1688. R. Holme, Armoury, II. 58/1. He beareth Argent, an Unifoile Vert…. Vnifoile or Vnfall. This is an Herb that never hath more then one leaf from a Root,… it is also called one blade. [Hence in Berry, Encycl. Her. (c. 1828), Elvin (1889), and in some recent Dicts. as a bearing in Heraldry.]
