Sagittaria montevidensis Cham. & Schl. subsp. calycina (Engelm.) Bogin
Family - Alismataceae
Leaves - Petioles thick, terete, spongy, mostly erect but also reclining, to +.75m. Blades sagittate, glabrous.
Inflorescence - Typically shorter than leaves, decumbent. Flowers in whorls or pairs at nodes.
Flowers - Perfect. Petals 3, white with yellow base. Sepals 3, green. Pedicels thick, to 5cm long.
Flowering - June - September.
Habitat - Shallow water, wet areas.
Origin - Native to U.S.
Other info. - This is the only Sagittaria in Missouri with such thick, decumbent pedicels.
All other members of the genus in this state have the inflorescence erect and with thin pedicels.
Photograph taken off Highway 9, Platte County, MO., 7-8-99.