1. Family: Arecaceae Bercht. & J.Presl
    1. Genus: Calamus L.
      1. Calamus georgei W.J.Baker

        This species is accepted, and its native range is Peninsula Malaysia.

    General Description
    Slender clustering rattan 5-8 m long. Stems closely clustering by short suckers, to 8 mm diam. without sheaths, to 15 mm with sheaths. Internodes c. 20 cm in length. Leaf sheaths rather densely whitish-grey-green when young and fresh, drying dull brown, densely covered with greyish-white scurfy indumentum, and crowded partial whorls of easily detached dark brown almost blackish spiculae to 2 mm long borne on pale yellowish-green bulbous bases united into delicate ridges; larger non-spiculate spines apparently very rare, usually absent, and chocolate-coloured scales also absent; geniculus present, rather densely armed with partial whorls of spiculae, these c. 0.5-1 mm distant; ocrea 3-5 mm high, sparsely spiculate, tattering with age. Leaf to 1.5 m in all; petiole 12-20 cm long, rounded abaxially, flattened adaxially, with rather sparse scattered groups of spiculae and dense rigid prickles c. 3-4 mm high on all surfaces, those on the lower surface, larger and usually reflexed; grey-white indumentum sparse, usually absent; rachis very sparsely armed adaxially, abaxially with scattered spines, or reflexed grapnel hooks in 3's to 5's, these continuing along the cirrus where c. 1 cm distant; whole cirrus c. 30-55 cm long. Leaflets 4-6 on each side of the rachis in the mature leaf, the lowermost as large as or larger than the rest, alternate throughout the length of the rachis; the largest to 25 x 11 cm, usually smaller and narrower; upper leaflet margins praemorse with rather rounded and distant lobing, rather obtuse or sometimes long-acuminate, whole leaflet markedly plicate with up to 10-12 plications; leaflets dull green above, sparsely white indumentose below or just faintly discolorous, not densely white indumentose, with scattered pale brown pseudo- parenchymatous scales along ribs on the upper surface; transverse veinlets rather obscure. Young leaves flushed pink on emergence, quickly turning dull green. Staminate and pistillate inflorescences superficially similar, sessile, erect, 21-31 x 4-6.5 cm, relatively rather broad; base of inflorescence at point of insertion about 5 mm wide and 3 mm through. Prophyll pale pinky-green on first emergence, then drying pale cinnamon-brown, when young with very sparse caducous white indumentum, chocolate-coloured scales absent, slightly toothed on margins below, a few scattered spiculae sometimes present on the abaxial surface near the base; beak c. 2 cm long by c. 8 mm wide at the base, rather robust. Axis with up to 8 first-order branches to 8 cm long below, decreasing above; first-order bracts tightly sheathing, to 3 mm long in sheathing portion, with long triangular apiculus to 8 mm long, pale brown. Staminate flowers solitary, borne on an alveolus 0.75 mm diam.; calyx with shallowly triangular lobes c. 0.75 mm long; corolla c. 3 mm long split almost to the base into 3 lobes c. 3 mm x 1.25 mm near the base, tapering to a rather bluntly triangular tip; stamens 6, minutely epipetalous with filaments c. 1.25 mm long, bearing medifixed anthers c. 2 x 0.2 mm (only immature flowers available); pistillode minute. Pistillate flower unknown-but corolla persisting in fruit, with petals triangular c. 4 x 2.5 mm (in Beccari, described but without dimensions). Sterile staminate flower unknown to me (-in Beccari, described as 6 mm long). Fruit at maturity globose, c. 1.5 cm diam., tipped by the stigmatic remains and covered in 12 vertical rows of dark chestnut-brown scales with darker marginal lines; seed rounded, c. 1 cm diam., slightly depressed laterally, covered with a thin sarcotesta; endosperm with dark brown ruminations penetrating to 1.5 mm deep; embryo basal. Eophyll not known
    Very local, endemic to the Malay Peninsula, known only from a few collections. In lowland Pahang found in periodically inundated Peat Swamp Forest.


    Calamus georgei W.J.Baker appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Saw Leng Guan [FRI44435], Indonesia Ceratolobus kingianus K000208229

    First published in Phytotaxa 197(2): 150 (2015)


    Herbarium Catalogue Specimens
    'The Herbarium Catalogue, Royal Botanic Gardens, Kew. Published on the Internet http://www.kew.org/herbcat [accessed on Day Month Year]'. Please enter the date on which you consulted the system.

    Kew Backbone Distributions
    The International Plant Names Index and World Checklist of Selected Plant Families 2019. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
    © Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

    Kew Names and Taxonomic Backbone
    The International Plant Names Index and World Checklist of Selected Plant Families 2019. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
    © Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

    Palmweb - Palms of the World Online
    Palmweb 2011. Palmweb: Palms of the World Online. Published on the internet http://www.palmweb.org. Accessed on 21/04/2013
    Content licensed under Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License http://creativecommons.org/licenses/by-nc-sa/3.0