Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
actaea, ae, f., a strong-smelling plant, herb Christopher, Actaea spicata, Linn., Plin. 27, 7, 26, § 43.
Actaeus, a, um, adj., Ἀκταῖος, pertaining to Attica, Attic, Athenian: in Actaeo Aracyntho, Verg. E. 2, 24 (as being on the border of Attica): arces, of Athens, Ov. M. 2, 720; fratres, i. e. Clytos and Butes, ib. 7, 681: mel Hymetti, Col. 10, 386: imbres, a rain of honey, Stat. Th. 4, 453.
Hence, subst.: Actaei, ōrum, m., the inhabitants of Attica, Nep. Thras. 2, 1.
Actaea, ae, f., a female Athenian; of Orithyia, Ov. M. 6, 711.