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Distribution

Map uses TDWG level 3 distributions (http://www.nhm.ac.uk/hosted_sites/tdwg/geogrphy.html)
Malayapresent (World Checklist of Arecaceae)B
Thailandpresent (World Checklist of Arecaceae)B
Kelantan, Perak, Pahang, Trengganu, Selangor, Negri Sembilan, Johore, Singapore. Endemic. (J. Dransfield, A Manual of the rattans of the Malay Peninsula. Malayan Forest Recirds 29.. 1979)A

Discussion

  • Calamus luridus is a very variable species, varying in the length of its petiole from petiole almost absent to well-developed, and in the width and number of leaflets varying from short narrow and numerous, to long narrow and numerous, to long broad and few. C. luridus as originally described by Beccari has few broad leaflets and a well-defined petiole; specimens with many narrow leaflets were described as C. laxiflorus and a specimen with very short leaflets and no petiole from G. Blumut was described as C. belumutensis. I have found intermediates between these taxa, intermediate in inflorescence structure as well as vegetative structure so I have included all taxa in one species C. luridus. C. belumutensis may be regarded as an extreme from montane summit forest.
    C. luridus is found in a wide range of habitats from the lowlands near sea-level up to about 1,400 m altitude in lower montane forest. It appears to favour sites, such as ridgetops, with deep mor-humus layers. It may be readily identified by the italicized characters above. (J. Dransfield, A Manual of the rattans of the Malay Peninsula. Malayan Forest Recirds 29.. 1979)A

Uses

Description

  • Variable slender clustering rattan climbing to 15 m tall. Stem without sheaths to 8 mm in diameter with internodes to 25 cm, with sheaths to 2 cm in diameter. All parts turning dark on drying. Leaf sheath bright to dull or dark green armed with rather regular broadly triangular reflexed spines to 1 cm long by 8 mm wide, with broad somewhat bulbous bases, the bases sometimes ± confluent, indumentum lacking in old sheaths. Ocrea poorly developed. Knee conspicuous. Flagellum to 1.5 m long. Leaf ecirrate, to 1.25 m long bearing regular narrow to broad distant or close leaflets, 12 to 50 on each side, leaflets 20 cm long by 1 cm wide to 30 by 2.5 cm wide. Inflorescence to about 75 cm long with up to 5 partial inflorescences to 25 cm long; all bracts rather distantly and regular armed with reflexed spines. Mature fruit rounded or somewhat oblong, to about 1 cm long by 7.5 mm wide, shortly beaked, covered in 15-17 vertical rows of dull yellowish brown scales. Seed about 7 mm long by 5 mm wide, rather deeply sinuous grooved. Endosperm very shallowly ruminate. Seedling leaf unknown. I (J. Dransfield, A Manual of the rattans of the Malay Peninsula. Malayan Forest Recirds 29.. 1979)A

Synonymy

    • =Calamus laxiflorus Becc., Ann. Roy. Bot. Gard. (Calcutta) 11(App.): 13 (1913)
    • =Calamus distans Ridl., Fl. Malay Penins. 5: 56 (1925)
    • =Calamus belumutensis Furtado, Gard. Bull. Singapore 15: 223 (1956)
    no image available

    Distribution

    Map uses TDWG level 3 distributions (http://www.nhm.ac.uk/hosted_sites/tdwg/geogrphy.html)
    Indiapresent (World Checklist of Arecaceae)B

    Biology And Ecology

    Uses

    Description

    • A slender climber; stem without leafsheath smooth, light yellow in colour, 2 -4 cm in diameter near base; internodes smooth, to 20 cm long. Leaves ecirrate; leafsheath with flagellum; rachis slender, bifaced, upper margins of rachis infrequently armed with 2 mm long broad-based hooks; under surface armed with scattered, broad-based 1 mm long spines; leaflets alternate to subopposite; inequidistant, lower leaflets oblanceolate, to 30 cm long, 5 cm broad at widest part, wedge-shaped at base, apiculate at apices, prominently 5-nerved, nerves slightly bristly on upper side, spinulous at margins; middle leaflets elliptic to broadly lanceolate, to 20 cm long, 6 cm broad at middle, narrowly cuneate at base; upper leaflets sometimes 2-3 lobed at distal part; terminal leaflets irregularly connate at base, sometimes one attached slightly above the other. Female inflorescence flagelliform; partial inflorescences twice branched; rachillae scorpioid, to 8 cm long, 16 - 20 in number, each attached about 1 cm above the mouth of the respective basal bracts; secondary bracts funnel shaped; involucrophorum not pedicelliform, with a neuter flower on one side; involucre disc-like. Fruit globose to sub-globose, 1.5 x 1 cm, abruptly beaked with 3- distinct stigmatic projections; fruiting perianth cup-like at base; fruit scales deep yellow, wedge-shaped with lip-like postichous part, distinctly channelled at middle; seed ovoid, 10x8 mm; endosperm ruminate. (S.K. Basu, Rattans (canes) in India. A Monographic Revision. 1992)D

    Materials Examined

    Synonymy

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