A comparsion of the seeds of Worsleya and Hippeastrum.

The seeds of Worselya are black, lack an ala (wing), and are D-shaped, while the seeds of Hippeastrum are brown to black, have a paper-thin ala, and vary in shape from D-shaped to ovoid.

Seeds of Worsleya procera Seeds of Hippeastrum aulicum
Seeds of Hippeastrum blossfeldiae Seeds of Hippeastrum striatum
Worsleya procera (top, left), Hippeastrum aulicum (top, right), H. blossfeldiae (bottom, left), and H. striatum (bottom, right)