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

        This species is accepted, and its native range is Papua New Guinea.

    [PW]
    Vernacular
    Not known
    Distribution
    Known from a single collection in Gulf Province of Papua New Guinea
    Biology
    Hill forest on karst limestone above riverside swamp forest, 50 m.
    General Description
    Moderately robust, clustering rattan climbing to 15 m. Stem with sheaths c. 11 mm diam., without sheaths to c. 9 mm diam.; internodes c. 25 cm. Leaf ecirrate to 74 cm long including petiole; sheath pale yellowish green, occasionally with patches of very thin, orange-brown indumentum, spines numerous, 1 – 2.5 × 1 – 1.5 mm, triangular, solitary, some deflexed, very few erect, colour as sheath, but with black tips, sometimes with dark purple-brown scales; knee 20 – 22.5 mm long, 9 – 10 mm wide, colour as sheath, armature as sheath; ocrea 24 – 28.5 × 1.6 cm, inflated, tubular, splitting longitudinally with age, clasping and usually obscuring sheath, papery, tattering to fibres, persistent at first, but eventually disintegrating completely, brown, with numerous needle-like spines 2 – 4 mm long and scattered dark purple-brown scales; flagellum present, c. 150 cm long; petiole c. 20 cm, 5.5 × 2 mm at base, slightly channelled adaxially, rounded abaxially, with scattered dark purple-brown scales, armed as sheath adaxially, with few solitary grapnels abaxially; rachis c. 39 cm, with indumentum as petiole, armed on abaxial surface with solitary and irregularly-grouped grapnel spines; leaflets c. 19 each side of rachis, arranged in three widely-spaced groups of 5 – 8 leaflets, leaflets regularly spaced within each group, but slightly divaricate, upper leaflets of middle group overlapping lower leaflets of upper group, linear, longest leaflet towards base 29.5 × 1.5 cm, mid-leaf leaflets 29 × 1.2 cm, apical leaflets 18 × 0.9 cm, apical leaflet pair not united, margins with bristles 0.5 – 1.5 mm, adaxial surface with bristles 1 – 3 mm on all major veins, abaxial surface with few bristles 1.2 – 2.5 mm on mid-rib only, leaflet with very few scales as petiole, transverse veinlets inconspicuous. Staminate inflorescence not seen. Staminate flowers not seen. Pistillate inflorescence very slender, flagelliform, 1.5 m long including 1.4 m peduncle, lacking flagelliform tip, branched to 2 orders; prophyll 28 × 0.5 cm, tubular, not splitting, with scattered dark purple-brown scales, with minute spines throughout; peduncular bracts 4, similar to prophyll, armed as prophyll, but also with scattered grapnel spines, rachis bracts 6 – 20 × 0.3 – 0.4 cm, tubular, tattering at mouth, with scattered indumentum of matted dark purple-brown scales, with numerous minute spines; primary branches 2, to 16.5 cm long, 4.5 cm apart, rather congested, with up to 13 rachillae, secondary bracts tattering, with armature and indumentum as rachis bracts; rachillae 8.5 – 20 mm × 4 mm, straight, erect; rachilla bracts 3 × 3 mm, distichous, funnel-shaped, tattering with age, with indumentum as rachis bracts; proximal floral bracteole 1.5 × 2.5 mm, distal floral bracteole 1.5 × 1.5 mm. Pistillate flowers 5.3 × 2.1 mm at anthesis; calyx 2.1 mm diam., tubular in basal 3 mm, with 3 lobes to 1.4 × 1.5 mm, with dark purple-brown scales; corolla 3.5 × 1.7 mm, tubular in basal 2.2 mm, with 3 lobes to 1.7 × 1.3 mm, glabrous; staminodes 6, 0.6 mm long, staminodal ring 1.4 mm high; ovary 2 × 1.5 mm, subglobose, style 0.7 mm long, stigmas 1 mm long. Fruit not seen.
    Diagnostic
    C. longipinnae Lauterb. et K.Schum. affinis sed foliolis paucioribus aggregatis vice regularibus, ocrea tubulari vice fissa, spinis ocreae acicularibus et ramis inflorescentiae pistillatae congestis vice laxis differt.
    Conservation
    Data deficient. It is not possible to assess the conservation status of such a poorly known species. Large expanses of primary vegetation remain in Gulf Province and neighbouring areas of Papua New Guinea, but logging companies are active in the region

    Images

    Distribution

    Native to:

    New Guinea

    Calamus bankae W.J.Baker & J.Dransf. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Baker, W.J. [1097], Papua New Guinea K000114152 holotype

    First published in Kew Bull. 57: 860 (2002)

    Accepted by

    • Govaerts, R. (2004). World Checklist of Monocotyledons Database in ACCESS: 1-54382. The Board of Trustees of the Royal Botanic Gardens, Kew.

    Literature

    Palmweb - Palms of the World Online
    • W.J. Baker & J. Dransfield, Calamus longipinna (Arecaceae: Calamoideae) and its relatives in New Guinea. 2002

    Sources

    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.
    Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/

    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