Martius may refer to: Martius (month) the month of March on the ancient Roman calendar Campus Martius, the "Field of Mars" in ancient Rome Telo Martius, an ancient name for Toulon, France People Carl Friedrich Philipp von Martius (1794–1868), German botanist Hedwig Conrad-Martius (1888–1966), German phenomenologist Carl Alexander von Martius (1838–1920), German chemist, company founder and entrepreneur Other uses Dryocopus martius, the black woodpecker Martius yellow, a chemical compound and dye Trachycarpus martianus, also known as Martius' fan palm Hofmann-Martius rearrangement, in chemistry See also Marcius (disambiguation) Mars (disambiguation) Campus Martius (disambiguation)