Abstract
A detailed study of pollen-wall structure in Passiflora caerulea demonstrates that the wall of this species is complexly structured with the component parts interbedded in various ways. Noteworthy is the presence of ramifying rodlets of ektexine sporopollenin within the endexine. Ektexine and endexine are interpreted on a stain and sub-structural basis rather than on a positional basis.

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