BUPLEURUM, HARE'S-EAR, or Thorough-ewax: A genus of the digynia order, belonging to the pentandra class of plants; and in the natural method ranking under the 45th order, Umbellatæ. The involucre of the partial umbels are large in proportion, and pentaphyllous; the petals involuted or rolled inwards; the fruit roundish, compressed, and striated. The principal species is the fruticosum or shrubby Ethiopian hartwort. This rises with a shrubby stem, dividing into numerous branches, forming a bushy head five or six feet high, adorned with oblong, oval, entire leaves of a pale green colour, placed alternate, with yellow flowers in umbels at the ends of the branches, which appear in July and August, and are sometimes succeeded by ripe seeds. It may be propagated by cuttings.