Hyophorbe verschaffeltii — Details

Palmiste Marron learn more about names for this taxon

Overview

Brief Summary

Biology

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The palmiste marron is monoecious, bearing both male and female flowers on the same plant (2) (3) (4) (8). The yellow flowers are unisexual (each flower possessing either male or female reproductive organs) and arranged in clusters, around 90 centimetres wide, that emerge from long, upward-pointing, horn-like bracts on the upper part of the trunk (2) (3). The flowers are said to have a sweet, delicate fragrance (6). The fruit of the palmiste marron is a rounded drupe, 2.5 centimetres wide, and is black when ripe (2) (3) (5).
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Comprehensive Description

Description

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The palmiste marron is a solitary palm with a distinctive grey, spindle-shaped trunk that bulges in the middle (2) (3) (4) (5) and has ring-like markings (6). A smooth, waxy, bluish-grey crownshaft, up to 90 centimetres tall and swollen at the base, emerges from the top of the trunk (2) (4). The leaves of the palmiste marron are large, at 1.8 to 3 metres in length, and pinnate, with 30 to 50 pairs of rigid, dark green leaflets which measure around 60 to 80 centimetres in length (2) (3). The leaf stalk is yellow (3).
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Distribution

Range Description

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Fewer than 60 individuals remain in the wild, occurring in Grand Montagne, Anse Quitor and Ravine de la Cascade, St Louis.
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Range

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The palmiste marron is endemic to the island of Rodrigues, in the Indian Ocean, where it occurs in only 17 locations, including Grand Montagne, Anse Quitor and Ravine de la Cascade, St Louis (1) (5) (7) (8).
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Ecology

Habitat

Habitat and Ecology

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Habitat and Ecology
Limestone areas.

Systems
  • Terrestrial
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Habitat

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This palm is reported to occur in scrub forests and savannas, and to grow in limestone areas (1) (2).
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Molecular Biology and Genetics

Molecular Biology

Statistics of barcoding coverage: Hyophorbe verschaffeltii

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Barcode of Life Data Systems (BOLDS) Stats
Public Records: 1
Species: 1
Species With Barcodes: 1

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Conservation

Conservation Status

IUCN Red List Assessment

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Red List Category
CR
Critically Endangered

Red List Criteria
C2a

Version
2.3

Year Assessed
1998
  • Needs updating

Assessor/s
Johnson, D.

Reviewer/s
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Status

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Classified as Critically Endangered (CR) on the IUCN Red List (1).
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Threats

Threats

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Major Threats
There is no evidence of regeneration and grazing pressures are strong. There is also a threat of hybridisation with the introduced H. lagenicaulis. The species is of commercial interest as an ornamental.
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Threats

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Although widely cultivated as an ornamental palm (1) (5) (7), the palmiste marron is the second rarest palm on Rodrigues, with fewer than 60 individuals left in the wild, and little if any natural regeneration occurring on the island (1) (7) (8). The main threats to the species are overgrazing by cows, sheep and goats, as well as invasion by non-native plants, high levels of seed predation by rats, and severe fragmentation of the population (1) (7) (8). With such a tiny population, events such as cyclones can also have catastrophic effects on this palm (8). Although the palmiste marron is being increasingly cultivated on Rodrigues, to be planted as part of a habitat restoration project, there is a threat of hybridisation with the introduced palm Hyophorbe lagenicaulis (1) (7) (8).
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Management

Conservation

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Conservation measures recommended for the palmiste marron and other endemic palms of the Mascarene Islands include fencing and weeding of areas of native forest to protect the remaining wild palms, as well as propagating species and re-introducing them into the wild, and undertaking further biological research (7) (8). It will also be important to involve local communities, with education programmes, incentives from tourism and palm plantations, and stricter laws for cutting down palms (7). The palmiste marron needs to be protected from hybridisation with closely-related palm species, and legislation is needed to ban the introduction of non-native palms to Rodrigues. Palms that have already been introduced will also need to be removed, although this has proved difficult to date because most are being grown in private gardens (7). Without a long-term conservation programme, this unique and Critically Endangered palm is in great danger of becoming extinct in the wild (8).
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Wikipedia

Hyophorbe verschaffeltii

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Hyophorbe verschaffeltii, the Palmiste Marron, or Spindle Palm is a species of flowering plant in the Arecaceae family.

Spindle Palms are elegant looking palms that are prized for landscape palms in the tropical and semi-tropical areas of the world. They are fairly short palms with 8-10 leaves that are held somewhat erect. Spindle palms have a crownshaft that becomes a light gray-green as the palm ages. Horn-like flower spikes emerge from below the crownshaft on mature specimens.

Spindle palms are fairly cold intolerant. They are defoliated at 32°F (0°C) and may be killed at anything below that. If the palm does survive a freeze, the next few emerging leaves are stunted. Spindle palms grow in the USA only in south Florida and in isolated favored microclimates in the Tampa-St. Petersburg-Clearwater area and the Cape Canaveral area of central Florida. They do make good container plants that can be protected from a freeze.

Spindle Palms are endemic to Rodrigues island, Mauritius. It is threatened by habitat loss.[1] There are only fifty or so specimens left in the wild, although its survival as a species is guaranteed due to ubiquitous cultivation in tropical areas of the planet.

References

  1. ^ Johnson, D. 1998. Hyophorbe verschaffeltii. 2006 IUCN Red List of Threatened Species. Downloaded on 20 July 2007.


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