Home Les Plantes Menacées du Gabon - Threatened Plant Species of Gabon
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bas Ogooué
Ivindo
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Published In: Adansonia: recueil périodique d'observations botanique, n.s. 7: 511, pl. 2. 1967. (Adansonia, n.s.) Name publication detail
 

Project Name Data (Last Modified On 12/17/2018)
Acceptance : Accepted
Taxon Profile     (Last Modified On 2/12/2019)
Description: Plant up to 18 cm tall, densely woolly and floccose with long white hairs but often glabrescent and in addition scattered with minute glandular hairs. Rhizome usually slender or sometimes fairly stout and woody. Stipules very broadly triangular-ovate to narrowly so, acute. Leaves peltate; petiole continuing into the midrib with a distinct angle, blade held in a more or less horizontal position, symmetrical to slightly asymmetrical, usually more or less circular, sometimes broadly obovate-elliptic or broadly ovate-elliptic, with a rounded top. Inflorescence containing (1-)2-3 male flowers and 1 terminal female flower, positioned at about the same level as the leaf blades. Fruit pendulous but on a more or less straight pedicel, broadly elliptic to more or less circular, pale reddish to pinkish.
Habitus: Herb
Phenology: Flowers have been observed from February to November. Fruits have been observed in July, September, and October.
Habitat: Terrestrial, often in large groups, in cracks, on rocks or sheer rock faces and ridges containing iron; in shaded or medium shaded sites in submontane primary forest or below low trees and shrub, at 700-1000 m elevation.
Distribution: Gabon (endemic)
Distribution Note: This species is known from localities: Belinga, province of Ogooué-Ivindo (Northeastern of Gabon), and Pelé Mountains, province of Nyanga (Southwestern of Gabon).
Phytogeographical type: Guineo-Congolian Region, Lower Guinea domain, Phytogeographical type Linking Refuge and Continental.
Note: This endemic species is probably more represented in the field than what the available collections suggest. Begonia ferramica was in cultivation at WAG (Sosef, 1994).
Literature:
Case Study: Ivindo

Conservation assessment     (Last Modified On 2/12/2019)
Red List Category: Endangered
Status of Conservation Assessment: Preliminary
Note: EN B2ab(i,ii,iii,iv,v). Based on a 2 km x 2 km cell size, the AOO is estimated at 36 km2, and the EOO is 2575 km2, both values under the limit for Category "Endangered" under Criterion B. This species is known from 16 specimens, collected from 1964 to 2012, 11 of which are from Belinga, province of Ogooué-Ivindo (Northeastern of Gabon), and 5 from Pelé Mountains, province of Nyanga (Southwestern of Gabon). We estimate that the subpopulations corresponding to these specimens are not extirpated, due to the forest coverage still important in the collected areas. The 16 collections represent 2 subpopulations, none of which being located in a protected area. This species appears to have a very strict ecology, growing exclusively on ferruginous soil. Endemic to Gabon, and located above 600 m in altitude, its habitat is also threatened by mining activities in both Belinga and Mayombe, where iron extraction is projected. The 2 subpopulations represent 2 locations. Mining activities could lead to the degradation of the quality of its habitat, and hence to a decline of its extent of occurrence, its area of occupancy, its number of locations, and number of mature individuals. It is preliminary assessed as EN B2ab(i,ii,iii,iv,v).

 


 

Specimens whose coordinates are enclosed in square brackets [ ] have been mapped to a standard reference mark based on political units.
 
 
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