
0
ISBN
 
Description
Basic information on a wide range of useful plants, plus details of environmental needs where available.
]. This glucoside is more toxic to cold-blooded creatures than it is to mammals, and the pounded plant is sometimes dropped in water in order to stupefy fish[
360
Title
Philippine Medicinal Plants
Publication
 
Author
 
Website
http://www.stuartxchange.org/CompleteList.html
Publisher
 
Year
0
ISBN
 
Description
A lovely site, giving brief details on the medicinal uses of several hundred (over 400 at the last count) plants in the Philippines, plus a picture of each plant.
].
The mature seeds also contain a toxic resin[
360
Title
Philippine Medicinal Plants
Publication
 
Author
 
Website
http://www.stuartxchange.org/CompleteList.html
Publisher
 
Year
0
ISBN
 
Description
A lovely site, giving brief details on the medicinal uses of several hundred (over 400 at the last count) plants in the Philippines, plus a picture of each plant.
].

Botanical References

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.

Range

Central America - northwestern Costa Rica to southern Mexico.

Habitat

Edges of deciduous forests and scrub vegetation; at elevations up to 1,750 metres but most commonly from 500- -900 metres.

Properties

Edibility Rating *  *  *  *
Other Uses Rating *  *
HabitPerennial Climber
Height6.00 m
Cultivation StatusCultivated

Cultivation Details

Pachyrhizus erosus is tolerant of a wide range of climatic conditions but grows best in lowland tropical areas at elevations up to 1,000 metres and a moderate rainfall[
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.
,
300
Title
Vegetables in the Tropics
Publication
 
Author
Tindall. H. D.
Publisher
MacMillan, Oxford.
Year
1983
ISBN
0-333-24268-8
Description
An excellent, in-depth look at the main vegetable crops that can be grown in the Tropics, plus many less well-known plants.
]. The plant grows best in areas where the mean minimum temperature is about 20°c and the maximum is 30°c, though it can also succeed where they are 15 - 36°c[
418
Title
Ecocrop
Publication
 
Author
 
Website
http://ecocrop.fao.org/ecocrop/srv/en/home
Publisher
 
Year
0
ISBN
 
Description
Basic information on a wide range of useful plants, plus details of environmental needs where available.
]. It is found in areas with a distinct dry season, where the mean annual rainfall is in the range 1,300 - 1,700mm, but can tolerate 250 - 7,000mm[
418
Title
Ecocrop
Publication
 
Author
 
Website
http://ecocrop.fao.org/ecocrop/srv/en/home
Publisher
 
Year
0
ISBN
 
Description
Basic information on a wide range of useful plants, plus details of environmental needs where available.
].
Grows best in a sunny position[
418
Title
Ecocrop
Publication
 
Author
 
Website
http://ecocrop.fao.org/ecocrop/srv/en/home
Publisher
 
Year
0
ISBN
 
Description
Basic information on a wide range of useful plants, plus details of environmental needs where available.
]. Tolerates a wide range of soils, being found in the wild on deep clays to sandy loams[
300
Title
Vegetables in the Tropics
Publication
 
Author
Tindall. H. D.
Publisher
MacMillan, Oxford.
Year
1983
ISBN
0-333-24268-8
Description
An excellent, in-depth look at the main vegetable crops that can be grown in the Tropics, plus many less well-known plants.
]. Prefers a light, rich, well-drained, sandy 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]).
,
300
Title
Vegetables in the Tropics
Publication
 
Author
Tindall. H. D.
Publisher
MacMillan, Oxford.
Year
1983
ISBN
0-333-24268-8
Description
An excellent, in-depth look at the main vegetable crops that can be grown in the Tropics, plus many less well-known plants.
]. Dislikes water-logged soils[
300
Title
Vegetables in the Tropics
Publication
 
Author
Tindall. H. D.
Publisher
MacMillan, Oxford.
Year
1983
ISBN
0-333-24268-8
Description
An excellent, in-depth look at the main vegetable crops that can be grown in the Tropics, plus many less well-known plants.
]. The plant prefers a pH in the range 6.5 - 8, but can tolerate 4.3 - 8[
418
Title
Ecocrop
Publication
 
Author
 
Website
http://ecocrop.fao.org/ecocrop/srv/en/home
Publisher
 
Year
0
ISBN
 
Description
Basic information on a wide range of useful plants, plus details of environmental needs where available.
].
Immature pods are ready for harvest about 200 - 240 days from sowing[
418
Title
Ecocrop
Publication
 
Author
 
Website
http://ecocrop.fao.org/ecocrop/srv/en/home
Publisher
 
Year
0
ISBN
 
Description
Basic information on a wide range of useful plants, plus details of environmental needs where available.
].
Tubers may be harvested after 150 - 270 days, before they become fibrous[
418
Title
Ecocrop
Publication
 
Author
 
Website
http://ecocrop.fao.org/ecocrop/srv/en/home
Publisher
 
Year
0
ISBN
 
Description
Basic information on a wide range of useful plants, plus details of environmental needs where available.
]. In warmer parts of Mexico with light, rich soil, mature tubers are commonly harvested after only 90 days[
418
Title
Ecocrop
Publication
 
Author
 
Website
http://ecocrop.fao.org/ecocrop/srv/en/home
Publisher
 
Year
0
ISBN
 
Description
Basic information on a wide range of useful plants, plus details of environmental needs where available.
].
Seed crops takes about 300 days to mature[
418
Title
Ecocrop
Publication
 
Author
 
Website
http://ecocrop.fao.org/ecocrop/srv/en/home
Publisher
 
Year
0
ISBN
 
Description
Basic information on a wide range of useful plants, plus details of environmental needs where available.
].
A short-day plant, it requires between 11 - 13 hours of daylight hours per day in order to initiate tuber production[
K
Title
Plants for a Future
Author
Ken Fern
Description
Notes from observations, tasting etc at Plants For A Future and on field trips.
], though vegetative growth is normal even in relatively long days of 14 - 15 hours[
300
Title
Vegetables in the Tropics
Publication
 
Author
Tindall. H. D.
Publisher
MacMillan, Oxford.
Year
1983
ISBN
0-333-24268-8
Description
An excellent, in-depth look at the main vegetable crops that can be grown in the Tropics, plus many less well-known plants.
].
When grown for its edible root the flowers and seedpods should be removed[
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]).
,
459
Title
The Useful Plants of the Island of Guam
Publication
Contributions from the United States National Herbarium Vol 9
Author
Safford W.E.
Website
http://www.biodiversitylibrary.org/
Publisher
Smithsonian Institute; Washington.
Year
1905
ISBN
 
Description
A very comprehensive, if rather dated, guide to the plants of Guam. It can be downloaded from the Internet.
].
There are some named forms[
301
Title
Cornucopia II
Publication
 
Author
Facciola. S.
Publisher
Kampong Publications, California.
Year
1998
ISBN
0-9628087-2-5
Description
The second edition of an excellent guide to the edible uses of plants, though it does not give any details of cultivation etc.
].
This species has a symbiotic relationship with certain soil bacteria, these bacteria form nodules on the roots and fix atmospheric nitrogen. Some of this nitrogen is utilized by the growing plant but some can also be used by other plants growing nearby[
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.
].

Edible Uses

Edible root - raw or cooked[
296
Title
Tropical Food Gardens
Publication
 
Author
Norrington. L.
Publisher
Bloomings Books (Melbourne)
Year
2001
ISBN
1-876473-41-x
Description
Excellent little book giving some basic information on a range of plants.
]. Crisp, sweet and juicy, it tastes somewhat like an apple when raw and a water chestnut when cooked[
296
Title
Tropical Food Gardens
Publication
 
Author
Norrington. L.
Publisher
Bloomings Books (Melbourne)
Year
2001
ISBN
1-876473-41-x
Description
Excellent little book giving some basic information on a range of plants.
,
301
Title
Cornucopia II
Publication
 
Author
Facciola. S.
Publisher
Kampong Publications, California.
Year
1998
ISBN
0-9628087-2-5
Description
The second edition of an excellent guide to the edible uses of plants, though it does not give any details of cultivation etc.
]. The root stays crisp and does not discolour after being cut[
296
Title
Tropical Food Gardens
Publication
 
Author
Norrington. L.
Publisher
Bloomings Books (Melbourne)
Year
2001
ISBN
1-876473-41-x
Description
Excellent little book giving some basic information on a range of plants.
]. It also stays crisp after being cooked, which makes it a popular substitute for water chestnuts in Chinese cooking[
301
Title
Cornucopia II
Publication
 
Author
Facciola. S.
Publisher
Kampong Publications, California.
Year
1998
ISBN
0-9628087-2-5
Description
The second edition of an excellent guide to the edible uses of plants, though it does not give any details of cultivation etc.
]. A starch extracted from the root is used in custards and puddings[
301
Title
Cornucopia II
Publication
 
Author
Facciola. S.
Publisher
Kampong Publications, California.
Year
1998
ISBN
0-9628087-2-5
Description
The second edition of an excellent guide to the edible uses of plants, though it does not give any details of cultivation etc.
].
The plant produces one or more turnip-shaped to elongated tubers up to 30cm in diameter and 25cm long. The root is usually harvested before it matures and becomes fibrous, when the plant has been growing for about 6 months and the tuber weighs about 2 kilos[
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.
]. Mature tubers can reach 2 metres long and weigh up to 20 kilos[
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.
].

Young seedpods - cooked and used as a vegetable[
46
Title
Dictionary of Economic Plants.
Publication
 
Author
Uphof. J. C. Th.
Publisher
Weinheim
Year
1959
ISBN
-
Description
An excellent and very comprehensive guide but it only gives very short descriptions of the uses without any details of how to utilize the plants. Not for the casual reader.
,
300
Title
Vegetables in the Tropics
Publication
 
Author
Tindall. H. D.
Publisher
MacMillan, Oxford.
Year
1983
ISBN
0-333-24268-8
Description
An excellent, in-depth look at the main vegetable crops that can be grown in the Tropics, plus many less well-known plants.
,
418
Title
Ecocrop
Publication
 
Author
 
Website
http://ecocrop.fao.org/ecocrop/srv/en/home
Publisher
 
Year
0
ISBN
 
Description
Basic information on a wide range of useful plants, plus details of environmental needs where available.
]. They must be thoroughly cooked in order to destroy the poisonous principle rotenone[
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.
].

Medicinal

A decoction of the roots is used as a diuretic, and also in the treatment of fevers and haemorrhages[
360
Title
Philippine Medicinal Plants
Publication
 
Author
 
Website
http://www.stuartxchange.org/CompleteList.html
Publisher
 
Year
0
ISBN
 
Description
A lovely site, giving brief details on the medicinal uses of several hundred (over 400 at the last count) plants in the Philippines, plus a picture of each plant.
]

A warmed poultice of the stem pulp is applied to painful areas in the leg[
360
Title
Philippine Medicinal Plants
Publication
 
Author
 
Website
http://www.stuartxchange.org/CompleteList.html
Publisher
 
Year
0
ISBN
 
Description
A lovely site, giving brief details on the medicinal uses of several hundred (over 400 at the last count) plants in the Philippines, plus a picture of each plant.
].

The seeds are laxative. A tincture made from seeds is used in the treatment of herpes[
360
Title
Philippine Medicinal Plants
Publication
 
Author
 
Website
http://www.stuartxchange.org/CompleteList.html
Publisher
 
Year
0
ISBN
 
Description
A lovely site, giving brief details on the medicinal uses of several hundred (over 400 at the last count) plants in the Philippines, plus a picture of each plant.
].

The oil obtained from the seeds is purgative in doses of 40 gms[
360
Title
Philippine Medicinal Plants
Publication
 
Author
 
Website
http://www.stuartxchange.org/CompleteList.html
Publisher
 
Year
0
ISBN
 
Description
A lovely site, giving brief details on the medicinal uses of several hundred (over 400 at the last count) plants in the Philippines, plus a picture of each plant.
].

The seed is known to contain rotenoids, flavonoids and phenylfuranocoumarins which have been shown to have antifungal, antisecretory, antibacterial and spasmolytic activities. A study has shown CNS depressant effect with decreased locomotor activity, muscle relaxation, antianxiety and antiaggressive activity[
360
Title
Philippine Medicinal Plants
Publication
 
Author
 
Website
http://www.stuartxchange.org/CompleteList.html
Publisher
 
Year
0
ISBN
 
Description
A lovely site, giving brief details on the medicinal uses of several hundred (over 400 at the last count) plants in the Philippines, plus a picture of each plant.
].
Another study has shown moderate anti-herpes simplex virus activity[
360
Title
Philippine Medicinal Plants
Publication
 
Author
 
Website
http://www.stuartxchange.org/CompleteList.html
Publisher
 
Year
0
ISBN
 
Description
A lovely site, giving brief details on the medicinal uses of several hundred (over 400 at the last count) plants in the Philippines, plus a picture of each plant.
].

Agroforestry Uses:

The plant can be used as a green manure[
418
Title
Ecocrop
Publication
 
Author
 
Website
http://ecocrop.fao.org/ecocrop/srv/en/home
Publisher
 
Year
0
ISBN
 
Description
Basic information on a wide range of useful plants, plus details of environmental needs where available.
].

Other Uses

The plant contains rotenone, the active ingredient in the insecticide 'derris', and it has the potential to be used as an insecticide[
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.
]. Derris is a relatively safe insecticide in that it does not affect warm-blooded animals and also breaks down into harmless substances with 24 hours of being used. It does, however, kill some beneficial insects and is also toxic to fish and amphibians[
K
Title
Plants for a Future
Author
Ken Fern
Description
Notes from observations, tasting etc at Plants For A Future and on field trips.
].

An extract of the root is used as an ingredient in commercial cosmetic preparations as a skin conditioner[
1243
Title
CosIng
Publication
 
Author
 
Website
http://ec.europa.eu/growth/tools-databases/cosing/
Publisher
 
Year
0
ISBN
 
Description
CosIng is the European Commission database for information on cosmetic substances and ingredients.
]
An extract of the seed is used as an ingredient in commercial cosmetic preparations as a skin conditioner[
1243
Title
CosIng
Publication
 
Author
 
Website
http://ec.europa.eu/growth/tools-databases/cosing/
Publisher
 
Year
0
ISBN
 
Description
CosIng is the European Commission database for information on cosmetic substances and ingredients.
].

The seeds yield around 38% of a colourless, limpid oil[
360
Title
Philippine Medicinal Plants
Publication
 
Author
 
Website
http://www.stuartxchange.org/CompleteList.html
Publisher
 
Year
0
ISBN
 
Description
A lovely site, giving brief details on the medicinal uses of several hundred (over 400 at the last count) plants in the Philippines, plus a picture of each plant.
]. No uses are given.

Propagation

Pre-soak the seed for 12 hours in warm water and then sow in situ[
300
Title
Vegetables in the Tropics
Publication
 
Author
Tindall. H. D.
Publisher
MacMillan, Oxford.
Year
1983
ISBN
0-333-24268-8
Description
An excellent, in-depth look at the main vegetable crops that can be grown in the Tropics, plus many less well-known plants.
].
Division of the root tubers.
Cuttings.
Cite as: Tropical Plants Database, Ken Fern. tropical.theferns.info. 2024-12-10. <tropical.theferns.info/viewtropical.php?id=Pachyrhizus+erosus>

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