Usually foetid, annual herbs, sometimes perennial and shrubby. Calyx tubular, 5-lobed; the tube circumscissile near the base after anthesis, leaving an annular remnant which expands in fruit. Corolla white, violet or purplish: tube long and narrow, flared upwards with short cuspidate or caudate lobes. Fruit a spherical, spiny (rarely spines 0) usually dehiscent capsule.
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