Botanical name: Lobelia alsinoides Family: Campanulaceae (Bell flower family)
Synonyms: Lobelia trigona
Chickweed Lobelia is a small annual herb, growing to 15-30 cm tall. Branches are trailing and 3-winged. Leaves are alternate, sparse; leaf-stalk 1-3 mm, hairless; blade nearly round, broadly ovate, elliptic, or lanceshaped, 7-14 x 4-6 mm, both surfaces rough but hairless, base wedge-shaped or broadly wedge-shaped, margin rounded toothed or crenulate, tip rounded, blunt, pointed, or tapering. Flowers are borne singly in leaf-axils, on slender stalks at leaflike bracts, forming a lax raceme. Flower-stalks are 2-2.7 cm long, slender, hairless; base with 2 lanceshaped bracteoles about 3 mm. Flowers are blue-pink, 2-lipped. Upper lip is 2-lobed, erect and the lower one is 3-lobed, spreading out. Flowers have 5 stamens, the lower 2 protrude out. Capsules are 2-3 mm long. Flowering: October-November.
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The flower labeled Chickweed Lobelia is ...