Commelina communis L.
Family: Commelinaceae
Asiatic dayflower, common dayflower
Commelina communis image
Kitty Kohout  
Etymology: Commelina: after the two Dutch botanists Johan (1629-1692) and his nephew Caspar (1667-1731) Commelin, known to Linnaeus and Charles Plumier, a French Franciscan monk, botanist and traveler who apparently named this flower.
Plants: erect (then drooping), annual, 4"-14" tall forb; lax stems rooting from the lower nodes
Leaves: mostly hairless sheath open at the base sheath drawing
Flowers: blue, 3-parted, 1" wide, much smaller lower petal nearly white; folded bracts, below the flower, completely separated all the way to the base; blooms July-Sept.
Habitat: shade, semi-shade; moist; gardens, roadsides, disturbed areas
Conservation Status: Introduced - naturalized