Erect, sparsely hirsute, taprooted annual 3-8 dm; lvs ovate or deltoid-ovate, 4-10 cm, scabrellate, decurrent on the long petiole; spikes secund, mostly solitary at the end of the branches, eventually 8-15 cm; cor blue, 3-4 mm wide; fr 2.5-4 mm, divergently 2-lobed to about the middle, each lobe composed of 2 united (but separable) nutlets, each nutlet sharply ridged longitudinally on the back, tapering to the summit, with an abaxial fertile chamber and a swollen, adaxial empty one. A pantropical weed, supposed to be native to Brazil, extending n. to Va., s. Ind., and Mo., and rarely farther as a waif. May-Oct. (Tiaridium i.)

Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

©The New York Botanical Garden. All rights reserved. Used by permission.

From Flora of Indiana (1940) by Charles C. Deam

Infrequent in moist, sandy, open, generally alluvial woods of the southern part of the state; more rarely in waste places and fallow fields.

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Indiana Coefficient of Conservatism: C = null, non-native

Wetland Indicator Status: FACW