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Useful Tropical Plants

Aloe rabaiensis

Rendle

Asphodelaceae

+ Synonyms

Common Name:

Aloe rabaiensis
Cultivated plant
Photograph by: Magnus Manske
Creative Commons License

General Information

Aloe rabaiensis is a succulent, evergreen, erect or sprawling, dense shrub that branches from the base; it can grow up to 2 metres tall. Each stem is topped by a lax rosette of leaves that can each be 30 - 45cm long and 3 - 8cm wide at the base[
299
Title
Protabase - Plant Resources of Tropical Africa.
Publication
 
Author
 
Website
http://www.prota.org
Publisher
 
Year
0
ISBN
 
Description
An excellent on-line database with detailed information on over 3,200 species of useful plants of Africa.
,
500
Title
Flora of Somalia
Publication
 
Author
Thulin M. (Editor)
Publisher
Kew Publishing, London.
Year
1993
ISBN
 
Description
Detailed information on the plants of the region, often adding notes on the plants uses.
].
The exudate is commonly harvested from the wild because it can be concentrated easily into a solid material suitable for trading, called 'bitters'[
299
Title
Protabase - Plant Resources of Tropical Africa.
Publication
 
Author
 
Website
http://www.prota.org
Publisher
 
Year
0
ISBN
 
Description
An excellent on-line database with detailed information on over 3,200 species of useful plants of Africa.
]. The plant is grown as an ornamental[
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.
].
The species has a very large extent of occurrence, and although the measured area of occupancy is small, it is likely to exceed that given the number of additional sight records, there is some decline due to collection for aloe gel and by succulent collectors. The plant is classified as 'Least Concern' in the IUCN Red List of Threatened Species(2013)[
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.
].

Known Hazards

Combined with Acokanthera schimperi, the exudate is part of an arrow poison made by the Giriama people of the coast of Kenya[
299
Title
Protabase - Plant Resources of Tropical Africa.
Publication
 
Author
 
Website
http://www.prota.org
Publisher
 
Year
0
ISBN
 
Description
An excellent on-line database with detailed information on over 3,200 species of useful plants of Africa.
].
The sap of Aloe species contains anthraquinones. These compounds have several beneficial medicinal actions, particularly as a laxative, and many species of Aloe are thus employed in traditional medicine. Whilst safe in small doses and for short periods of time, anthraquinones do have potential problems if used in excess. These include congestion and irritation of the pelvic organs[
299
Title
Protabase - Plant Resources of Tropical Africa.
Publication
 
Author
 
Website
http://www.prota.org
Publisher
 
Year
0
ISBN
 
Description
An excellent on-line database with detailed information on over 3,200 species of useful plants of Africa.
]. Long term use of anthraquinone laxatives may also play a role in development of colorectal cancer as they have genotoxic potential, and tumorigenic potential[
299
Title
Protabase - Plant Resources of Tropical Africa.
Publication
 
Author
 
Website
http://www.prota.org
Publisher
 
Year
0
ISBN
 
Description
An excellent on-line database with detailed information on over 3,200 species of useful plants of Africa.
].

Botanical References

500
Title
Flora of Somalia
Publication
 
Author
Thulin M. (Editor)
Publisher
Kew Publishing, London.
Year
1993
ISBN
 
Description
Detailed information on the plants of the region, often adding notes on the plants uses.

Range

East tropical Africa - southern Somalia, Kenya, northern Tanzania.

Habitat

Coastal areas in dry Acacia-Commiphora bushland on sandy soils[
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.
]. Sandy soil in open bushland, at elevations up to 500 metres[
299
Title
Protabase - Plant Resources of Tropical Africa.
Publication
 
Author
 
Website
http://www.prota.org
Publisher
 
Year
0
ISBN
 
Description
An excellent on-line database with detailed information on over 3,200 species of useful plants of Africa.
].

Properties

Conservation StatusLeast Concern
Medicinal Rating *  *
HabitEvergreen Shrub
Height1.50 m
Cultivation StatusOrnamental, Wild

Cultivation Details



In order to harvest the exudate from Aloe rabaiensis, a hole is dug in the ground and lined with a container. Cut leaves are arranged around the edge of the hole at an angle allowing the exudate to drain into the container[
299
Title
Protabase - Plant Resources of Tropical Africa.
Publication
 
Author
 
Website
http://www.prota.org
Publisher
 
Year
0
ISBN
 
Description
An excellent on-line database with detailed information on over 3,200 species of useful plants of Africa.
].
Aloe species follow the Crassulacean acid metabolism (CAM). CAM plants can fix carbon dioxide at night and photosynthesize with closed stomata during the day, thus minimizing water loss. This, plus their succulent leaves and stems, and the presence of a thick cuticle, makes them well adapted to dry conditions[
299
Title
Protabase - Plant Resources of Tropical Africa.
Publication
 
Author
 
Website
http://www.prota.org
Publisher
 
Year
0
ISBN
 
Description
An excellent on-line database with detailed information on over 3,200 species of useful plants of Africa.
].

Edible Uses

None known

Medicinal

A leaf decoction is taken to cure an enlarged spleen. It causes vomiting and diarrhoea[
299
Title
Protabase - Plant Resources of Tropical Africa.
Publication
 
Author
 
Website
http://www.prota.org
Publisher
 
Year
0
ISBN
 
Description
An excellent on-line database with detailed information on over 3,200 species of useful plants of Africa.
].
The heated and pounded leaves are applied to swellings[
299
Title
Protabase - Plant Resources of Tropical Africa.
Publication
 
Author
 
Website
http://www.prota.org
Publisher
 
Year
0
ISBN
 
Description
An excellent on-line database with detailed information on over 3,200 species of useful plants of Africa.
].

Small portions of the root are taken as a purgative[
299
Title
Protabase - Plant Resources of Tropical Africa.
Publication
 
Author
 
Website
http://www.prota.org
Publisher
 
Year
0
ISBN
 
Description
An excellent on-line database with detailed information on over 3,200 species of useful plants of Africa.
].

The distinctive constituents in Aloe leaves are phenolic compounds, including chromone, anthraquinone or anthrone derivatives. Some of the compounds are found in many species, whereas others occur in only a few[
299
Title
Protabase - Plant Resources of Tropical Africa.
Publication
 
Author
 
Website
http://www.prota.org
Publisher
 
Year
0
ISBN
 
Description
An excellent on-line database with detailed information on over 3,200 species of useful plants of Africa.
].
The widespread anthrone glucoside aloin A (barbaloin) is present in the exudate of Aloe rabaiensis. The exudate also contains aloeresin-D[
299
Title
Protabase - Plant Resources of Tropical Africa.
Publication
 
Author
 
Website
http://www.prota.org
Publisher
 
Year
0
ISBN
 
Description
An excellent on-line database with detailed information on over 3,200 species of useful plants of Africa.
].
Aloin is the active ingredient in the'‘bitters' and has purgative properties[
299
Title
Protabase - Plant Resources of Tropical Africa.
Publication
 
Author
 
Website
http://www.prota.org
Publisher
 
Year
0
ISBN
 
Description
An excellent on-line database with detailed information on over 3,200 species of useful plants of Africa.
].
Other compounds of interest for their medicinal activity in this and other Aloe species are the lectins and the polysaccharides contained in the gel[
299
Title
Protabase - Plant Resources of Tropical Africa.
Publication
 
Author
 
Website
http://www.prota.org
Publisher
 
Year
0
ISBN
 
Description
An excellent on-line database with detailed information on over 3,200 species of useful plants of Africa.
].

Other Uses

None known

Propagation

Seed - we have no specific information on this species - in general Aloes are sown in a sandy, well-drained potting soil in a warm, shady position in standard seed trays. Germination takes about three weeks. Cover the seed with a thin layer of sand (1 - 2mm), keep moist. The seedlings can be planted out in individual bags or containers as soon as they are large enough to handle[
295
Title
PlantZAfrica.com
Publication
 
Author
 
Website
http://www.plantzafrica.com
Publisher
 
Year
0
ISBN
 
Description
An excellent site giving detailed descriptions and uses of many S. African plants.
].
Cuttings.
Cite as: Tropical Plants Database, Ken Fern. tropical.theferns.info. 2021-04-10. <tropical.theferns.info/viewtropical.php?id=Aloe+rabaiensis>

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