Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
cŏmōsus, a, um, adj. [coma], hairy, with much or long hair (rare): frons, Phaedr. 5, 8, 2: Phoebus, Auct. Priap. 37.
Transf., of plants, leafy: genus tithymali comosissimum, Plin. 26, 8, 45, § 71; 16, 6, 8, § 22.