Calamus congestiflorus J.Dransf., Kew Bull. 36: 785 (1982)

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
With certainty known only from Nabawan; a sterile specimen from Sapa Payau F.R. is probably this species. Endemic. (J. Dransfield, The Rattans of Sabah. Sabah Forest Records 13.. 1984)A

Discussion

  • C. congestiflorus was collected at the side of a swamp in forest transitional between lowland Dipterocarp forest and kerangas; at Sapa Payau, the sterile specimen was found in a similar habitat. Vegetatively like a neat form of C. javensis with broad bullate leaflets, or a small form of C. amplijugus; yet the congested inflorescence is like neither of these two species. (J. Dransfield, The Rattans of Sabah. Sabah Forest Records 13.. 1984)A

Etymology

  • Crowded flowers (J. Dransfield, The Rattans of Sabah. Sabah Forest Records 13.. 1984)A

Uses

  • As for C. javensis. (J. Dransfield, The Rattans of Sabah. Sabah Forest Records 13.. 1984)A

Description

  • Slender clustering rattan with stems climbing to 20 m; stem without sheaths to 6 mm diam., with to 9 mm; internodes to c 11 cm. Leaf sheath green, tinged crimson, with thin brown indumentum and armed with numerous scattered spines to 3 mm. Knee developed but not very conspicuous. Ocrea short, to 4 mm, tattering. Flagellum to 1 m. Leaf ecirrate to 30 cm, with no petiole; leaflets subregular, broad and beautifully bullate when fresh, about 7 on each side of the rachis, the lowermost pair swept back across the stem; terminal leaflet pair joined for up to l/2 their length; mid leaf leaflets the longest, to 12 x 4 cm, inconspicuously 3-nerved; young leaves tinged pink. Inflorescence only female known, not ending in a flagellum, to 60 cm, curved, with 6 partial inflorescences; partial inflorescences shorter than the conspicuous subtending oblong bract, split down one side, and short spiny; rachillae to 40 x 2.5 mm bearing very congested flowers. Fruit (immature) spherical to 6.5 mm diam., with a conspicuous beak to 2x1 mm, and covered in 21 vertical rows of scarcely grooved greenish scales. Seed c 5 mm diam.; endosperm homogeneous. (Fig. 68) (J. Dransfield, The Rattans of Sabah. Sabah Forest Records 13.. 1984)A

Bibliography

    A. J. Dransfield, The Rattans of Sabah. Sabah Forest Records 13.. 1984
    B. World Checklist of Arecaceae