Petalonema Gilg Dataset English Wikipedia - Species Pages Classification genus Gravesia Name Homonyms Petalonema Schltr. 1915 , illegitimate homonym, not Berk. ex Correns 1889 (Cyanophyceae) nor Gilg. 1897 Petalonema Berkeley ex Kirchner, 1898 Petalonema Peter Petalonema Gilg