Calamus khasianus Becc., Ann. Roy. Bot. Gard. (Calcutta) 11(1): 431 (1908)

Primary tabs

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Distribution

Map uses TDWG level 3 distributions (http://www.nhm.ac.uk/hosted_sites/tdwg/geogrphy.html)
Assam present (World Checklist of Arecaceae)B
China South-Central present (World Checklist of Arecaceae)B
East Himalaya present (World Checklist of Arecaceae)B
: INDIA (Assam, Meghalaya, West Bengal). Endemic. (S.K. Basu, Rattans (canes) in India. A Monographic Revision. 1992)A

Discussion

  • This species is based on G. Man's collection from Khasia hills of Meghalaya. Beccari in his description also referred to the specimens of J.D. Hooker and Thomson from Churra and Nowgong of Assam and C.B. Clarke's specimens collected from Ladder Valley of Khasia hills and from Turra and Lakkat of Garo hills in Meghalaya. These specimens are not available in the Central National Herbarium (CAL) or any other herbaria in India. (S.K. Basu, Rattans (canes) in India. A Monographic Revision. 1992)A

Biology And Ecology

  • Infrequent in the moist forest of Garo and Khasia hills up to 700 m. It is also reported from the Buxa forest range of Jalpaiguri in West Bengal. (S.K. Basu, Rattans (canes) in India. A Monographic Revision. 1992)A

Description

  • A robust climber; stem cluster forming, with leafsheath 5 cm in diameter near lower part; leaves cirrate; leafsheath with distinct knee, more or less smooth on outer surface; tubular part of the sheath infrequently armed with flattened, subulate spines; rachis semiterete at lower part, armed below with paired or solitary hooks; leaflets numerous, lanceolate, in groups of 2 - 4 leaflets on each side of the rachis with long vacant space in between the groups; each to 50 cm long, to 4 cm broad at middle, 3-5 nerved; nerves mostly smooth on both sides or minutely spinous at margins and on upper nerves. Male inflorescence not seen. Female inflorescence 1.5 - 2 m long; partial inflorescences arching from the axis with distinct cushion at the point of attachment with the axis; rachillae sinuous, 20 cm long; 15-16 female flowers on each side of rachilla. Fruits globose, 3 cm in diameter; fruit-scales in 18 series, deeply channelled at middle; seed globose, centrally pitted; endosperm superficially ruminate; embryo basal; fruiting perianth cylindrical. (S.K. Basu, Rattans (canes) in India. A Monographic Revision. 1992)A

Materials Examined

  • West Bengal : Buxa forest, 1959, D.F.O. s.n. (DD). No specimens seen from Assam and Meghalaya. (S.K. Basu, Rattans (canes) in India. A Monographic Revision. 1992)A

Cultivation

  • Not cultivated. (S.K. Basu, Rattans (canes) in India. A Monographic Revision. 1992)A

Bibliography

    A. S.K. Basu, Rattans (canes) in India. A Monographic Revision. 1992
    B. World Checklist of Arecaceae