Calamus baratangensis Renuka & Vijayak., Rheedea 4: 141 (1994)

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Distribution

Map uses TDWG level 3 distributions (http://www.nhm.ac.uk/hosted_sites/tdwg/geogrphy.html)
Andaman Is.present (World Checklist of Arecaceae)B
In evergreen forests of Andamans (Map. 5) Very common in Baratang island. (C. Renuka, A Manual of the Rattans of Andaman and Nicobar Islands. 1995)A

Discussion

  • The species display morphological variations in the diameter of the stem and in the armature of the sheath. Rogers himself has made a note of such variations on his sheets. We have found that the diameter of the cane uarlesfrom 0.5-1.2 cm In the same clump. The younger sheaths are more spiny than the older ones. (C. Renuka, A Manual of the Rattans of Andaman and Nicobar Islands. 1995)A

Biology And Ecology

  • Flowering November-December. Fruiting April - May. (C. Renuka, A Manual of the Rattans of Andaman and Nicobar Islands. 1995)A

Common Name

  • Malay beth, Razi beth (C. Renuka, A Manual of the Rattans of Andaman and Nicobar Islands. 1995)A

Uses

  • Used in furniture industry and for tying rafts. (C. Renuka, A Manual of the Rattans of Andaman and Nicobar Islands. 1995)A

Description

  • Clustering, medium diameter rattan. Stem 25 m long or more, with sheaths 2 cm in diameter, without sheaths 1.2 cm. Leaf 1 m long, ecirrate; sheath green, spiny or glabrous, spines when present brown or black.flat, short on the younger sheaths, to 2cm long on mature sheath; knee prominent: ocrea slightly developed, petiole 14 cm long, margins armed with small spines; spines 0.3 cm long: rachis with a raw of small spines underneath, spines 0.5 cm long; leaflets 30-56 x 2.5 - 4 cm gradually becoming smaller towards the tip, basal part of the terminal pair united, dark green, linear lanceolate, regular, midvein prominent. Male inflorescence long flagellate, primary sheath tightly sheathing; partial inflorescence to 55 cm long; secondary sheath funnel-shaped; rachilla 7 cm long. Female inflorescence long flagellate, primary sheath tightly sheathing, spiny along the sides; partial inflorescence 55 cm long; secondary sheath tightly sheathing; rachilla 7 cm long, decrease in length distally; involucre cup shaped; fruiting perianth 0.4 cm long. Fruits ovoid, ca. 1.25 x 0.9 cm, scales in 21 vertical rows, green when young, turns gray white on maturation, light violet on ripening, channelled at the middle: endosperm not ruminate. (C. Renuka, A Manual of the Rattans of Andaman and Nicobar Islands. 1995)A

Materials Examined

  • Baratang island, Andamans, 12.4.88, fr., Renu/ca4066 (KFRI); Adajig Range, Baratang island, Andamans, 4.4.1992, fr. Vijayakumaran 6628, (KFRI); Pudumadurai, North Andamans, 30.4.92, fr., Vijayakumaran 6640 (KFRI); Mannarghat, South Andamans, 1.4.1993, male inn., Renuka and Vijayakumaran 7029 (KFRI). Rogers 48, 49 (K. cibachrome). (C. Renuka, A Manual of the Rattans of Andaman and Nicobar Islands. 1995)A

Bibliography

    A. C. Renuka, A Manual of the Rattans of Andaman and Nicobar Islands. 1995
    B. World Checklist of Arecaceae