Fig. 4 in Reconciling ecological and phytogeographical spatial boundaries to clarify the limits of the montane and alpine regions of sub-Sahelian Africa

Fig. 4. Schematic representation of the centres and sub-centres of the Cape element in sub-Sahelian Africa (from Carbutt, 2004; Carbutt and Edwards, 2012; updated from Weimarck, 1941). The high elevation sub-centres in particular are often fragmented, hence the need for two hyphenated names when considering two dominant enclaves of close proximity. The most modern and geographically accurate names have been used. For example, 'Abessinian Sub-centre' is now 'Ethiopian Sub-centre'; 'Rungwe Sub-centre' is now 'Nyika-Rungwe Subcentre'; 'Mitumba-Rwenzori Sub-centre' is an amalgamation of Weimarck's (1941) 'Katanga' and 'Kivu' Sub-centres, named after the Mitumba Highlands, and the dominant Rwenzori Mountains further north. The double-sided arrows denote possible dual-direction migration events that may have resulted in reciprocal exchange of taxa between centres.