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- W2047881569 abstract "The four genera investigated show solitary sulcate pollen grains. The structure and sculpture of the sporoderm is very similar in Bocageopsis and Unonopsis, and supports the close relationship of both genera; their flower morphology also is very similar. In contrast, the sporoderm of Ephedranthus, and especially that of Malmea, is different in some characters and suggests more remote relationships; this is also confirmed by differences in flower morphology. Within this group of genera a distinct exine progression can be recognized from non-columellate (Malmea) to granular (Unonopsis guatterioides), further to somewhat irregularly (Bocageopsis, some Unonopsis species), and finally to very regularly columellate (Ephedranthus). The sculpture of the tectum varies from a reticulum with large lumina (Malmea) to one with small perforations (Ephedran- thus). Within the Annonaceae the genus Malmea is among the most primitive in respect to pollen structure. The sulcus of the four genera is very large and runs over ½ of the pollen grain. It is characterized by a reduction of the exine and a bulgy thickening of the intine." @default.
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- W2047881569 date "1985-01-01" @default.
- W2047881569 modified "2023-09-27" @default.
- W2047881569 title "Pollen Ultrastructure and Its Systematic Relevance in Bocageopsis, Epbedranthus, Malmea, and Unonopsis ( Annonaceae)" @default.
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