Calamus mesilauensis J.Dransf., Kew Bull. 36: 797 (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
Only known from lower montane forest on Kinabalu; endemic. (J. Dransfield, The Rattans of Sabah. Sabah Forest Records 13.. 1984)A

Discussion

  • The presence of a vestigial flagellum as well as a cirrus indicates that this species belongs to the group of species related to C. pogonacanthus. The highly tattered inflorescence bracts distinguish it from C. pogonacanthus and the ± unarmed leaflets differentiate it from C. hepbumii. A sterile specimen from Bt. Si lam (JD 5841) may possibly belong to C. mesilauensis. (J. Dransfield, The Rattans of Sabah. Sabah Forest Records 13.. 1984)A

Etymology

  • From the type locality (J. Dransfield, The Rattans of Sabah. Sabah Forest Records 13.. 1984)A

Uses

  • None known but of generally good appearance. (J. Dransfield, The Rattans of Sabah. Sabah Forest Records 13.. 1984)A

Description

  • Slender clustering rattan climbing to c 10 m; stems without sheaths c 8 mm diam., with to 15 mm diam.; internodes to 20 cm. Sheaths pale green with scattered brown scales and armed with scattered large triangular dark brown spines to 10 x 5 mm with swollen yellowish bases and black hairy margins, and much smaller spines to 3 mm scattered in between or in short groups. Knee conspicuous. Ocrea short, fringed with stiff blackish hairs. Vestigial flagellum present to 5 cm. Leaf to 1.25 m including cirrus to 70 cm and very short petiole to 5 cm; cirrus armed with scattered not grouped spines; leaflets c 10 on each side of the rachis, irregularly arranged in four groups of 2 or 3; longest leaflets to 40 x 3.5 cm, plicate, unarmed except for a few black bristles at the tip. Male and female inflorescences superficially similar, to 50 cm, with a short peduncle to 11 cm; main bracts to 15 cm, dull dirty brown covered in brown scales and scattered spines, deeply split and tattering giving the whole inflorescence a dead appearance; male and female rachillae to c 4 cm. Ripe fruit large, wider than high, to 18 x 23 mm, tipped with a cylindrical beak to 1.5 x 1.5 mm and covered in 24 - 26 vertical rows of deep reddish brown scales; seed ± depressed globose to 12 x 17 mm; endosperm deeply ruminate. Seedling leaf unknown. (Fig. 54) (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