horseshoe-vetch

The Century Dictionary: The Encyelopedic Lexicon of the English Language · 1887 · p. 235

(hérs’shé-vech), n. A le- guminous plant of the genus Hippocrepis, H. comosa, cultivated for the beauty of its flowers, which are yellow, in umbels of 6 or 8: so called from the shape of its legumes. Also horse-vetch.