Plectocomiopsis triquetra (Becc.) J.Dransf., Bot. J. Linn. Soc. 81: 6 (1980)

Primary tabs

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Distribution

Map uses TDWG level 3 distributions (http://www.nhm.ac.uk/hosted_sites/tdwg/geogrphy.html)
Borneo present (World Checklist of Arecaceae)B
Known from one collection. Elsewhere in Sarawak, Sabah and Kalimantan. Endemic to Borneo. (J. Dransfield, The Rattans of Brunei Darussalam. 1997)A

Discussion

  • Plectocomiopsis triquetra is confined to peat swamp forest and kerapah in the lowlands. For differences between this species and P. mira see under the latter. (J. Dransfield, The Rattans of Brunei Darussalam. 1997)A

Etymology

  • Three-angled (J. Dransfield, The Rattans of Brunei Darussalam. 1997)A

Uses

  • None known. (J. Dransfield, The Rattans of Brunei Darussalam. 1997)A

Description

  • Moderate, clustering high-climbing rattan with stems to 40 m; stem without sheaths distinctly 3-angled, to 8 mm diam., with sheaths to 20 mm diam., internodes to 30 cm long, shorter in exposed stems. Leaf sheath dull to bright green, very sparsely armed with golden yellow horizontal spines to 1 cm arranged in a vertical line below the petiole and along the other 2 angles, also with scattered brown indumentum; knee absent; ocrea conspicuous, usually bright yellowish-brown, up to 2 cm, tightly enclosing the stem, distinctly longer on the side opposite to the petiole, tending to form a triangular limb. Leaf to 1.2 m including the petiole to 15 cm and cirrus to 60 cm, leaflets 5-10 on each side of the rachis, ± regularly arranged, narrow lanceolate, to 30 × 3 cm with very sparse marginal bristles. Inflorescences about 5 produced simultaneously, the male more finely branched than the female, to 35 cm, bearing pendulous branches to 18 cm; flowers in groups of 4-7. Mature fruit as in P. mira; details of scales not available. Seedling leaf not known. (Fig. 81, Pl. 16A, 16B). (J. Dransfield, The Rattans of Brunei Darussalam. 1997)A

Materials Examined

  • BEL: Seria, Badas F.R., Dransfield J. 7282 (J. Dransfield, The Rattans of Brunei Darussalam. 1997)A

Bibliography

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