Shape and color : Different kinds of vegetable seeds vary in shape and color. For example, the seeds of cruciferous vegetables such as cabbage and radish are mostly spherical and dark brown or reddish-brown in color; The seeds of solanaceae vegetables such as tomatoes and peppers are kidney shaped or round and pale yellow to yellowish brown in color. The seeds of cucurbitaceae vegetables such as cucumbers and pumpkins are oblong or flat and white to pale yellow in color; The seeds of leguminous vegetables such as mung beans and cowpeas are short cylindrical or kidney shaped and green or reddish-brown in color