Eugenia dusenii Engl., Notizbl. Koenigl . Bot. Gart. Berlin 2: 289 (1899)

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

Eugenia dusenii Engl., Notizbl. Koenigl. Bot. Gart. Berlin 2: 289 (1899)

Myrtus dusenii Kuntze, Deutsche Bot. Monatsschr. 21: 173 (1903)

Type.

Cameroon. Mundemba, Mana bridge, 4°58'N, 7°00'E, 11 Jan 1998, M. Cheek 8845 (holotype: K; isotype: YA).

Description.

Small erect shrub, up to 1.5 m; stem very flexible; leaves small and narrow, 2-5 × 0.3-0.5 cm; strongly rooted; white-flowered.

Specimens examined.

Ndian waterfalls at Bulu docks, 4°56'N, 8°51'E, 17 Jan 1985, D. W. Thomas 1985 (YA); Ndian River, west of Mundemba, 5°02'N, 8°53'E, 21 Jan 1986, J. Nemba & D. W. Thomas 319 (YA); Mundemba, Mana bridge, 4°58'N, 7°00'E, 11 Jan 1998, M. Cheek 8845 (YA).

Habitat.

Beds of swift-running rivers; seasonally inundated river banks; rocks at waterfalls, in evergreen rainforest.

Distribution.

Cameroon (Fig. 14 ), endemic to Cameroon.

Conservation status in Cameroon.

Eugenia dusenii is not listed on http://www.iucnredlist.org, but it was assessed as Vulnerable VU in Onana and Cheek (2011). The taxon is endemic to Cameroon and currently known from four localities. The area of occupancy is estimated to be about 16 km2, and the extent of occurrence is estimated at 4 km2. Plantation development and illegal logging of timber are ongoing at the localities. Based on these threats, and the continuous decline of vegetation cover in the area, and extent and /or quality of habitat E. dusenii is currently reassessed as Endangered. IUCN Red List Category: Endangered ENB2ab (ii, iii).

Figures

Figures 11 - 19. 11 Cyperus cataractarum K. Schum ex Engl. 12 Plectranthus cataractarum B. J. Pollard 13 Calvoa stenophylla Jacq. - Fel. 14 Eugenia dusenii Engl. 15 Biophytum talbotii (Baker f.) Hutch. & Dalziel 16 Biophytum zenkeri Guillaumin 17 Pandanus satabiei Huynh 18 Eragrostis barteri C. E. Hubb. 19 Ixora euosmia K. Schum.