1. Family: Arecaceae Bercht. & J.Presl
    1. Genus: Oncocalamus (G.Mann & H.Wendl.) H.Wendl.
      1. Oncocalamus tuleyi Sunderl.

        This species is accepted, and its native range is SE. Nigeria to W. Cameroon.

    [PW]
    Distribution
    This species is restricted to coastal forest from SE Nigeria to SW Cameroon, north of the Sanaga River and is allopatric with O. mannii.
    Biology
    Oncocalamus tuleyi occurs at the forest edge, adjacent to open areas, and in gap regrowth vegetation in forest. This species is an early coloniser of disturbed land and as such is a characteristic feature of roadside vegetation in logged forest.
    General Description
    Clustered robust palm climbing to 30m, rarely to 50 m. Stems without sheaths 13-22 mm in diameter, with, 25-45 mm; internodes 14-25 cm long, commonly 15-18 cm. Leaf sheath lightly striate, light brown to mid- green, very sparsely and patchily armed with dark brown to glaucous black spines, often concentrated on the ocrea; sheaths often becoming bare with spines sloughing to leave raised, linear blister-like scars; thin white caducous indumentum present on young sheaths, absent on mature sheaths; ocrea saddle-shaped, with 1.5-2 cm. rounded lobe abaxial to the leaf, armed as the leaf sheath, spines concentrated on margin, extending for ± 2.5 cm; knee absent, although conspicuous horizontal rounded swelling visible beneath leaf. Spear leaf dull reddish brown, becoming green. Juvenile stems up to 10 m, with sheaths <2 cm in diameter, leaves strongly bifid, becoming pinnate, with a short (<6 cm) petiole, 30-45 cm long, 10-15 cm broad at the widest point, with 60-100 cm-long cirrus emerging from the centre; elaminate rachis common at base of stem, 1.5-2 m long. Leaves on mature stems sessile, or with a short (<3 cm) flattened, unarmed petiole; rachis unarmed 1.2-2m long, abaxially rounded, adaxially concave, becoming trapezoid then triangular in cross section distally, unarmed; cirrus 0.8-1.5 m long, rarely 2 m, unarmed; leaflets up to 30-50 on each side of the rachis, composed of a single fold, rarely rarely composed of up to 4-folds, linear-lanceolate or ± sigmoid, broadly to narrowly attenuate at base, finely acuminate at apex, 25-45 cm long, 2.2-3.3 cm broad at the widest point, ± pendulous, uni-, bi- or sometimes tri-nerved, armed along the margins with robust spines particularly at base of leaflet, lowermost leaflets smaller than the rest, arching and somewhat pendulous; acanthophylls up to 4 cm long. Inflorescences born in leaf axils ca.3 m, from stem apex, peduncle up to 30 cm long, flattened, ± rectangular in cross section; prophyll up to 15 cm long; peduncular bracts ca.4, 13-15 cm long, grey-brown without, crimson-brown within; rachis up to 1.8m long, pendulous; rachis bracts as the peduncular bracts except increasingly triangular, acute, at apex; rachillae ± rounded or slightly flattened, 35-45 cm long, bracts dull crimson prior to anthesis; prophylls subtending flower cluster 4-6 mm long, somewhat striate. Flower cluster with 1 central pistillate flower subtended by 2 lateral cincinni with 1 pistillate and 3-4 staminate flowers. Flowers at anthesis not known. Fruit at maturity ± globose, 1.9-2.1 cm × 1.6-1.8 cm, with 17-19 rows of vertical scales. Seed smooth, sub-globose, 1.5-1.7 cm. × 1.2-1.5 cm. with linear cleft or rounded depression below; sarcotesta white, very thin (<0.3 mm).
    Conservation
    Near threatened (NT) due to its restricted range and habitat loss, particularly along the Nigeria-Cameroon border.

    Images

    Distribution

    Native to:

    Cameroon, Nigeria

    Oncocalamus tuleyi Sunderl. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Dec 1, 2000 Gartlan [39], Cameroon K000520002
    Dec 1, 2000 Tuley [603], Nigeria K000520003
    Dec 1, 2000 Tuley [603], Nigeria K000520077
    Jan 1, 2000 Thomas, D.W. [9732], Cameroon K000085701
    Jan 1, 2000 Thomas, D.W. [9732], Cameroon K000085702
    Jan 1, 2000 Thomas, D.W. [9732], Cameroon K000085703
    Jan 1, 2000 Harris, D.J. [3769], Cameroon K000085699
    Jan 1, 2000 Harris, D.J. [3769], Cameroon K000085700
    Dransfield, J. [7007], Cameroon K000520039
    Dransfield, J. [JD7646], Cameroon K000025709
    Sunderland, T.C.H. [1705], Cameroon K000520042
    Sunderland, T.C.H. [1706], Cameroon K000520037
    Sunderland, T.C.H. [1716], Cameroon K000520041
    Sunderland, T.C.H. [1718], Cameroon K000520043
    Sunderland, T.C.H. [1731], Cameroon K000520034
    Sunderland, T.C.H. [1733], Cameroon K000520046
    Sunderland, T.C.H. [1739], Cameroon K000520045
    Sunderland, T.C.H. [1743], Cameroon K000520044
    Sunderland, T.C.H. [1761], Cameroon K000520035
    Sunderland, T.C.H. [1746], Cameroon K000520033
    Sunderland, T.C.H. [1756], Cameroon K000520038
    Sunderland, T.C.H. [1939], Cameroon K000520040
    Sunderland, T.C.H. [2056], Cameroon K000520036

    First published in J. Bamboo Rattan 1: 365 (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
    • T.C.H Sunderland, A taxonomic revision of the rattans of Africa (Arecaceae: Calamoideae) in Phytotaxa 51. 2012
    Kew Backbone Distributions
    • Sunderland, T.C.H. (2012). A taxonomic revision of the rattans of Africa (Arecaceae: Calamoideae) Phytotaxa 51: 1-76.

    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.

    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