Ontogeny of the ovule and development of the embryo in Bombacopsis glabra (Pasq.) A. Robyns were examined. The ovule is bitegmic, crassinucellate, and anatropous. The exostome is eccentric relative to the endostome; stomata occur on the outer integument. The single archesporial cell functions directly as the megaspore mother cell. The embryo-sac is bisporic. The organization of the nuclei in the mature embryo-sac is normal. The antipodal cells disintegrate soon after formation. Double fertilization takes place; the zygote undergoes a long period of dormancy, but the primary endosperm nucleus divides immediately to produce first a nuclear-type, later a cellular-type endosperm. The zygote is of the caryophyllad type. Adventive embryos arise from single cells of the nucellus in the vicinity of the micropyle, and develop faster than the sexually produced embryo; this leads to anomictic renroduction.