The special words for forms of lichen are almost as good as the special words for the textures of ants.
The Foliose, The Crustose and The fruticose.
Areolate, Filamentous, Placodioid, Byssoid and Calicioid
Who can forget Cladoniform and the Squamulose!
And must we mention the Gelatinous and Leprose?