Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† peplis, ĭdis, f., = πεπλίς, the name of two plants, one of which was also called porcilaca, Plin. 20, 20, 81, § 210; and the other syce, meconion, or mecon aphrodes, id. 27, 12, 93, § 119.