Abstract
Abstract It has long been a matter of controversy whether to treat Cassine L. in southern Africa in a wide sense, or to recognize several segregate genera, such as Elaeodendron Jacq. f., Crocoxylon Eckl. & Zeyh., Lauridia Eckl. & Zeyh., Mystroxylon Eckl. & Zeyh. and Cassine s. str. The pollen morphology of the 14 southern African species currently included in Cassine s.l., as well as the three monotypic genera Allocassine N. Robson, Hartogiclla Codd, and Maurocenia Mill., has been studied by means of LM, SEM and TEM. Pollen grains in all species shed as monads, radially symmetrical, isopolar, tricolporate with colpus membranes conduplicate, tectate, subspheroidal, 14–30 μm in equatorial and 13–37 μm in polar diameter. On the basis of sexine sculpture three pollen types are recognized. Pollen type A (sexine reticulate) has been recorded in Maurocenia, Hartogiella, Cassine aethiopica, C. barbara, C. burkeana, C. eucleiformis, C. maritima, C. papillosa, C. parvifolia, and C. peragua; pollen type B (sexine fo...
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