Justicia (Water Willow) is a genus of shrub in the family Acanthaceae. They are listed as endangered by IUCN. They are native to U.S. Virgin Islands, The Contiguous United States, Puerto Rico, and Canada. Flowers are visited by Long-tailed Blue, Costa's Hummingbird, Gilded Hummingbird, and sweat bees. Individuals can grow to 5.3 m.
EOL has data for 17 attributes, including: