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Useful Tropical Plants

Pachyrhizus tuberosus

(Lam.) Spreng.

Fabaceae


Closely related to Pachyrrhizus erosus[
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.
].

+ Synonyms

Dolichos tuberosus Lam.

Common Name: Jicama

Pachyrhizus tuberosus
Growing plant, unearthed to reveal the roots
Photograph by: International Potato Center
Creative Commons License
Pachyrhizus tuberosus Pachyrhizus tuberosus Pachyrhizus tuberosus

General Information

Jicama is a perennial climbing or trailing plant producing annual, twining stems about 5 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.
].

Known Hazards

The leaves, mature seedpods and the seeds contain a poisonous glucoside[
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 leaves, stems, roots, ripe pods, and seeds can be toxic to humans[
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.
].

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

S. America - Peru.

Habitat

Growing into trees and shrubs, often in disturbed areas and usually near the coast, from sea level to 500 metres.

Properties

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

Cultivation Details

Grows well in lowland tropical areas at elevations up to 1,000 metres and a moderate rainfall[
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.
]. Plants grow best in areas where the mean minimum temperature is 25°c and the maximum is 30°c, though it can tolerate 16 - 34°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 prefers a mean annual rainfall in the range 1,500 - 1,900mm, but can tolerate 640 - 4,000mm[
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.
].
Prefers 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[
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.
]. Prefers a pH in the range 5 - 5.5, but can tolerate 4.3 - 7.3[
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 tubers mature in 180 - 240 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.
].
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 root the flowers 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]).
].
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

Root - raw or 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.
]. Thirst quenching and nutritious[
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]).
]. A source of a pure white starch resembling arrowroot, it is used in custards and puddings[
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.
,
61
Title
A Dictionary of Plants Used by Man.
Publication
 
Author
Usher. G.
Publisher
Constable
Year
1974
ISBN
0094579202
Description
Forget the sexist title, this is one of the best books on the subject. Lists a very extensive range of useful plants from around the world with very brief details of the uses. Not for the casual reader.
].The root is 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 be up to 2 metres long and weigh up to 20kg[
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 seed pods - cooked and used like French beans[
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]).
,
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.
,
61
Title
A Dictionary of Plants Used by Man.
Publication
 
Author
Usher. G.
Publisher
Constable
Year
1974
ISBN
0094579202
Description
Forget the sexist title, this is one of the best books on the subject. Lists a very extensive range of useful plants from around the world with very brief details of the uses. Not for the casual reader.
]. The pods must be thoroughly cooked in order to remove the toxic 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.
]. The seedpods should not be eaten since they are covered in irritant hairs[
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.
].

Medicinal

None known

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.
].

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.

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