Justicia americana [Acanthaceae]

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Scientific Name Justicia americana USDA PLANTS Symbol JUAM
Common Name American Water-willow ITIS Taxonomic Serial No. 34352
Family Acanthaceae (Acanthus) SEINet
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Description Habitat: Mud and shallow water; ponds, streams, marshes.
Plant: Upright, leafy, smooth perennial up to 40 inches tall, usually shorter; colony-forming.
Leaves: Opposite, linear to lanceolate or narrowly oblong, on short petioles or sessile; 3 to 6-3/4 inches long.
Inflorescence: A few or more white (occasionally violet) blossoms crowded on short spikes or clusters 3/8 to 1-1/4 inches long on stalks 2 to 6 inches long arising from upper leaf axils; each blossom with a corolla tube 3/8 to 1/2-inch long with 2 lips; upper lip deeply divided into 2 recurved lobes, lower lip 3-lobed with violet dots; 2 stamens.
Bloom Period: April to September.
References: "Manual of the Vascular Plants of Texas" by Correll and Johnston, "Wildflowers of Texas" by Geyata Ajilvsgi, "Shinners & Mahler’s Flora of North Central Texas" by Diggs, Lipscomb and O’Kennon and SEINet.
BONAP Distribution Map

Texas Status:

© Tom Lebsack 2022