If you would like to support this site, please consider Donating.
Useful Tropical Plants

Sapindus oahuensis

Hillebr. ex Radlk.

Sapindaceae

+ Synonyms

Common Name: Oahu Soapberry

Sapindus oahuensis
Tree growing on Hawaii
Photograph by: David Eickhoff
Creative Commons License
Sapindus oahuensis Sapindus oahuensis Sapindus oahuensis Sapindus oahuensis Sapindus oahuensis Sapindus oahuensis

General Information

Oahu soapberry is a tree growing from 6 - 15 metres tall. The bole is usually quite short and about 20cm in diameter[
509
Title
The Indiginous Trees of the Hawaiian Islands
Publication
 
Author
Rock J.F.
Website
http://www.biodiversitylibrary.org
Publisher
 
Year
1913
ISBN
 
Description
A guide to the trees and forests of Hawaii. Rather dated, but a good work. It can be downloaded from the Internet.
].
The tree has minor local medicinal uses.
The tree is classified as 'Vulnerable' in the IUCN List of Threatened Species.

Known Hazards

None known

Botanical References

509
Title
The Indiginous Trees of the Hawaiian Islands
Publication
 
Author
Rock J.F.
Website
http://www.biodiversitylibrary.org
Publisher
 
Year
1913
ISBN
 
Description
A guide to the trees and forests of Hawaii. Rather dated, but a good work. It can be downloaded from the Internet.

Range

Pacific - Hawaii.

Habitat

Various forest types at elevations up to 610 metres[
338
Title
IUCN Red List of Threatened Species
Publication
 
Author
 
Website
http://www.iucnredlist.org/
Publisher
 
Year
0
ISBN
 
Description
A list of plants under threat and facing possible extinction, usually with brief details of the threats and information on habitat.
]. Moist to dry forests[
399
Title
Hawaiian Native Plant Propagation Database
Publication
 
Author
 
Website
http://pdcs.ctahr.hawaii.edu:591/hawnprop/
Publisher
 
Year
0
ISBN
 
Description
Detailed information on the propagation of a wide range of Hawaiian plants.
]. A tree of the lower forest zone[
509
Title
The Indiginous Trees of the Hawaiian Islands
Publication
 
Author
Rock J.F.
Website
http://www.biodiversitylibrary.org
Publisher
 
Year
1913
ISBN
 
Description
A guide to the trees and forests of Hawaii. Rather dated, but a good work. It can be downloaded from the Internet.
].

Properties

Conservation StatusVulnerable
Medicinal Rating *  *
HabitTree
Height10.00 m
Self-fertileYes
Cultivation StatusWild

Cultivation Details


Prefers a position in full sun[
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.
]. Very tolerant of a wide range of well-drained soils, including those that are dry, stony and nutrient deficient[
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

None known

Medicinal

The seeds are cathartic[
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.
]. One dose comprises 6 - 7 seeds[
509
Title
The Indiginous Trees of the Hawaiian Islands
Publication
 
Author
Rock J.F.
Website
http://www.biodiversitylibrary.org
Publisher
 
Year
1913
ISBN
 
Description
A guide to the trees and forests of Hawaii. Rather dated, but a good work. It can be downloaded from the Internet.
].

Other Uses

The whitish wood is of no value[
509
Title
The Indiginous Trees of the Hawaiian Islands
Publication
 
Author
Rock J.F.
Website
http://www.biodiversitylibrary.org
Publisher
 
Year
1913
ISBN
 
Description
A guide to the trees and forests of Hawaii. Rather dated, but a good work. It can be downloaded from the Internet.
].

Propagation

Seed - best sown as soon as it is ripe[
399
Title
Hawaiian Native Plant Propagation Database
Publication
 
Author
 
Website
http://pdcs.ctahr.hawaii.edu:591/hawnprop/
Publisher
 
Year
0
ISBN
 
Description
Detailed information on the propagation of a wide range of Hawaiian plants.
]. There are conflicting reports on the usefulness of scarifying the seed, with some saying it makes no difference to germination rates and times, and others that it speeds up germination. If you scarify, then be careful not to harm the embryo. Soaking the seed for 24 hours in warm water after scarification might also be helpful[
399
Title
Hawaiian Native Plant Propagation Database
Publication
 
Author
 
Website
http://pdcs.ctahr.hawaii.edu:591/hawnprop/
Publisher
 
Year
0
ISBN
 
Description
Detailed information on the propagation of a wide range of Hawaiian plants.
]. Germination of untreated seeds or of seeds which have been scarified takes 1 - 6 months and the germination rate is variable since the seeds tend to rot[
399
Title
Hawaiian Native Plant Propagation Database
Publication
 
Author
 
Website
http://pdcs.ctahr.hawaii.edu:591/hawnprop/
Publisher
 
Year
0
ISBN
 
Description
Detailed information on the propagation of a wide range of Hawaiian plants.
].
The best germination results have been achieved when the seed was scarified with a clippers or a knife and then it was either kept in clean, moist vermiculite for 1 - 2 weeks, or was soaked in a shallow pan of water until the dark outer seed coat became soft (changing the water daily until this happened)[
399
Title
Hawaiian Native Plant Propagation Database
Publication
 
Author
 
Website
http://pdcs.ctahr.hawaii.edu:591/hawnprop/
Publisher
 
Year
0
ISBN
 
Description
Detailed information on the propagation of a wide range of Hawaiian plants.
]. Once the outer coat is soft, it can be removed by hand or with a small knife and then the thin papery brown inner coat should be carefully peeled off. This procedure leaves the cream coloured embryo exposed. Handle the embryo carefully so that the embryonic root is not damaged. The embryo should be planted immediately in sterile potting soil, burying it 10 - 20mm deep. With this method, germination takes place in about a week and the germination rate is almost 100%[
399
Title
Hawaiian Native Plant Propagation Database
Publication
 
Author
 
Website
http://pdcs.ctahr.hawaii.edu:591/hawnprop/
Publisher
 
Year
0
ISBN
 
Description
Detailed information on the propagation of a wide range of Hawaiian plants.
].

Add a Comment:

If you have any useful information about this plant, please leave a comment. Comments have to be approved before they are shown here.