Difference between revisions of "Arenga westerhoutii"

From Palmpedia - Palm Grower's Guide
Jump to: navigation, search
Line 26: Line 26:
 
A. westerhoutii is smaller than other Arenga species. In Laos three types are known: tao kai, with stems of up to 4 m with small reddish fruits, which cause itching when eaten; tao kouay, the most common, with three to seven inflorescences per tree and a large round (undulating, with a dent at the top) white fruit with small seeds; and tao ngou similar to tao kouay, with one to three inflorescences per tree. This last produces a lot of fruit, which is long, square, and has a flat surface, giving the highest yield. Growth Habit: Solitary, Trunk Type: No Crownshaft, Brown Fibrous, Leaf Type: Pinnate, Leaf Size: Up to 8 m (26 ft) Leaf Color: Dark Green, Silver Underside, Petiole: Unarmed. Editing by edric.
 
A. westerhoutii is smaller than other Arenga species. In Laos three types are known: tao kai, with stems of up to 4 m with small reddish fruits, which cause itching when eaten; tao kouay, the most common, with three to seven inflorescences per tree and a large round (undulating, with a dent at the top) white fruit with small seeds; and tao ngou similar to tao kouay, with one to three inflorescences per tree. This last produces a lot of fruit, which is long, square, and has a flat surface, giving the highest yield. Growth Habit: Solitary, Trunk Type: No Crownshaft, Brown Fibrous, Leaf Type: Pinnate, Leaf Size: Up to 8 m (26 ft) Leaf Color: Dark Green, Silver Underside, Petiole: Unarmed. Editing by edric.
 
==Culture==
 
==Culture==
Light: Full Sun, Partial Shade, Soil: Consistently Moist, Fast Draining, Min. Temp: 2°C (36°F) Tolerances: High Humidity, Germination: 1-3 Months,30°C (86°F).
+
Light: Full Sun, Partial Shade, Soil: Consistently Moist, Fast Draining, Min. Temp: 2°C (36°F) Tolerances: High Humidity, Germination: 1-3 Months,30°C (86°F). The tree does not flower until it is mature. A flowering shoot is produced from each node on the stem, commencing with the node at the top of the plant and working down to the base. Vegetative growth ceases when the first flowering shoot is produced, and the stem dies once flowers have been produced from the basal node. Solitary-stemmed species, such as this one, die after flowering.
 
==Comments and Curiosities==
 
==Comments and Curiosities==
 
Harvesting techniques should avoid stem damage. Often, less is harvested than is possible. Shoot collection kills the plant, and as the regeneration rate is low, this should be regulated to ensure enough mature trees are left. Natural stands along streams are being threatened by agricultural clearance. Protected areas could be promoted around streams, while individual tree ownership rights might help to protect stands.
 
Harvesting techniques should avoid stem damage. Often, less is harvested than is possible. Shoot collection kills the plant, and as the regeneration rate is low, this should be regulated to ensure enough mature trees are left. Natural stands along streams are being threatened by agricultural clearance. Protected areas could be promoted around streams, while individual tree ownership rights might help to protect stands.

Revision as of 16:52, 4 January 2020

Arenga (ah-REN-gah)
westerhoutii (wes-ter-hoot'-ee)
D15bb6dd-7911-4c97-999c-eb399badf7af.jpg
Bukit Lagong, Selangor, Malaysia. Photo by Dr. William J. Baker, Royal Botanic Gardens, Kew/Palmweb.
Scientific Classification
Genus: Arenga (ah-REN-gah)
Species:
westerhoutii (wes-ter-hoot'-ee)
Synonyms
Saguerus westerhoutii
Native Continent
Asia
Asia.gif
Morphology
Habit: Solitary
Leaf type: Pinnate
Height: Up to 12m (40ft)
Culture
Survivability index
Common names
Westerhout's Sugar Palm, Malaysia: langkap, anowe kutare, gtor. Thailand: langkap, rangkap, rangkai.

Habitat and distribution

Arenga westerhoutii is found in Assam, Cambodia, East Himalaya, Laos,
Arenga westerhoutii.jpg
Malaya, Myanmar, and Thailand. In Laos mak tao is mainly found along streams in mountainous, limestone rocky areas, or in humid and cool evergreen forests everywhere in the country. Ranges from Burma and south China to Vietnam, Thailand and Malaysia. Rainforests.

Description

Arenga westerhoutii is a single-stemmed, evergreen palm growing up to 12 metres tall. The unbranched stem can be 40cm in diameter, crowned by a rosette of around 6 - 12 leaves. The plant is harvested from the wild for local use as a food and source of materials. All species in this genus have either recognized or potential ornamental value.

A. westerhoutii is smaller than other Arenga species. In Laos three types are known: tao kai, with stems of up to 4 m with small reddish fruits, which cause itching when eaten; tao kouay, the most common, with three to seven inflorescences per tree and a large round (undulating, with a dent at the top) white fruit with small seeds; and tao ngou similar to tao kouay, with one to three inflorescences per tree. This last produces a lot of fruit, which is long, square, and has a flat surface, giving the highest yield. Growth Habit: Solitary, Trunk Type: No Crownshaft, Brown Fibrous, Leaf Type: Pinnate, Leaf Size: Up to 8 m (26 ft) Leaf Color: Dark Green, Silver Underside, Petiole: Unarmed. Editing by edric.

Culture

Light: Full Sun, Partial Shade, Soil: Consistently Moist, Fast Draining, Min. Temp: 2°C (36°F) Tolerances: High Humidity, Germination: 1-3 Months,30°C (86°F). The tree does not flower until it is mature. A flowering shoot is produced from each node on the stem, commencing with the node at the top of the plant and working down to the base. Vegetative growth ceases when the first flowering shoot is produced, and the stem dies once flowers have been produced from the basal node. Solitary-stemmed species, such as this one, die after flowering.

Comments and Curiosities

Harvesting techniques should avoid stem damage. Often, less is harvested than is possible. Shoot collection kills the plant, and as the regeneration rate is low, this should be regulated to ensure enough mature trees are left. Natural stands along streams are being threatened by agricultural clearance. Protected areas could be promoted around streams, while individual tree ownership rights might help to protect stands.



External Links

References

Phonetic spelling of Latin names by edric.

Special thanks to Geoff Stein, (Palmbob) for his hundreds of photos, edric.

Special thanks to Palmweb.org, Dr. John Dransfield, Dr. Bill Baker & team, for their volumes of information and photos, edric.

Glossary of Palm Terms; Based on the glossary in Dransfield, J., N.W. Uhl, C.B. Asmussen-Lange, W.J. Baker, M.M. Harley & C.E. Lewis. 2008. Genera Palmarum - Evolution and Classification of the Palms. Royal Botanic Gardens, Kew. All images copyright of the artists and photographers (see images for credits).


Many Special Thanks to Ed Vaile for his long hours of tireless editing and numerous contributions.

Banner1B
Back to Palm Encyclopedia


Retrieved from "https://palmpedia.net/wiki/index.php5?title=Arenga_westerhoutii&oldid=172863"