| Alchornea villosa | Astragalus hymenostegis | Genus Astranthium | Genus Astrantia | Genus Astrebla | Genus Astripomoea | Genus Astrolepis | Genus Astronidium | Genus Astrophytum |

| Accipitrinae | Assiminea magdalensis | Chaos carolinense | Drunella cornutella | Dziedzickia separata | Liponema multicornis | Megamelus davisi | Phaonia flavitibia | Physalaemus moreirae |

| Medvedovskaya | Medvezh'yegorsk | Medvode | Medway | Medway | Medyn' | Medzev | Medzhibozh | Medzilaborce | Meeder |

| Meehoec Stock and Grain Farm | Meeker Airport | Meeker County | Meeks Hollow | Meeks Mountain | Meeks Table | Megquier Island | Mehoopany Creek |