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Decodon verticillatus (L.) Elliott var. verticillatus
swamp loosestrife, water-willow, whorled loosestrife
Decodon: Greek deca for "ten" and odous for "tooth"
|Plant: ||arching perennial, 1'-9' tall, semi-aquatic, emergent forb, often forms floating mats in soft sediment areas; stems woody at the base, angled, arching over and re-rooting in the water|
|Flower: ||pink, 5-parted, 1/3"-1/2" long, petals obvious, narrowing towards the base; inflorescence a dense cluster (cyme) of stalked flowers from the upper leaf axils; blooms Aug.-Sept.|
|Fruit:||rounded capsule with many seeds|
|Leaf:||short-stalked, lance-shaped, in whorls of 3 or 4 or in opposite pairs, lower leaf surface and stalks finely hairy|
|Habitat: ||wet; shallows, swamps, still water; in mucky, peaty soil|