Korthalsia jala J.Dransf., Kew Bull. 36: 183 (1981)

Primary tabs

http://media.e-taxonomy.eu/palmae/photos/palm_tc_106387_2.jpg

Distribution

Map uses TDWG level 3 distributions (http://www.nhm.ac.uk/hosted_sites/tdwg/geogrphy.html)
Borneopresent (World Checklist of Arecaceae)B
Local in the lowlands. Elsewhere widespread in Sabah, rare in Sarawak; endemic to Borneo. (J. Dransfield, The Rattans of Brunei Darussalam. 1997)A

Discussion

  • It is a wonderful and unmistakable rattan; the strange net-like ocrea may give protection to the stem apex. (J. Dransfield, The Rattans of Brunei Darussalam. 1997)A

Biology And Ecology

  • K. jala occurs in mixed dipterocarp forest at altitudes up to 400 m. (J. Dransfield, The Rattans of Brunei Darussalam. 1997)A

Common Name

  • Wi Danan (Ib.) (J. Dransfield, The Rattans of Brunei Darussalam. 1997)A

Etymology

  • Latinised from the Malay for a casting net (J. Dransfield, The Rattans of Brunei Darussalam. 1997)A

Uses

  • Produces a large rotan merah. (J. Dransfield, The Rattans of Brunei Darussalam. 1997)A

Description

  • Robust clustering and branching rattan climbing high into the forest canopy with stems to 60 m long; stem without sheaths to 4 cm diam., with sheaths to c. 6 cm diam., usually less, internodes to c. 20 cm. Sheath ± unarmed basally, in upper part rather densely armed with brittle flat pale brown spines to 20 × 2 mm and abundant pinkish brown indumentum and chocolate-coloured scales; ocrea very large and conspicuous, expanded, funnel-shaped, net-like, to 30 cm long, enclosing the stem, the mouth c. 15 cm diam., pale brown, spiny in the lower part. Leaf to 2.75 m long including the cirrus to 1 m and petiole to 40 cm; leaflets broadly rhomboid to 33 × 19 cm, c. 7 on each side of the rachis, with rather short stalks, bright green on the upper surface, chalky-white beneath. Inflorescence to 75 cm, highly branched; rachillae to 11 × 0.6 cm, dark brown tomentose. Ripe fruit not known. Seedling leaf not known. (Fig. 5, Pl. 2B). (J. Dransfield, The Rattans of Brunei Darussalam. 1997)A

Materials Examined

  • TEM: Amo, K.Belalong, Dransfield J. 6712. TUT: Lamunin, Ladan Hills F.R., Wong 515; Lamunin, Ladan Hills F.R., Wong 516 (J. Dransfield, The Rattans of Brunei Darussalam. 1997)A

Bibliography

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