Parapiptadenia
Seed, cotyledon, embryo, and testa:
P. blanchetii (G. Bentham) J.P.M. Brenan - bottom left seed topography;
P. pterosperma (G. Bentham) J.P.M. Brenan - bottom center seed topography;
P. rigida (G. Bentham) J.P.M. Brenan - top left cotyledons not concealing radicle (L) and embryonic axis (R), left center seed topography, testa SEM, bottom right seeds.