[2][3] Most of the species have inconspicuous lichenized thalli that consist of scattered, small, loose, nearly microscopic green balls or foliose small flakes containing single-celled green algae in the genus Coccomyxa,[4] all interconnected by a loose network of hyphae.

The agaric fruit bodies themselves are nonlichenized and resemble other types of omphalinoid mushrooms.

Byssus botryoides is the type species of the now officially rejected generic names Phytoconis and Botrydina.

Acharius in 1810 described the thalli of L. hudsoniana as a lichen, Endocarpon viride, which is the type of another officially rejected name, Coriscium.

Hence literature on these lichenized agarics appears under a myriad of names, such as Omphalina, Gerronema, Phytoconis, Botrydina and Coriscium.