1. Family: Arecaceae Bercht. & J.Presl
    1. Genus: Dypsis Noronha ex Mart.
      1. Dypsis gronophyllum Rakotoarin. & J.Dransf.

        Dypsis gronophyllum is a rare palm found in very small numbers at a few sites in Madagascar, and has leaves which appear as though they have been ‘nibbled’ by animals, hence its Latin epithet ‘ gronophyllum’, which describes the eroded or grooved leaves.

    [KSP]

    Kew Species Profiles

    General Description
    A clustering palm, with leaflets that look as though they have been 'nibbled', Dypsis gronophyllum is known only from the Vondrozo area of south-east Madagascar.

    Dypsis gronophyllum is a rare palm found in very small numbers at a few sites in Madagascar, and has leaves which appear as though they have been ‘nibbled’ by animals, hence its Latin epithet ‘ gronophyllum’, which describes the eroded or grooved leaves.

    Species Profile

    Geography and distribution

    Dypsis gronophyllumis known only from parts of the Vondrozo region in the south-east of Madagascar, where its numbers are extremely low. All the sites at which this palm have been found are within a 10 km² area.

    Only about 40 mature individuals have been seen in the wild, growing in valley bottoms in very humid forest, at approximately 590 m above sea level.

    Description

    Overview:  Dypsis gronophyllum is a clustering palm with 2-4 slender stems of up to 4 m tall and 1-1.5 cm in diameter, each with a well-defined crownshaft (a conspicuous cylinder formed by tubular leaf sheaths at the top of the stem).

    Leaves: The crown of the palm comprises 7-12 leaves, the undersurfaces of which are sparsely to densely covered in red hairs. The leaves are pinnate with 7-9 leaflets irregularly arranged along each side of the central rachis, and are up to 40 cm long. The leaflets are leathery and dark bluish-green, and irregularly praemorse (appearing nibbled or bitten off) at the tips.

    Flowers: The inflorescences are borne between the leaves and are densely hairy in places. Each inflorescence is up to approximately 60 cm long and carries flowers in clusters of three (known as triads), each flower being no more than 2 mm in diameter.

    Threats and conservation

    Known from only a few sites, within an area of only 10 km², in the forests of Vondrozo, the numbers of Dypsis gronophyllum are extremely low. Fewer than 40 mature individuals have been seen and it is considered to be a Critically Endangered species. The habitat in which it is found is subject to human exploitation for wood and other natural resources.

    This species at Kew

    A dried specimen of Dypsis gronophyllu m is held in Kew’s Herbarium, where it is made available to researchers from around the world by appointment. No spirit-preserved material or living collections of the species are held at Kew.

    Distribution
    Madagascar
    Ecology
    Lowland humid evergreen forest on white sands, in valley bottoms in very humid forest.
    Conservation
    Critically Endangered (CR) according to IUCN Red List criteria.
    Hazards

    None known.

    Images

    Distribution

    Found In:

    Madagascar

    Dypsis gronophyllum Rakotoarin. & J.Dransf. appears in other Kew resources:

    Date Identified Reference Herbarium Specimen Type Status
    Jan 1, 2010 Rakotoarinivo, M. [RMJ350], Madagascar K000667599 holotype

    First published in Kew Bull. 65: 285 (2010)

    Accepted in:

    • [1] Govaerts, R.H.A. (2011) World checklist of selected plant families published update . Facilitated by the Trustees of the Royal Botanic Gardens, Kew.

    Literature

    • [2] Rakotoarinivo, M. & Dransfield, J. (2010). New species of Dypsis and Ravenea (Arecaceae) from Madagascar. Kew Bull. 65: 279-303.

    Sources

    International Plant Names Index
    The International Plant Names Index (2016). Published on the Internet http://www.ipni.org
    [A] © Copyright 2016 International Plant Names Index. https://creativecommons.org/licenses/by/3.0

    Kew Species Profiles
    Kew Species Profiles
    [B] http://creativecommons.org/licenses/by-nc-sa/3.0
    [C]

    World Checklist of Selected Plant Families
    World Checklist of Selected Plant Families(2016). Published on the Internet http://apps.kew.org/wcsp/
    [D] See http://kew.org/about-kew/website-information/legal-notices/index.htm You may use data on these Terms and Conditions and on further condition that: The data is not used for commercial purposes; You may copy and retain data solely for scholarly, educational or research purposes; You may not publish our data, except for small extracts provided for illustrative purposes and duly acknowledged; You acknowledge the source of the data by the words "With the permission of the Trustees of the Royal Botanic Gardens, Kew" in a position which is reasonably prominent in view of your use of the data; Any other use of data or any other content from this website may only be made with our prior written agreement. http://creativecommons.org/licenses/by-nc-sa/3.0
    [E] © Copyright 2016 International Plant Names Index and World Checkist of Selected Plant Families. https://creativecommons.org/licenses/by/3.0