Arecaceae
Chrysalidocarpus

Chrysalidocarpus malcomberi (Beentje) Eiserhardt & W.J.Baker

First published in Taxon 71: 1184 (2022)
This species is accepted
The native range of this species is SE. Madagascar. It is a tree and grows primarily in the seasonally dry tropical biome.

Descriptions

Conservation
Vulnerable. Only known from a single small area. Though this species occurs in a protected area (Andohahela is a Reserve Spéciale) the felling for construction purposes seems to continue.
Distribution
Only known from the Andohahela.
Biology
Moist forest; slight or steep mid slopes, occasionally near forest streams; alt. 400-800 m.
Diagnostic
D. piluliferaeet D. mananjarensi similis sed vagina folii glabra forma rachillarum bracteas triadium conspicuas et flores confertim tectarum recedit.
Vernacular
Rahosy, Vakaka (Antanosy).
General Description
Solitary palm. TRUNK 15-25 m, 25-35 cm diam., distally 14-15 cm diam., at the base slightly bulbous with a few aerial roots, internodes 10-28 cm (distally 5-6 cm), slightly stepped, finely fissured and brown, ringed, nodal scars c. 2 cm. LEAVES tristichous, 6-8 per crown, plumose; sheath bright green to yellow-green, waxy, swollen, 1.5-2 m, 17-25 cm diam., closed or open for up to one quarter of its length, glabrous, auricles absent or up to 4 x 10 cm; petiole 20-50 cm, 4-8 cm diam., bright green, glabrous, canaliculate with sharp edges; rachis 3-4 m long, bright green, in mid-leaf 4-5 cm diam., proximally canaliculate, distally keeled; leaflets in groups of 2-8 or only slightly irregular, the group interval 1-13 cm, the leaflets fanned to almost in one plane, drooping in their distal part, 135-188 on each side of the rachis, basal 80-110 (-220) x 0.6-3.2 cm, median 93-135 x 2.8-4.6 cm, distal 10-50 x 1-2 cm, attenuate, main vein 1, bright green, not waxy, glabrous but for the ramenta. INFLORESCENCE infrafoliar, branched to 3-4 orders, arching and with pendulous rachillae in fruit; peduncle green, 20-30 cm long, 6-16 x 3-5 cm diam., glabrous; prophyll 42-73 x 12-20 cm, borne at 8-9 cm above the base of the peduncle, glabrous, splitting abaxially; peduncular bract borne at 15 cm above the base of the peduncle, deciduous, 72-117 x 16 cm, beaked for 8-21 cm, green, glabrous with a waxy bloom; rachis 60-124 cm, green, glabrous, with 18-21 branched and 12-17 unbranched first order branches; rachillae 15-48 cm long, 3.5-8 mm diam., glabrous, triads dense with proud, slightly reflexed bracts. STAMINATE FLOWERS pale green, with sepals 1.8-2.3 x 2.2-2.8 mm; petals 2.3-2.6 x 1.8-1.9 mm; stamens 6, cream, uniseriate, filaments c. 1 mm in bud, anthers c. 1.3 x 0.6 mm, versatile; pistillode c. 1.5 x 0.5 mm. PISTILLATE FLOWERS (in fruit) with sepals 2.6-3.2 x 2.4-2.8 mm; petals 3-3.5 x 3-4.2 mm; staminodes 0.5-1.3 mm, flat; gynoecium not seen. FRUIT pale orange, globose to ellipsoid, 8-10 x 4-7 mm, with hardly fibrous endocarp; SEED c. 5.5 x 4 mm, with homogeneous endosperm.
[PW]

IUCN Red List of Threatened Species https://www.iucnredlist.org/species/38544/2875886

Conservation
EN - endangered
[IUCN]

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]

Uses

Use
The outer wood is used to make planks for walls.
[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.
    • Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/

  • IUCN Categories

    • IUCN Red List of Threatened Species
    • http://creativecommons.org/licenses/by-nc-sa/3.0

  • 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