Calamus praetermissus J.Dransf., Kew Bull. 36: 802 (1982)

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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
Local throughout Brunei. Elsewhere in Sabah and E Kalimantan. (J. Dransfield, The Rattans of Brunei Darussalam. 1997)A

Discussion

  • C. praetermissus is characteristic of lowland dipterocarp forest at altitudes up to 500 m. It is easily distinguishes by the italicised characters. (J. Dransfield, The Rattans of Brunei Darussalam. 1997)A

Etymology

  • Overlooked (J. Dransfield, The Rattans of Brunei Darussalam. 1997)A

Uses

  • Not recorded, though the cane appears to be of good quality. (J. Dransfield, The Rattans of Brunei Darussalam. 1997)A

Description

  • Clustering moderate high-climbing rattan with stems to 25 m or more; stem without sheaths to 18 mm (usually less), with sheaths to 35 mm; internodes to 18 cm. Sheaths dark green, armed with abundant brown, pale green-based spines, usually of two types, large scattered spines to 30 × 7 mm and smaller spines to 7 × 3 mm, the smaller frequently arranged in partial whorls or oblique groups (rarely the spines of only one type); pale brown indumentum abundant. Knee conspicuous, armed with small spines. Ocrea inconspicuous, low, membranous. Flagellum to 3 m, heavily armed. Leaf ecirrate, curving, to 1.2 m including petiole 10-20 cm; petiole usually armed with short lateral spines; leaflets 12-20 one each side of the rachis, curving, regularly arranged, rather distant, usually lanceolate, rarely linear; proximal leaflets to 35 × 2 cm, middle leaflets 35-45 × 3-7 cm, apical leaflets to 23 × 2.5 cm; lower leaflet surface bristly along main veins; transverse veinlets conspicuous. Male and female inflorescences superficially similar, flagellate, usually pendulous, to 3 m, bracts tubular, tightly sheathing, scabrid; male rachillae to 5 cm, somewhat zigzag, bearing distichous male flowers; female rachillae 10-14 cm with very sparse female flowers. Ripe fruit ovoid to 12 × 9 mm with a beak to 2.5 mm, and covered in 15 vertical rows of pale brown, darker-margined scales. seed to 9 × 7 × 5 mm, deeply pitted, the endosperm subruminate. Seedling leaf unknown. (J. Dransfield, The Rattans of Brunei Darussalam. 1997)A

Materials Examined

  • TEM: Amo, Stockdale 43; Amo, Wong 1735; Amo, K.Belalong, Dransfield J. 6630; Amo, Kuala Belalong, Stockdale 27. (J. Dransfield, The Rattans of Brunei Darussalam. 1997)A

Bibliography

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