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Begonia bonus-henricus

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Taxonomy [top]

Kingdom Phylum Class Order Family
PLANTAE TRACHEOPHYTA MAGNOLIOPSIDA CUCURBITALES BEGONIACEAE

Scientific Name: Begonia bonus-henricus
Species Authority: J.J.de Wilde
Taxonomic Notes: Sect. Squamibegonia

Assessment Information [top]

Red List Category & Criteria: Endangered B2ab(iii) ver 3.1
Year Published: 2014
Date Assessed: 2011-03-25
Assessor(s): Cheek, M.
Reviewer(s): Onana, J.-M.
Facilitator/Compiler(s): Lopez Poveda, L.
Justification:
Begonia bonus-henricus is an epiphyte of the trunks of cloud forest trees. None of its known records occur in protected areas. All its sites are vulnerable to clearance for farming and this has occurred and is ongoing at several sites.  First described in 1980, this species is unique in sect. Squamibegonia Warb. (characterized by peltate scales, indehiscent globose berries, inflorescences enclosed in sheathing bracts) in having long (c. 1 m) slender (1.5 mm diam.) pendulous or rooting stems. It was then known from just five collections at three sites: c 15 km S.E. of Ebolowa, Rumpi Hills and, in Bakossi, Ngomboaku and Ngussi (coll. from last two not seen). This geographical range is very similar to that of Newtonia duncan-thomasii, although the Begonia also occurs on Mt Kupe and has a slightly lower altitudinal range. Fifteen more collections in Bakossi thave since been added to those cited by De Wilde and Arends (1980). The assessment of this species in Cheek et al. (2004) of Vulnerable A3c is raised  to Endangered in Onana and Cheek (2011) since it is now known that the species has a small area of occupancy of only 40 km2, it is known from three locations and there is continuing decline in the extent and quality of its habitat due to expanding agriculture.
History:
2004 Vulnerable

Geographic Range [top]

Range Description: Species endemic to Cameroon (SW Region: Rumpi Hills, (one collection), Kupe-Bakossi (17 collections), S Region: Ebolowa (2 collections)).
Countries:
Native:
Cameroon
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population:

Population size is not known but is thought to be in decline.

Population Trend: Decreasing

Habitat and Ecology [top]

Habitat and Ecology: This hemi-epiphyte grows in undisturbed, mainly submontane forest; 660-1,300 m alt.
Systems: Terrestrial

Threats [top]

Major Threat(s): Clearance of forest for timber and agriculture at lower altitudes (below 1,000 m alt.) is unfortunately inevitable in the Bakossi area.

Conservation Actions [top]

Conservation Actions: This species is not recorded in any protected area, including the new ones created in Kupe-Bakossi, since all the records of the species from Kupe-Bakossi are outside the boundaries. It is to be hoped that further inventory work might show the species to be present within these protected areas and that it can be protected there.

Citation: Cheek, M. 2014. Begonia bonus-henricus. The IUCN Red List of Threatened Species. Version 2014.3. <www.iucnredlist.org>. Downloaded on 22 December 2014.
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