Figure 1.

Examples of typical habitats and growth habits of Sulawesi Begonia species. (a) Stream in primary montane forest on Gunung Bawakaraeng, SW Sulawesi. (b) Begonia bonthainensis growing terrestrially on the stream bank (wider habitat shown in a). (c) Begonia sanguineopilosa growing terrestrially on the forest floor. (d) Begonia rantemarioensis growing terrestrially on the forest floor, on a steep slope. (e) Begonia ozotothrix growing terrestrially on the forest floor, at the base of a limestone boulder. (f) Stream on limestone bedrock in lowland forest close to Luwuk, eastern Central Sulawesi. (g) Vertical limestone wall at side of stream (wider habitat shown in f), red arrows indicate Begonia willemii individuals. (h) Begonia willemii growing lithophytically on a limestone wall (wider habitat shown in g). (i) Limestone karst landscape with river and cave in Matarombeo, SE Sulawesi; the red arrow indicates Begonia watuwilensis growing lithophytically on a stalactite. (j) Begonia watuwilensis growing lithophytically on limestone. (k) Begonia matarombeoensis growing lithophytically on a limestone cliff. Photo credit: a, b, f–k, Wisnu H. Ardi; c–e, Daniel C. Thomas.