Saxicolella marginalis (G.Taylor) C.Cusset ex Cheek, Pl Mount Oku & Ijim Ridge, Cameroon, Conserv. Checklist 153 (2000)

Kuetegue, Felix, Sonke, Bonaventure & Ameka, Gabriel K., 2019, A checklist of rheophytes of Cameroon, PhytoKeys 121, pp. 81-131 : 81

38. Saxicolella marginalis (G.Taylor) C.Cusset ex Cheek, Pl Mount Oku & Ijim Ridge, Cameroon, Conserv. Checklist 153 (2000)

Butumia marginalis G.Taylor, Bull. Brit. Mus. (Nat. Hist.) Bot. 1: 55 (1953).

Type.

Nigeria, 25 Dec 1948, Keay, Savory & Russell, #25152 (BM). Basionym: Butumia marginalis G.Taylor, Bull. Brit. Mus. (Nat. Hist.) Bot. 1: 55 (1953).

Specimens examined.

Nigeria: Butum River, Utanga, 2 miles north of Bagga, Obudu, 25 Dec 1948, Keay, Savory & Russell FHI 25152 (YA); Cameroon: Fundong, 22 Nov 1996, M. Cheek 8740 (YA).

Habitat.

On smooth granite rocks in swift-flowing stream or river.

Distribution.

Cameroon (Fig. 25 ) and Nigeria.

Conservation status in Cameroon.

Saxicolella marginalis is listed on http://www.iucnredlist.org. The taxon has been assessed globally as Critically Endangered ( Ouedraogo 2010b). There is only one known collecting locality in the country. According to Ouedraogo (2010b) there is decline in the quality of the habitat due to pollution from laundry operations in the town of Fundong upstream of the site of this species. Based on this threat the assessment of Critically Endangered is maintained. IUCN Red List Category: Critically Endangered B1ab (iii) +2ab (iii).

Figures

Figures 20 - 25. 20 Ixora inundata Hiern 21 Virectaria angustifolia (Hiern) Bremek 22 Virectaria salicoides (C. H. Wright) Bremek 23 Deinbollia angustifolia D. W. Thomas 24 Deinbollia saligna Keay 25 Podostemaceae distribution.