Family: Alismataceae
giant arrow-head, hooded arrow-head, long-lobed arrow-head, Mississippi arrow-head
Dennis Albert
Hugh Wilson
University of Wisconsin - Madison (WIS-VP)
Etymology: Sagittaria: from Latin sagitta, "arrow," because of the leaf shape
Plants: erect or floating, annual, emergent aquatic, 4"-40" tall, leaning when mature
Leaves: long-stalked; arrow-shaped if erect, long and narrow if aquatic
Flowers: white, 3-parted, 3/4"-2" wide, petals with dark-yellow bases; inflorescence of 3-12 whorls of flowers; blooms June-Oct.
Fruits: dry, flattened, winged seed
Habitat: marshes, streams
Conservation Status: Special Concern
Plants: erect or floating, annual, emergent aquatic, 4"-40" tall, leaning when mature
Leaves: long-stalked; arrow-shaped if erect, long and narrow if aquatic
Flowers: white, 3-parted, 3/4"-2" wide, petals with dark-yellow bases; inflorescence of 3-12 whorls of flowers; blooms June-Oct.
Fruits: dry, flattened, winged seed
Habitat: marshes, streams
Conservation Status: Special Concern
Emergent aquatic herbs of shorelines and margins of backwaters, ponds and wetlands.
Rare statewide, found only on western edge of the state along the Mississippi and Wisconsin rivers where it is occasional. This species has disproportionately thick pedicels relative to the other Sagittaria species in the flora. All S. montevidensis individuals in Wisconsin are attributable to S. montevidensis ssp. calycina (Engelm.) Bogin. Keener (2005) provided evidence that the subspecies of S. montevidensis are polyphyletic and recommended, but did not validly propose, that S. calycina Engelm. should be resurrected in place of S. montevidensis ssp. calycina.
Rare statewide, found only on western edge of the state along the Mississippi and Wisconsin rivers where it is occasional. This species has disproportionately thick pedicels relative to the other Sagittaria species in the flora. All S. montevidensis individuals in Wisconsin are attributable to S. montevidensis ssp. calycina (Engelm.) Bogin. Keener (2005) provided evidence that the subspecies of S. montevidensis are polyphyletic and recommended, but did not validly propose, that S. calycina Engelm. should be resurrected in place of S. montevidensis ssp. calycina.
Flora of North America: Flora of North America Floristic Rating: Coefficient of Conservatism = 8, Wetland Indicator = OBL WIS DNR-Bureau of Endangered Resources: Detailed information on Wisconsin listed species including state and federal status, photos, etc. USDA Plants Database: Federal Distribution and detailed information including photos Dan Tenaglia's The Missouri Flora: Fabulous photographs; detailed descriptions; color and leave arrangement key.
Hugh Wilson