Now rare or Obs. [ad. L. umbōn-, stem of umbo UMBO.]
† 1. Bot. A style or pistil. Obs.
1633. Gerarde’s Herbal, I. xcii. 166. Each of these floures hath six leaues,… with so many white chiues or threds, and a little blewish umbone in the midst.
1708. Kersey, Umbone or Horn,… any pointed Style or Head in the middle of a Flower.
1725. Fam. Dict., s.v. Virginia Climber, The Leaves are of a whitish Colour,… but the strongest Part is the Umbone, which rises in the middle.
1728. Chambers, Cycl., s.v., There is also an Umbone call’d doubly-pointed, or by-parted, as in the Peony; and sometimes the Umbone has four sharp Points.
2. Conch. = UMBO 3 a.
1867. Murchison, Siluria (ed. 4), ix. 195. Beneath the beak or umbone a small area pierced by a round foramen.
