. . . "Collema nigrescens var. ryssoleum" . . _:b76362510 "Index Fungorum id" . "978499" . _:b76362510 . "Tuck., 1866" . _:b76362510 "463166" . . . . "463166" . _:b76362510 . _:b76362510 . "Collema nigrescens var. ryssoleum Tuck., 1866" . . "Collema nigrescens var. ryssoleum" .