Ravenea glauca Jum. & H.Perrier

This species is accepted, and its native range is S. Central Madagascar.

[PW]
General Description
Slender palm. TRUNK 0.2-8 m tall, rarely with sheath remnants in the distal part, 7-12 cm diam.; basal boss to 10 cm high, 18 cm across; internodes 2-5 cm, brown-grey; nodal scars 0.7-2 cm light brown; wood hard. LEAVES 14-20 in crown, porrect and spreading, slightly arching; sheath 10-50 x 7-10 cm, white-floccose, with variously-sized remnants of more distal sheath material; petiole 10-50 cm, proxi mally 1.5-2.5 x 0.8-2 cm across, distally 1-1.8 x 0.8-1.4 cm, (but most of this used to have adjacent sheath material: true petiole 3-18 cm), channelled adaxially, convex abaxially, with raised sharp edges, abaxially white-tomentose; rachis 1.1-2 m, in mid-leaf 0.7-2 cm across, abaxially rounded with two blunt wings, adaxially channelled with blunt edges, densely white-tomentose when young; leaflets regular, the leaflets on opposite sides of the rachis at an angle of 90°, stiff in the proximal part, half-pendulous in their more distal part, green or glaucous with waxy covering when fresh, 49-73 on each side of the rachis, the proximal 9.5-59 x 0.1-1.1 cm, median 50-70 x 1.2-2.3 cm (interval 1-2 cm), distal 13.5-42 x 0.3-1.4 cm, ramenta sparse on the abaxial side, on the midrib only, spaced, large, white, main veins 2-4. STAMINATE INFLORESCENCE multiple in (1) 2s-6s, branched to 1-2 orders (in the Isalo populations the rachillae only branched at the very base of the inflorescence, and sometimes ; these branched rachillae not present), erect, 70-110 cm; peduncle 35-64 cm long, proximally 5-7 mm across, distally 3-7 mm across, densely white-puberulous; common prophyll 3.5-13.5 cm and membranous; peduncular bracts 9-24 cm (inserted at c. 3 cm from the base of the peduncle), 22-55 cm (inserted at c. 6 cm), 60-105 cm (inserted at c. 6 cm), 62-107 cm (inserted at c. 12 cm), densely pubescent abaxially, adaxially smooth and glabrous; rachis 21-46 cm long, ± glabrous, with c. 30 unbranched and 10 branched first order branches in Andringitra, 0-1 unbranched and 25-52 branched ones in Isalo, with rachis bracts c. 15 x 0.3 cm; rachillae close, porrect, 2-12 cm long, 1 mm across, zigzag, especially distally, with dense flowers; pedicel 0.2-1.5 mm. STAMINATE FLOWERS with the calyx connate for 0.3-1 mm, free lobes 0.8-1 x 0.8 mm, triangular, acute; petals free, 7.5-9 x 1.5 mm, gradually tapering to acute apex; anthers 2.5-3.2 x 1.3-1.4 mm, filaments 0.6 -0.7 mm, the 3 epipetalous stamens adnate for 0.7 mm; pistillode 1 x 0.4 mm. PISTILLATE INFLORESCENCE solitary, erect in bud, spreading at anthesis, pendulous in fruit, 66-158 cm long, branching to one order; peduncle 45-105 cm, slightly flattened, proximally 6-10 x 4-10 mm across, distally 4-10 mm across, pale brown- or grey-white tomentose, distally glabrescent; prophyll 6-18 cm, membranous; peduncular bracts respectively 13-34 (inserted at 0-3 cm from the base of the peduncle), 27-48 x 2.2-2.6 (inserted at 0-6 cm), 60-103 (inserted at 6-7 cm) and 59-158 x 1.6-2 cm (inserted at 10-14 cm), the distal two with apices at the same level; all bracts grey-puberulous to white floccose-tomentose abaxially, adaxially glabrous, smooth and rich brown when dry; non-tubular peduncular bract 4-9 x 0.3-0.4 cm; rachis 17-40 cm long, proximally white-tomentose or with grey bloom, otherwise glabrous; most proximal rachis bracts 38 x 5 mm; rachillae spreading or porrect, slightly zigzag, 24-35 in number, 4-26 cm long, 1.2-2 mm across, sinuous, with spaced flowers, with slightly bulbous base 3.5-4 x 2 mm, white-waxy; bracteole 2.3 x 1.8 mm; pedicels 0.5-5 mm. PISTILLATE FLOWERS with the calyx connate for 0.8 mm, free lobes triangular, acute, 1-3 x 1.0-2 mm; petals 6.5-8 x 1.2-1.7 mm, ovate, acute; staminodes 1.8 x 0.6 mm; ovary 2.5 x 1.3 mm. FRUIT yellow, 20-22 x 22-23 mm, 1-seeded; stigmatic remains lateral or subbasal. SEED 16-18 x 18-19 mm, dark brown; seedcoat brown, 0.2 mm thick; embryo 4 mm. EOPHYLL pinnate.
Conservation
Vulnerable. We are uncertain about the status of populations in the Andringitra; no plants of this species have been collected there since 1922. Elsewhere this species is only known from the Isalo, where population size is probably a few hundred.
Vernacular
Anivo; Sihara (Bara).
Biology
Dry forest and in ravines and rocky or sandy gullies; altitude 670-1250 (?1800) m.
Distribution
Central-S Madagascar: W side of Andringitra Mts and Isalo.

[PW]
Use
Not eaten, since the heart is bitter.

Native to:

Madagascar

English
Sihara

Ravenea glauca Jum. & H.Perrier appears in other Kew resources:

Date Reference Identified As Barcode Type Status Has image?
Jan 1, 1995 Beentje, H.J. [4588], Madagascar 58840.000 No
Jan 1, 1995 Beentje, H.J. [4589], Madagascar 60502.000 No
Jan 1, 1995 Beentje, H. [4712], Madagascar K000114626 No
Jan 1, 1995 Beentje, H.J. [4711], Madagascar K000114627 No
Jan 1, 1995 Beentje, H.J. [4588], Madagascar K000114628 No
Jan 1, 1995 Beentje, H.J. [4589], Madagascar K000114629 No
Jan 1, 1993 Du Puy, B. [MB450], Madagascar K000114624 No
Oct 28, 1987 Humbert, H. [28705], Madagascar K000114625 No
Beentje, H.J. [4588], Madagascar 58834.000 No
Beentje, H.J. [4711], Madagascar 60461.000 No
Beentje, H. [4712], Madagascar 60602.000 No
Cultivated [1992-3412] K000114462 No
Britt, A. [AB32], Madagascar K000462668 No
Beentje, H.J. [4588], Madagascar 65269.000 No
Britt, A. [AB100], Madagascar K000208454 No

First published in Ann. Mus. Colon. Marseille, sér. 3, 1: 56 (1913)

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

  • 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 Living Collection Database

    Common Names from Royal Botanic Gardens, Kew Living Collection https://www.kew.org/

  • 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