Red mangrove, Rhizophora mangle are characteristic of most mangrove swamps. They are easily identified by their prop-roots arising from trunks and branches. A small red mau grove with its prop roots stand. out among the pneumatophores of the surrounding black mangroves. n r rc. Interior of a mangrove swamp dominated by black mangrove (Avbc h germi nans), characterized by the short vertical aera- ting branches (pne uma, o- phores) arising from the roots..