Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† ŏphĭostaphylon, i, n., = ὀφιοστάφυλον, i. q. vitis alba, the white vine, white bryony: vitis alba est, quam Graeci ampeloleucen, alii ophiostaphylon … appellant, Plin. 23, 1, 16, § 21 (dub.; Jahn, staphylen).