1. One genus; usually included in family Hydrangeaceae
   - subfamily Philadelphaceae

Type of: rosid dicot family

Part of: family Hydrangeaceae, hydrangea family, Hydrangeaceae

Encyclopedia: Philadelphaceae

• genus Marchantia
• genus Marmota
• genus Marrubium
• genus Marsilea
• genus Martes
• genus Martynia
• genus Masdevallia
• genus Masticophis
• genus Mastigoproctus
• genus Mastodon
• genus Mastotermes
• genus Matricaria
• genus Matteuccia
• genus Matthiola
• genus Maxillaria
• genus Maxostoma
• genus Mayaca
• genus Mayetiola
• genus Mazama
• genus Meconopsis
• genus Medicago
• genus Medinilla
• genus Megachile
• genus Megaderma
• genus Megalobatrachus