Caesalps on southern continents, part 3

Having covered Australia and South America, let us turn to Africa, where caesalps dominate some of the most extensive types of vegetation, and characterise important ecosystems ( and and and and

Much of tropical Africa is covered by woodlands and savannas dominated collectively by the caesalps Brachystegia (, Julbernardia ( and Isoberlinia (, all of which are ectomycorrhizal.

Extensive savanna in tropical southern Africa is dominated by Colophospermum ( and, which is not ectomycorrhizal.

Minor areas are dominated by the small trees Baikiaea ( and and Burkea ( and and and

Tropical rainforest is in places dominated by Gilbertiodendron (, Julbernardia and Cryptosepalum (, all of which are ectomycorrhizal, and possibly also Baikiaea (, Cynometra and Tetraberlinia (

Tropical rainforest elsewhere contains Anthonotha (, Berlinia (, Microberlinia (, Aphanocalyx (, Paramacrolobium (, Didelotia and Afzelia (, all of which are also ectomycorrhizal ( and despite failing to dominate the canopy.

Dialium occurs as a minor component of equatorial rainforest in Africa (e.g., as it does in South America.

As on the other southern continents, there are shrubby/weedy caesalps in the genera Cassia, Senna, Chamaecrista, Piliostigma and Bauhinia ( In addition there is Pterolobium ( and, which does not occur on the other southern continents.

Caesalps in the form of large shrubs or small trees occur in semi-deserts in Africa, e.g. Parkinsonia (shared with South America), Ceratonia ( and Dialium ( and and

Guibourtia in the form of trees ( and extends to extratropical southern Africa, as a minor part of the vegetation, as do small trees of Schotia ( and Peltophorum. However, the only ectomycorrhizal caesalp that extends considerably into South Africa is Afzelia quanzensis.

To be continued...

Posted on Νοέμβριος 08, 2021 1204 ΠΜ by milewski milewski


Erythrophleum occurs in both Australia and Africa ( Hymenaea occurs in both South America and Africa (

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The caesalp Umtiza, which is a small tree, is restricted to South Africa well beyond the tropics: and and

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