Calamus holttumii

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Calamus (KAL-ah-muhs)
holttumii (holt-TOOM-ee)
Calamus-holttumii---Habit(ii).jpg
Photo-Malaysian Biological Diversity.
Scientific Classification
Genus: Calamus (KAL-ah-muhs)
Species:
holttumii (holt-TOOM-ee)
Synonyms
None set.
Native Continent
Asia
Asia.gif
Morphology
Habit: Solitary
Leaf type: Pinnate
Culture
Survivability index
Common names
rota in peru.

Habitat and Distribution

Malaya. Johore, Trengganu. Endemic.

Photo-Malaysian Biological Diversity.

Description

Solitary rattan climbing to 15 m tall, usually less. Stem without sheaths to 10 mm in diameter, with sheaths to 2 cm; internodes about 15 cm long. All parts dull becoming reddish tinged on drying. Sheaths dull green armed with abundant bulbous-based spines to 1 cm long by 5 mm wide and abundant sinuous rough ridges. Knee conspicuous armed as the leaf sheath. Ocrea to 1 cm high. Flagellum to 2 m long. Leaf ecirrate to 1 m including petiole to 30 cm long; leaflets very variable, from 4 to 15 on each side, very broad (30 cm long by 5 cm wide) or narrow (30 cm long by 1.5 cm wide), with many intermediates, ± unarmed. Inflorescences to 1.5 m long, the male more highly branched than the female, with bracts rather densely spiny and armed with rough ridges. Mature fruit to about 1 cm in diameter, rounded, very shortly beaked covered in 15 vertical rows of green, drying brown scales; seed about 6 mm in diameter. Endosperm deeply ruminate. Seedling leaf unknown. (J. Dransfield, A Manual of the rattans of the Malay Peninsula. Malayan Forest Records 29.. 1979)/Palmweb. Editing by edric.

Calamus holttumii is a variable plant; the type specimen from G. Panti has relatively narrow leaflets, though most of the living population at the same locality has broad leaflets. Yet in every other respect the plants are similar. For differences from C. tanakadatei see under the latter species. C. holttumii is known from three localities - Ulu Endau and G. Panti in Johore, and Bt. Bauk in Trengganu. It grows in all three localities in hill forest on humus rich soil. (J. Dransfield, A Manual of the rattans of the Malay Peninsula. Malayan Forest Records 29.. 1979)/Palmweb.

Culture

Cold Hardiness Zone: 10a

Comments and Curiosities

Etymology: R.E. Holttum - eminent tropical botanist, one-time director of Botanic Gardens Singapore.

Uses: Cane of good quality (5-10 mm) but probably too rare to be of much significance.



External Links

References

Phonetic spelling of Latin names by edric.

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

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

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).

J. Dransfield, A Manual of the rattans of the Malay Peninsula. Malayan Forest Recirds 29.. 1979


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

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