Obs. In 5 yerdhoue. [f. YARD sb.1 + HOVE sb.1 Cf. TUNHOOF.] prob. Ground Ivy (Nepeta Glechoma).
c. 1430. M. E. Med. Bk. (Heinrich), 221. Herbe pro balneis. Tak yerdhoue [etc.].
c. 1460. J. Russell, Bk. Nurture, 991. The makyng of a bathe medicinable. Holy hokke & yarde-hok [? error for yardehof].
