Ravenea nana Beentje

This species is accepted, and its native range is N. & SE. Madagascar.

[PW]
Conservation
?Endangered. Only known from three areas, and not collected in the last thirty years.
Vernacular
Not recorded.
Distribution
E Madagascar, between Marojejy and Andohahela.
General Description
Small palm. TRUNK 3-4 m tall. LEAF sheath 12.9-16 x 1.5 cm, with thin downward-pointing marginal fibres, densely brown-tomentose; petiole 18-67 cm, proximally 0.5-1.6 x 0.4-1 cm, distally 0.7-1.2 x 0.5-0.8 cm, densely pubescent/tomentose on both surfaces, slightly to deeply channelled adaxially, convex abaxially, with sharp edges; rachis (25-) 33-40 cm, in mid-leaf 6-7 mm wide, with dense grey-brown tomentum on both surfaces; leaflets on opposite sides of the rachis at an angle of 90° with each other, 18-29 on each side of the rachis, the proximal 12-26 x 0.1-1.3 cm (interval 0.8-2 cm), median 16-35 x 0.9-2 cm, without visible ramenta or with dense minute ramenta, acuminate, main vein 1, with scales on margins only, distal 7.5-23 x 0.3-1.5 cm. STAMINATE INFLORESCENCE branched to 1 order; peduncle 28 (or more) x 0.4 x 0.25 cm, densely brown-pubescent; prophyll unknown; peduncular bracts c. 10 cm, 18-25 cm, 29-40 (or more) cm, 30-41 cm; rachis bract c. 11 x 2 mm; rachis 9-13 cm, with 25-40 branches, scaly proximally, glabrous distally; rachillae 2-5 cm, 0.5 mm across, straight; pedicel 0.5-1 mm. STAMINATE FLOWERS with the calyx with very short connate part and lobes 0.8-1.1 mm long; petals 4-4.4 x 1.8 mm, connate for 0.3-0.4 mm by the filament callus of the antesepalous stamens; filaments in 2 series, the antesepalous 0.4-0.5 mm, the antepetalous adnate to the petals for 0.8-1.3 mm, free for 0.2-0.3 mm; anthers 1.5-2 x 0.3-0.4 mm; pistillode 0.6-0.9 mm. PISTILLATE INFLORESCENCE 59-92 cm, branched to 1 order; peduncle 35 (or more?) -77 cm, proximally 3-6 mm across, distally 2-3.5 mm across, with dense red-brown scales, glabrescent; prophyll 6-15 cm, tattering; peduncular bracts 10-13 cm, 19-38 cm, 57-82 cm, 44-92 cm, abaxially densely scaly, adaxially glabrous, chestnut brown; non-tubular peduncular bract 4-18 x 0.3-0.5 cm; rachis 6.3-13 cm, scaly, glabrescent; rachillae 14-27 in number, 1-7.5 cm, 1.2-2 mm across, sinuous; pedicel 0.5-1.5 mm, bracteole 1-2 mm. PISTILLATE FLOWERS with the sepals 1-1.5 mm; petals (fibres only) 2.5-?5 x 1.5-1.6 mm. FRUIT 1.3-2.1 x 1.1-1.7 cm, one-seeded, stigmatic remains lateral to subbasal.
Biology
Ericoid bush or ?low forest on rocky sites, gneiss & quartzite; (?400-) 1100-1900 m; the altitude information on the printed label of the type might be wrong; we believe this is a high-altitude species.

[PW]
Use
Not recorded.

Native to:

Madagascar

Ravenea nana Beentje appears in other Kew resources:

Date Reference Identified As Barcode Type Status Has image?
Aug 16, 2006 Hockley, N.J. [NJH52], Madagascar K000209647 No
Aug 16, 2006 Hockley, N.J. [NJH51], Madagascar K000209648 No
Aug 16, 2006 Hockley, N.J. [NJH50], Madagascar K000209646 No
Jun 18, 2003 L. Gautier et al. [3928], Madagascar K000030838 No
Jan 1, 1993 Humbert, H. [23695], Madagascar K000114671 No
Jan 1, 1993 Humbert, H. [23490], Madagascar K000114672 No
Humbert, H. [23695], Madagascar 62005.000 No
Humbert, H. [21947], Madagascar K000114685 isotype Yes

First published in Kew Bull. 49: 665 (1994)

Accepted by

  • Govaerts, R. & Dransfield, J. (2005). World Checklist of Palms: 1-223. The Board of Trustees of the Royal Botanic Gardens, Kew.

Literature

Palmweb - Palms of the World Online

  • J. Dransfield & H. Beentje, The Palms of Madagascar. 1995

  • Herbarium Catalogue Specimens

    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 2022. 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 2022. 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