Ixora euosmia K.Schum., Bot. Jahrb. Syst. 33(2): 355 (1903)

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

Ixora euosmia K.Schum., Bot. Jahrb. Syst. 33(2): 355 (1903)

Ixora degemensis Hutch. & Dalziel, Fl. W. Trop. Afr. 2: 86 (1931)

Type.

Cameroon. Bipindi, bank of Lokoundje River, 02 Oct 1896, G. Zenker 1108, (holotype: K; isotypes: BR, HBG, MO, WAG, Z).

Description.

Shrub or small tree up to 5 m tall; leaves narrowly elliptic-oblong 10-19 × 2-4.5 cm; inflorescence terminal.

Specimens examined.

Lobe River, 7 km south of Kribi, 2°53'N, 9°54'E, 20 Feb 1969, J. J. Bos 3940 (YA); Songloulou falls, at 25 km southwest of Ngambé, Massock-Songloulou road, 3°35'N, 9°44'E, 24 Jan 1972, R. Letouzey 11103 (YA); 5 km southeast of Bipindi, 3°04'N, 10°25'E, 14 Jan 1987, Stephen D. Manning 1343 (YA); Nguti-Ntalè, Mbièr River, 5°15'N, 9°34'E, 13 Dec 2010, F. Kuetegue 226 (YA).

Habitat.

Inundated sandy or rocky banks of rivers, between rocks in streams or rivers, waterfalls; riverine forest.

Distribution.

Cameroon (Fig. 19 ), Equatorial Guinea and Nigeria.

Conservation status in Cameroon.

Ixora euosmia was not assessed by Onana and Cheek (2011) nor listed on http://www.iucnredlist.org. The taxon is currently known from 10 localities. The extent of occurrence of this species is about 36,900 km2 and the area of occupancy is about 44 km2. There is a dam built (hydro-electric dam at Songloulou on Sanaga River), and a proposed project, Memve’ele hydro-electric dam at Nyabezan (Ntem waterfall); and mining projects envisaged in Kribi. Based on these threats and the continuous decline of vegetation cover in the area, extent and /or quality of habitat I. euosmia is here assessed 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.