Sphaerothylax linearifolius A checklist of rheophytes of Cameroon Kuetegue, Felix Sonke, Bonaventure Ameka, Gabriel K. PhytoKeys 2019 121 81 131 2A2D207F-BBEC-57C2-81E1-6FC309F0A157 Engl., Bot. Jahrb. Syst. 43 (4): 378 (1909) Engl., Bot. Jahrb. Syst. 43 (4): 378 1909 Magnoliopsida Podostemaceae Ledermanniella CoL Plantae Ledermanniella linearifolia Malpighiales 0 81 Tracheophyta species linearifolia   Sphaerothylax linearifoliusEngl., 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 linearifoliais 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. linearifoliais 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. linearifoliais currently reassessed and maintained as Endangered. IUCN Red List Category: Endangered ENB2ab (iii).