Echinodorus berteroi (Spreng.) Fassett var. berteroi

Tall Burhead, Cellophane Plant

Echinodorus berteroi var berteroi plant

Family - Alismataceae

Leaf - Leaves basal, on long petioles with sheathing bases. Blades ovate, glabrous.

Echinodorus_berteroi_var_berteroi_leafLeaf.

Inflorescence - Erect, with several whorls of 3-8 flowers. On well developed plants later in season, inflorescence may be branched.

Echinodorus_berteroi_var_berteroi_stemInflorescence axis.

Echinodorus_berteroi_var_berteroi_inflorescenceInflorescence.

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.

Echinodorus_berteroi_var_berteroi_calyxCalyx.

Echinodorus_berteroi_var_berteroi_flowersFlowers.

Fruits - 2.5-3.5 mm long, brown, beaked, 10-ribbed.

Echinodorus_berteroi_var_berteroi_fruitsWhorl of fruit clusters.

Echinodorus_berteroi_var_berteroi_fruits2Fruit cluster.

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).



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