Arecaceae
Areca

Areca klingkangensis J.Dransf.

First published in Kew Bull. 39: 15 (1984)
This species is accepted
The native range of this species is Borneo (Sarawak). It is a shrub and grows primarily in the wet tropical biome.

Descriptions

Extinction risk predictions for the world's flowering plants to support their conservation (2024). Bachman, S.P., Brown, M.J.M., Leão, T.C.C., Lughadha, E.N., Walker, B.E. https://nph.onlinelibrary.wiley.com/doi/full/10.1111/nph.19592

Conservation
Predicted extinction risk: threatened. Confidence: confident
[AERP]

Distribution
Borneo, Sarawak, 1st Division, known only from the type collection.
General Description
Erect, solitary, undergrowth palmlet. Stem to 2 m tall, c. 7-10 mm diam.; internodes green, 2.5-6 cm long, bearing scattered dull brown scales; nodal scars c. 3 mm wide. Crownshaft well-defined, pale green drying dull brown- ish, c. 25 x 1.5 cm, only slightly swollen; leafsheaths neatly abscissing, c. 10 cm long, longitudinally striate, bearing scattered dark brown scales; ligule c. 3 mm long, soon tattering and becoming lost. Leaf pinnate, excluding sheath to c. 55 cm, including petiole to 12 x 0.3 cm; leaflets 3-6 on each side of the rachis, distant, stiff, very coriaceous, narrow, 1-3-ribbed, concolorous, drying mid-brown, 22-40 x 0.7-1.7 cm, the longest near the base, the shor- test at the apex, acuminate except for the apical pair where tip minutely lobed; minute brown scales present on both surfaces, more abundant abaxially. Inflorescence infrafoliar, branching to 1 order, short, not exceeding c. 8 cm long, usually shorter; prophyll winged, c. 8 x 2 cm or less, bearing scattered scales; peduncle very short, c. 15 mm long, 5 mm wide just above the winged base; rachillae divergent, usually 3 only, to c. 6 cm long, c. 4 mm diam. at the base, tapering to the tip, bright reddish tinged, bearing abun- dant persistent low blackish scales, and sparse, caducous, chaffy hairs; triads rarely more than 2-3 at the base of each rachilla, the rachillae otherwise bearing spirally arranged paired or solitary staminate flowers. Staminate flower irregularly angled, markedly stipitate, especially those of the triads; stipitate base of calyx 0.5-2.5 x 1 mm, angled, glabrous, calyx lobes low c. 0.7 x 1 mm triangular, the margins smooth; petals valvate, glabrous broadly triangular, c. 2.5-3.5 X 1-1.5 mm; stamens 9, slightly irregular, borne on very short or obsolete filaments, anthers 1.8-2 x 0.5-0.6 mm, latrorse; pistillode lacking. Pistillate flower sessile; sepals 3, free c. 5.5 x 3.5 mm, imbricate, cucullate, sparsely hairy along the strong keel, minutely ciliate along margins; petals 3, imbricate, ovate, c. 4.5 x 5 mm, ciliate; staminodes 6, minute; ovary ± conical in bud, c. 2.5 mm diam. at base, tipped with 3 fleshy, angled stigmas. Young fruit greenish tinged; mature fruit known only in mummified condition, fusiform, 26 x 5 mm.
Biology
I discovered this species growing in very wet mossy forest developed on an eroded sandstone block summit at c. 700 m altitude; for an account of its discovery see Dransfield (1982).
Diagnostic
inter species maiores sectionis Microarecae propter florem staminatum stipitatum A. abdulrahmanii et A. ander- sonii affinis sed staminibus 9 vice c. 16 vel 6 distincta.
[PW]

Sources

  • Angiosperm Extinction Risk Predictions v1

    • Angiosperm Threat Predictions
    • http://creativecommons.org/licenses/by/4.0

  • 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 Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0

  • Kew Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 International Plant Names Index and World Checklist of Vascular Plants. 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