Saxicolella nana Engl., Bot. Jahrb. Syst. 60(4): 456 (1926)

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

39. Saxicolella nana Engl., Bot. Jahrb. Syst. 60(4): 456 (1926)

Type.

Cameroon, near Mbalmayo, Mildbraed 7749a (holotype: B; isotype: U).

Specimens examined.

Cameroon, near Mbalmayo, Nyong River, 644 m alt, Mildbraed 7749a (YA); 11°27'N, 3°22'E, 28 Feb 2007, M. Kato, R. Imaichi, S. Koi, & N. Katayama CMR-129 (YA).

Habitat.

River rapids and waterfalls.

Distribution.

Cameroon (Fig. 25 ).

Conservation status in Cameroon.

Saxicolella nana is listed on http://www.iucnredlist.org as Vulnerable ( Ghogue 2010q). Onana and Cheek (2011) assessed this species as Critically Endangered, since at that time it had not been collected since the first collection many years ago. The taxon is endemic to Cameroon and is known from only Nyong River near Mbalmayo. The species was, however, collected again by Kato and associates in 2007. The area of occupancy of this species can be estimated to be less than 20 km2. The extent of occurrence -estimated to be less than 2 km2. The main threat is agricultural activity. The species is here reassessed as Endangered. IUCN Red List Category: Endangered ENB2ab (ii, 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.