Havardia
Seed, cotyledon, embryo, and testa:
H. mexicana (Rose) Britton & Rose - testa SEMs;
H. pallens (G. Bentham) Britton & J.N. Rose - bottom far left seed topography, top left cotyledon concealing radicle (L) and embryonic axis (R);
H. sonorae (S. Watson) Britton & J.N. Rose - bottom left center seed topography;
H. spp. - bottom center seeds.