any of various ferns of the genus Asplenium, esp A. trichomanes, that often grows on walls, having linear or oblong sori on the undersurface of the fronds
See also asplenium
spleenwort in American English
(ˈsplinˌwɜrt)
noun
any of a genus (Asplenium, family Aspleniaceae) of ferns with simple or compound fronds and elongated sori