A. jupunba (C.L. von Willdenow) Britton & E.P. Killip - bottom left center seed topography, top left cotyledon concealing radicle (L) and embryonic axis (R), bottom center seeds, testa SEMs; A. jupunba (C.L. von Willdenow) Britton & E.P. Killip var. trapezifolia (M.H. Vahl) Barneby & J.W. Grimes - bottom far left seed topography.