Genera within a family

Family: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
(Lichen) Oak Moss(Ox)
usnea, = a moss. A genus of gymnocarpous lichens. (Usnate, is a salt produced by a combination of usnic acid with a base. - Usnic acid is a carbusnic acid.)
A Lichen known as Oak Moss()
usnea, = term for a lichen, derived from the Arabic word ushnah, = moss.