Daemonorops atra

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Daemonorops
(deh-mohn-OHR-ohps)
atra (AHT-rah)
Da3051.jpg
Balikpapan, Indonesia. Photo by Dr. John Dransfield, Royal Botanic Gardens, Kew/Palmweb.
Scientific Classification
Genus: Daemonorops
(deh-mohn-OHR-ohps)
Species:
atra (AHT-rah)
Synonyms
None set.
Native Continent
Asia
Asia.gif
Morphology
Habit: Clustering
Leaf type: Pinnate
Culture
Survivability index
Common names
None.

Habitat and Distribution

Daemonorops atra is found in Borneo. Known from a single collection from Ulu Tutong.
Balikpapan, Indonesia. Photo by Dr. John Dransfield, Royal Botanic Gardens, Kew/Palmweb.
Elsewhere in Sarawak and S and E Kalimantan. Endemic to Borneo. (J. Dransfield. 1997)/Palmweb.

Description

Clustering rattan climbing to about 6 m only, often much less; stem without sheaths about 15 mm diam., with to about 30 mm in diam., internodes about 10 cm long. Sheath bright green, armed with partial or rarely complete whorls of slender, flattened or horse-hair-like, reflexed black spines, 5-40 mm long, borne on low collars, spines around sheath mouth mostly erect, to 70 mm long, pale brown hairs abundant between the spines; knee inconspicuous, armed as the sheath. Leaf cirrate, to 2.5 m including the cirrus to 1 m and petiole to 35 cm; petiole armed laterally with rather distant long spines to 25 mm, and very much smaller spines on the upper surface; leaflets 25-30 on each side of the rachis, stiffly held, arranged in distant groups of 3-7, arranged regularly within the groups in one plane, narrow, linear, acuminate, the longest to about 42 × 2 cm, bristly on 3-5 nerves on the lower surface, transverse veinlets crowded, easily visible. Inflorescences much shorter than the leaves, rarely more than 70 cm long; peduncle about 10 cm long, in the female elongating in fruit; prophyll and other primary bracts chestnut brown, papery, covered in pale brown indumentum and sometimes also bearing fine bristles or spines, the bracts soon falling or becoming tattered; partial inflorescences up to about 9; secondary bracts rather conspicuous, becoming tattered; male rachillae crowded, to 2 cm long, bearing strictly distichous crowded flowers; female rachillae up to 7 cm long. Mature fruit rounded, about 20 mm in diam., beaked and covered in 15-17 vertical rows of matt blackish-brown scales. Seed spherical with sweet sarcotesta; endosperm ruminate, embryo basal. Seedling not known. (J. Dransfield. 1997)/Palmweb. Editing by edric.

D. atra is a plant of rather poor soils on ridges in hill dipterocarp forest at altitudes up to about 200 m above sea level. It is related to D. collarifera but differs in the smaller size of all its parts, the more crowded slender leaflets, the less well developed collars on the sheaths, the conspicuous secondary bracts on the inflorescences and the matt black fruit. (J. Dransfield. 1997)/Palmweb.

Culture

Comments and Curiosities

Etymology: Blackish.


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).

Dransfield, J. 1997. The Rattans of Brunei Darussalam. Ministry of Industry and primary Resources, Brunei Darussalam.


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

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