Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
fŏlĭōsus, a, um, adj. [folium], leafy, full of leaves: aizoum foliosum usque ad cacumen, Plin. 25, 13, 102, § 161: arbor foliosior, id. 12, 11, 23, § 40.