Sagittaria montevidensis Cham. & Schl. subsp. calycina (Engelm.) Bogin

Sagittaria montevidensis plant

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.

Sagittaria montevidensis flower

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.
A synonym is Sagittaria calycina Engelm.

Photograph taken off Highway 9, Platte County, MO., 7-8-99.