Letestuella tisserantii G.Taylor, Bull. Brit. Mus. (Nat. Hist.) Bot. 1: 57 (1953)

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

33. Letestuella tisserantii G.Taylor, Bull. Brit. Mus. (Nat. Hist.) Bot. 1: 57 (1953)

Letestuella chevalieri G.Taylor, Bull. Brit. Mus. (Nat. Hist.), Bot. 1: 59 (1953)

Leiothylax warmingii (Engl.) Warm., Danske Vid. Selsk. Skrift. Ser. VI. ix 150 (1899)

Type.

Central African Republic, Tisserant 1769 (holotype: BM; isotype: P).

Specimens examined.

Near Goyoum in Sanaga River, 20 km west of Deng Deng, F.J. Breteler 981 (WAG); Plateau de l’Adamaoua, Vina waterfall, 15 km from Ngaoundere, Zehnder 163 (ZT).

Habitat.

River rapids and waterfalls in tropical rain forest.

Distribution.

Benin, Cameroon (Fig. 25 ), Central African Republic, Mali, Namibia and Niger.

Conservation status in Cameroon.

Letestuella tisserantii is listed on http://www.iucnredlist.org as Least Concern ( Diop 2010d) since it occurs in many countries. The taxon is known from two localities in Cameroon. The extent of occurrence is less than 100 km2, and the area of occupancy is less than 10 km2. Dams on the Sanaga River and agricultural activities are the main threats to the species. Based on the threats and the number of localities where the species is found, L. tisserantii is here assessed as Endangered. IUNC Red List Category: Endangered ENB2ab (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.