| a North American herb, Jeffersonia diphylla, having a single white blossom and leaves divided in two. |
twin·leaf  (twĭn'lēf') n. pl. twin·leaves (-lēvz') An eastern North American woodland plant (Jeffersonia diphylla) having basal leaves deeply cleft into two kidney-shaped lobes and a solitary white flower borne on a long scape. |