Pollen from several different interspecific F, hybrids inHibiscusL. sectionFurcariaDC (Malvaceae) was studied. Morphological features segregated in several hybrids, indicating that the haploid spore genome does contribute information for exine patterning. Also, in the one set of reciprocal hybrids available, reciprocal differences appeared. That suggests that maternally-inherited factors may also be involved in the control of exine morphology.