Species: * Acorus = Acorus (Unit 058) Acorus calamus = Sweet Flag (Unit 058) Acorus gramineus = Grassy Leaved Sweet Flag (Unit 058) Picture Notes: More Information: Distribution: Two species in N. Hemisphere; perennial herbs of marshy places. Synonyms: Acorus was included in the family Araceae in the past. Cronquist did so in 1981, but separated the Acoraceae in 1988. Hardiness Zone: USDA Zone (view USDA zone map) Size: Form: Bark: Stem/Bud: Leaves: Fall Color: Flower: Fruit: Uses: Problems: Culture: Links: Notes: Cronquist separates Acorus from Araceae as a separate family Acorace in his 1988 book. Even in his 1981 treatment, Cronquist says that Acorus stands apart from other members of the Araceae. Notes 2: Notes 3: Cultivars: