The Collaborative International Dictionary
Sidalcea malviflora
checkerbloom \checkerbloom\ n. a perennial purple-flowered wild mallow of West North America ( Sidalcea malviflora) that is also cultivated.
Syn: wild hollyhock, Sidalcea malviflora.
Wikipedia
Sidalcea malviflora
Sidalcea malviflora is a species of flowering plant in the mallow family, known by the common names dwarf checkerbloom, Greek mallow, prairie mallow and dwarf checkermallow.