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Helictosperma malacophylla (Drake) De Block Search in The Plant ListSearch in IPNISearch in Australian Plant Name IndexSearch in NYBG Virtual HerbariumSearch in Muséum national d'Histoire naturelleSearch in Type Specimen Register of the U.S. National HerbariumSearch in Virtual Herbaria AustriaSearch in JSTOR Plant ScienceSearch in SEINetSearch in African Plants Database at Geneva Botanical GardenAfrican Plants, Senckenberg Photo GallerySearch in Flora do Brasil 2020Search in Reflora - Virtual HerbariumSearch in Living Collections Decrease font Increase font Restore font
 

Published In: PhytoKeys 11: 17–22, figs. 2E, F, 6, 8, 9E–H, N. 2018. (21 May 2018) (PhytoKeys) Name publication detail
 

Project Name Data (Last Modified On 8/22/2018)
Acceptance : Accepted
Taxon Profile     (Last Modified On 2/1/2019)
Distribution : Endemic to Madagascar
Lifeform/Habit : Shrub
Vegetation Formation : Forest
Elevation : 0-499 m
Bioclimate : Dry
Regions (Prov. Fianarantsoa) : Ihorombe
Regions (Prov. Mahajanga) : Betsiboka, Boeny, Sofia
Regions (Prov. Toliara) : Atsimo-Andrefana, Menabe
Protected areas and other important sites : Ankarafantsika, Bemaraha, Complexe Mangoky Ihotry, Menabe Antimena, Namoroka, Zombitse - Vohibasia
Rarity : Known from more than 5 localities in Madagascar.
Notes :

This species is characterized by its somewhat slender, apparently at least sometimes deciduous habit with the flowers and leaves clustered at the ends of lateral short-stems borne on sylleptic long-shoots; its triangular aristate stipules; its thin-textured, elliptic-ovate leaves with well developed pilosulous domatia and often a cordate base; its subsessile, fasciculate, several-flowered cymes; its pedicellate, five-merous flowers with well developed somewhat foliaceous calyx lobes; its hypocrateriform white corollas; its exserted stamens and fusiform stigmas that are shortly bilobed at the apex; and its rather small subglobose fruits. It has been collected at least sometimes on tsingy limestone.


Red List Assessment     (Last Modified On 2/1/2019)
Red List threat category : NEAR THREATENED
Literature source :
Criteria : NT
Rationale :

The extent of occurrence (EOO) of Helictosperma malacophylla is estimated to be 273.476 km2, which falls outside any threat category, but its area of occupancy (AOO) is 261 km2, which complies with the Endangered category under the sub-criterion B2. The species occurs in ten locations and is known from more than fifty collections, twelve of which were collected recently (after 1989). The distribution of these recent collections coincides with the distribution of the older specimens (from 1892 till 1975), indicating that the species remains present throughout its original distribution area. Only few specimens were collected from protected areas, notably Ankarafantsika National Park, Tsingy de Namoroka Strict Nature Reserve and Kirindy Mitea National Park. Despite its large extent of occurrence, Helictosperma malacophylla is threathened locally by reduction of its habitat through slash-and-burn agriculture, logging for timber and charcoal and burning to improve grazing. Based on the above observations, the species is assessed as Near Threathened.b


 

 


 

 
 
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