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Plant Form Upright annual or perennial herb. Size 1-3 m tall. Stem Green or reddish green, very hairy, square. Leaves Opposite arranged, hairy, blade is egg shaped or oval shaped, possibly heart shaped. Flowers Pinkish or lavender blue tubular flowers, singly or in clusters of up to 5. Fruit and Seeds Lobed capsule that divides into 2 nutlets with a single seed each. Brown to black with whitish markings. Habitat Roadsides, pastures, stockyards, waterholes. Distinguishing Features As flowers die, distinctive tube remains. Impacts Unpalatable, forms dense thickets, competes with commercial crops and native vegetation.