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Genus :


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Species of this Genus


Annual or perennial, viscidly pubescent, herbs. Leaves alternate or opposite above, entire, softly pubescent. Flowers solitary, axillary, in shades of white, purple or red. Calyx deeply 5-partite, lobes narrow or often foliaceous. Corolla funnel-shaped or salver-shaped, tube long, often swollen above, limb normally 5-lobed, lobes unequal or obscurely 2-lipped. Stamens  attached in corolla tube, one of them being sterile. Ovary 2-locular; stigma indistinctly 2-lobed; ovules numerous. Fruit a dry, 2-valved capsule.