THE PLANT ECOLOGY OF THE COAST BELT OF NATAL. 451 



Smaller trees belonging more properly to the scrub are 

 often mixed with the above, but not, of course, dominant, 

 e.g. Schmidelia monophylla, Clausena inaequalis, 

 Chfetachme aristata, Elteodendron capense, E. velu- 

 tinum, E. sphasrophyllum, Bridelia micrantha, 

 Apodytes dimidiata, Scutia commersoni, Baphia 

 racemosa, Antidesma venosum, Trimeria grandi- 

 folia, Spirostachys africana, Sapium mannianum, 

 Peddiea africana, Clerodendron glabrum, Grewia 

 occidentalis, Schotia brachypetala, Xanthoxylon 

 capense, Celastrus acuminatus, C. buxifolius, C. 

 undatus, Sapindus oblongifolius, Chrysophyllum 

 natalense, Mimusops obovata, M. caffra, Euclea 

 lanceolata, E. natalensis, Erythroxylon emargina- 

 tum, E. pictum, Scolopia zeyheri, Oncoba kraussiana, 

 Dovyalis zizyphoides, D. celastroides, Aberia caffra, 

 Garcinia gerrardi. Cola natalensis, Zizyphus muc- 

 ronata, Combretum gueinzii, C. erythrophyllum, 

 Cussonia spicata, C. natalensis, various Rubiaceous 

 trees (see under scrub), Royena lucida, Maba natalensis, 

 Olea verrucosa, Schrebera saundersiee, Acocan- 

 thera venenata, Cordia caffra, Ehretia hottentot- 

 tica, Halleria lucida, Cryptocarya woodii, Cyclo- 

 stemon natalensis, Croton gratissimus. 



The lianes characteristic of the scrub zone penetrate through 

 the forest, many of them climbing to the tops of the highest 

 trees, but they are not so abundant. The epiphytes, parasites, 

 undershrubs and herbs are also as described for scrub. 



It will be seen, therefore, that the essential point in which 

 high forest differs from the scrub which it replaces is simply 

 in the dominance of the tall timber trees. 



VI. GENERAL SUMMARY. 



The low-lying coast belt of Natal is ecologically a fairly 



uniform subtropical region. The topography is practically 



independent of the geological structure, which is described in 



outline. Numerous rivers at right angles to the coast-line 



