Acacia Ataxacantha
''Senegalia ataxacantha'', commonly known as the flame thorn, is an African tree species with conspicuous red pods and numerous hooked prickles. Range It is widespread in sub-Saharan Africa from Senegal in the west to Sudan in the east, Namibia, Botswana, Zimbabwe, and in the Transvaal and KwaZulu-Natal. In arid regions it prefers low-lying sites near streams, watercourses and in valleys, but in higher rainfall areas is a common constituent of the bush, often favouring forest margins. Once established, young trees are quite frost-hardy. Description Its normal habit is that of a multi-stemmed, untidy, large shrub with a tendency for the shoots to scramble using their recurved prickles, and often develops into a single-stemmed tree of 5-10m in height and 300mm trunk diameter. The rounded crown of dense, dark green foliage is composed of very small pinnules. Translucent red pods provide a colourful display when backlit. The flaking bark is light grey, splitting longitudinally and tr ...
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Augustin Pyramus De Candolle
Augustin Pyramus (or Pyrame) de Candolle (, , ; 4 February 17789 September 1841) was a Swiss botanist. René Louiche Desfontaines launched de Candolle's botanical career by recommending him at a herbarium. Within a couple of years de Candolle had established a new genus, and he went on to document hundreds of plant families and create a new natural plant classification system. Although de Candolle's main focus was botany, he also contributed to related fields such as phytogeography, agronomy, paleontology, medical botany, and economic botany. De Candolle originated the idea of "Nature's war", which influenced Charles Darwin and the principle of natural selection. de Candolle recognized that multiple species may develop similar characteristics that did not appear in a common evolutionary ancestor; a phenomenon now known as convergent evolution. During his work with plants, de Candolle noticed that plant leaf movements follow a near-24-hour cycle in constant light, suggestin ...
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