Calamus laevigatus var. mucronatus (Becc.) J.Dransf., Bot. J. Linn. Soc. 81: 8 (1980)

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Map uses TDWG level 3 distributions (
Borneo present (World Checklist of Arecaceae)B
Widespread in Temburong District. Elsewhere widespread in Borneo, but never very abundant. Endemic. (Dransfield, J. 1997: The Rattans of Brunei Darussalam)A


  • C. laevigatus var. mucronatus is one of the most slender species of rattan in Brunei; it has a very dark colour when fresh, but dries pale green. It is usually found on ridge tops on rather poor soils at altitudes up to 900 m above sea level. (Dransfield, J. 1997: The Rattans of Brunei Darussalam)A

Common Name

  • Rotan Peladas (Br.), Uwai Padas (Dus.), Wi Anak (Ib.) (Dransfield, J. 1997: The Rattans of Brunei Darussalam)A


  • Bearing an abruptly narrowed tip (Dransfield, J. 1997: The Rattans of Brunei Darussalam)A


  • Uses; an excellent very small diameter cane for binding purposes. (Dransfield, J. 1997: The Rattans of Brunei Darussalam)A


  • Very slender solitary rattan climbing to great heights, often over 60 m in length; stem without sheaths c. 4 mm diam., with sheaths to 8 mm diam.; internodes to 13 cm, frequently less in exposed stems. Sheaths dull dark green with very few triangular spines to 3 mm, often with wart-like bases; knee well developed; ocrea to 3 mm fringed with hairs. Leaf cirrate to 90 cm including the cirrus to 45 cm, often the whole leaf to only 30 cm in exposed stems; petiole absent or very short, c. 1 cm; leaflets c. 8 on each side of the rachis, lanceolate and abruptly narrowed at the tip, irregularly arranged in pairs or singly, the basal 1 or 2 reflexed across the stem, the longest to 13 × 2 cm, dark green (drying pale), ± cucullate, transverse veinlets conspicuous. Inflorescences without terminal flagellum, to 45 cm with c. 8 partial inflorescences in all, in detail very similar to that of the type variety but much smaller. Mature fruit ovoid (? always), c. 15 × 10 mm, with a short beak and covered with 14 vertical rows of straw-coloured scales with darker margins. Seed ovoid c. 12 × 8 mm; endosperm deeply ruminate. Seedling leaf bifid. (Fig. 36). (Dransfield, J. 1997: The Rattans of Brunei Darussalam)A

Materials Examined

  • TEM: Amo, Bt.Belalong, Dransfield J. 7109; Amo, Bt.Belalong, Wong 1360; Amo, Bt.Belalong, Wong 1388; Amo, K.Belalong, Stockdale 13; Amo, K.Belalong, Stockdale 54; Bangar, Bt.Biang, Ashton A 169. (Dransfield, J. 1997: The Rattans of Brunei Darussalam)A


    A. Dransfield, J. 1997: The Rattans of Brunei Darussalam
    B. World Checklist of Arecaceae