Obs. [OE. efe(n)láste, wk. fem.] Some plant. (Cockayne’s rendering ‘everlasting’ is due to mistaken etymology.)
c. 1000. Sax. Lecchd., II. 73. Grundeswelʓe, hole cersan, weʓbræde, efelaste, ontre … wel on buteran eal togædere. Ibid., III. 2. With heafod wræce ʓenim hamorwyrt & efenlastan nyðowearde.
c. 1265. Voc. Names Plants, in Wr.-Wülcker, 559. Mercurialis, i. euenlesten, i. mercurial [Evenlesten, The herb mercury, Halliwell].
