1. Family: Arecaceae Bercht. & J.Presl
    1. Genus: Calamus L.
      1. Calamus altiscandens Burret

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

    [PW]
    Biology
    In lowland forest, particularly abundant in gullies between ridges, at c. 100 m above sea level.
    Vernacular
    Not recorded.
    Distribution
    Known only from the Palmer R., in the basin of the Fly R. A sterile collection from the Kikori basin may also belong to this species.
    Conservation
    Data deficient.
    General Description
    Moderately robust rattan climbing to the forest canopy (not known whether solitary or clustering). Stem with sheaths 28 - 35 mm diam., without sheaths to 16 mm diam.; internodes c. 15 cm long. Leaf ecirrate to 1.4 - 1.6 m long including petiole; sheath drying pale greenish brown, with caducous dark brown indument; spines very dense, mostly evenly distributed, occasionally joined basally into short horizontal groups, golden, 5 - 18 x 1 -4 mm, distally very slender, soft and laminar, the base much swollen and rigid, persistent, the rest of the spine frequently breaking off just above the swollen base; knee not very conspicuous, armed as the sheath; ocrea 18 x 4.5 cm, coriaceous, tubular, somewhat bilobed and split opposite the petiole, persistent, very densely armed with smaller and more slender spines than the sheaths, the spines frequently in short horizontal groups; flagellum present, at least 3 m long; petiole to 23 cm long, 12 mm wide, 6 mm thick at the base, adaxially flattened or slightly convex, abaxially rounded, with sparse caducous pale brown indument, and on all surfaces with abundant rigid persistent spines 2 - 6 mm long, with swollen bases; rachis to 140 cm long, armed with solitary or grouped recurved hooks abaxially, glabrous or with sparse pale brown caducous indument; leaflets 17 - 19 on each side of rachis, lanceolate, concolorous, arranged in distant groups of twos or threes or singly, basal leaflets to 44 x 4 cm, longest leaflet in mid-leaf 50 x 3.5 cm, apical leaflets 16 - 18 x 1.2 - 1.5 cm, united for about 1/4 their length, leaflets unarmed apart from very small spines along the margins, transverse veinlets conspicuous. Staminate inflorescence not seen. Staminate flowers not seen. Pistillate inflorescence of unknown length, but probably at least 1 m long, probably lacking a flagelliform tip; peduncle, prophyll and peduncular bracts not seen; rachis bracts to at least 30 x 1.5 cm, the longest near the base, with c. 12 cm exposed, proximally tubular, distally split to form an expanded limb to 10 x 4 cm with a triangular tip, the surface with thin caducous indument; primary branches at least 4, strongly recurved, to 21 cm long, 10 - 15 cm apart, with 13 - 18 rather crowded + erect rachillae, subtending bracts unarmed, striate, with triangular tips and somewhat expanded mouths; rachillae in young fruit 5.5 - 12 x 0.35 cm, drying dark brown; rachilla bracts unarmed, striate, 3 mm long with mouth c. 6 mm wide, with scattered dark scales; proximal floral bracteole cup-shaped, c. 2.5 x 2.5 mm, distal floral bracteole cup-shaped, c. 2 x 2 mm, scar from sterile staminate c. 0.3 mm diam. scar of pistillate flower c. 2 mm diam. Pistillate flowers borne in triads of two pistillate and one sterile staminate flowers, or three pistillate flowers, or quadrads of two pistillate and two sterile staminate flowers, not known in bud or anthesis; calyx in young fruit stage 3 x 2 mm with 3 triangular lobes 1.5 x 1.5 mm; petals c. 2.5 x 1 mm; staminodal ring to 0.7 mm high with 6 triangular lobes. Sterile staminate flowers not seen. Fruit (immature) ovoid, 5 x 4 mm with a beak to 0.5 mm, and covered in 17 vertical rows of pale yellowish channelled scales. Seed not yet developed.

    Distribution

    Native to:

    New Guinea

    Calamus altiscandens Burret appears in other Kew resources:

    First published in J. Arnold Arbor. 20: 196 (1939)

    Accepted by

    • Govaerts, R. & Dransfield, J. (2005). World Checklist of Palms: 1-223. The Board of Trustees of the Royal Botanic Gardens, Kew.
    • Govaerts, R. (1999). World Checklist of Seed Plants 3(1, 2a & 2b): 1-1532. MIM, Deurne.

    Literature

    Palmweb - Palms of the World Online
    • J. Dransfield & W.J. Baker, An Account of the Papuasian Species of Calamus (Arecaceae) with Paired Fruit. 2003

    Sources

    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