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Plant Form: Perennial herb.
Size: Up to 1 m tall.
Stem: Green or greyish, more or less hairless.
Leaves: Opposite, undivided, to 50 x 10 mm.
Flowers: Drooping, with hairless, pinkish, richly-veined bladder shape 8-15 mm long that becomes balloon-like in fruit, and white, deeply divided petals 1-2 cm long.
Fruit and Seeds: Capsule 5-10 mm long, opening with six teeth.
Habitat: Pastures and croplands.