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Connecticut Wildflowers
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Water-plantain
Large water-plantain: Alisma triviale
Small water-plantain: Alisma subcordatum

The water-plantains have small flowers with three petals on greatly branched stems. The two species that grow in Connecticut look very much alike, other than the size of the flowers. Large water-plantain flowers are 1/4 inch wide; those of small water-plantain are less than 1/8 inch wide.

Some of the arrowheads (such as broadleaf arrowhead) resemble water-plantains, but their flowers are much larger (1/2 to 1 inch), and they lack the dense branching of the flower stems that is characteristic of the water-plantains.

• Family: Water-plantain (Alismataceae)
• Habitat: shallow water, mud
• Height: 8-36 inches
• Flower size: 1/4 inch across (large water-plantain) or 1/16 to 1/8 inch across (small water-plantain)
• Flower color: white
• Flowering time: June to September
• Origin: native

next white flower
next in water-plantain family
Alisma
Large water-plantain flower.
Alisma
Large water-plantain leaves.
Alisma
Small water-plantain.

Last updated November 13, 2005. © 2005 Connecticut Botanical Society. All rights reserved.