Echinodorus berteroi (Spreng.) Fassett var. berteroi
Tall Burhead, Cellophane Plant
Family - Alismataceae
Leaf - Leaves basal, on long petioles with sheathing bases. Blades ovate, glabrous.
Inflorescence - Erect, with several whorls of 3-8 flowers. On well developed plants later in season, inflorescence may be branched.
Flowers - Trimerous, perfect. Sepals 4-5 mm, ovate, glabrous, persistent, reflexed in fruit. Petals 5-10 mm, broadly ovate, white. Stamens usually 12. Pistils numerous, forming a globose cluster.
Fruits - 2.5-3.5 mm long, brown, beaked, 10-ribbed.
Whorl of fruit clusters.
Flowering - July - September.
Habitat - Mud flats.
Origin - Native to the U.S.
Other info. - This species has an interesting distribution, in Missouri being found mostly in counties bordering the Missouri River. Like other members of the Alismataceae, it prefers open muddy areas which are not too heavily overgrown with other vegetation. Under favorable conditions it can form large populations.
Photographs taken at Klondike County Park, St. Charles, MO, 8-1-2011, 6-25-2012 and 8-3-2014, near Augusta, St. Charles County, MO, 8-27-2011, and Riverlands Migratory Bird Sanctuary, St. Charles County, MO, 7-21-2013 (SRTurner).