Ledermanniella linearifolia Engl., Bot. Jahrb. Syst. 43(4): 378 (1909)

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

20. Ledermanniella linearifolia Engl., Bot. Jahrb. Syst. 43(4): 378 (1909)

Sphaerothylax linearifolius Engl., Veg. Erde 9(3, 1): 275 (1915)

Type.

Cameroon, 28 Aug 1908, C. Ledermann 440 (YA).

Specimens examined.

7 km south of Kribi, Lobe waterfall, Jan, J. Bos3591 (K); 7 km south of Kribi, Lobe waterfalls, Aug, De Wild 2876 (P, WAG, YA); Nkam, near Sahe, 3 km southwest Nkondjok road Bafang-Yabassi, Feb R. Letouzey 11146 (P).

Habitat.

River rapids and waterfall.

Distribution.

Cameroon (Fig. 25 ).

Conservation status in Cameroon.

Ledermanniella linearifolia is listed on http://www.iucnredlist.org. It was assessed as Endangered ( Ghogue 2010f). Onana and Cheek (2011) reassessed this species and maintained the Endangered status. The taxon is known from 6 localities. The extent of occurrence of L. linearifolia is about 42,848,649 km2 and the area of occupancy is about 16 km2. The main threats currently known from the localities are agriculture and touristic activities. Based on these threats, the number of localities currently known, and the continuous decline of vegetation cover in the area, extent and /or quality of habitat, L. linearifolia is currently reassessed and maintained as Endangered. IUCN 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.