• Pareronia Bingham, 1907
• Pedronia Green, 1922
• Peperidia H.G.L. Reichenbach, 1829 (uncertain) [Family: Chloranthaceae]
• Peperidia Kosteletzky, 1833 (unaccepted) [Family: Piperaceae]
• Peperina Hreblay, 1992 (uncertain)
• Peperomia Ruiz & Pavón, 1794
• Peperonota Westwood, 1847
• Peplonia Decaisne in Alph. de Candolle, 1844
• Peponia Greville, 1863 † [Order: Bacillariophyta (awaiting allocation)]
• Peponia Naudin, 1866 accepted as Peponium Engler in Engler & Prantl, 1897 [Order: Cucurbitales]
• Peronia Brébisson & Arnott ex Kitton, 1868 [Family: Peroniaceae]
• Peronia Duncan, 1889 (uncertain) [Family: Echinodermata (awaiting allocation)]
• Peronia Fleming, 1822 [Family: Onchidiidae]
• Peronia Redouté, 1811 (unaccepted) [Family: Marantaceae]
• Peronia Robineau-Desvoidy, 1830 accepted as Australophyra Malloch, 1923 [Family: Muscidae]
• Peronia Troschel, 1845 (unaccepted) [Family: Lasaeidae]
• Perronia Gray, 1841 accepted as Perrona Schumacher, 1817
• Petersonia Cummins & Y. Hiratsuka, 2003 [Family: Mikronegeriaceae]
• Petersonia Hawkeswood, 2007 [Family: Buprestidae]
• Petronia Barbosa Rodrigues, 1877 (unaccepted) [Family: Orchidaceae]
• Petronia Kaup, 1829 [Family: Passeridae]
• Pteronia F. Schmitz, 1897 accepted as Picconiella G. De Toni, 1936 [Family: Rhodomelaceae]
• Pteronia Linnaeus, 1763 [Family: Asteraceae]