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Fls 4–5-merous; cal without an internal membrane; cal-lobes wholly green; cor marcescent, tubular to funnelform or campanulate, without folds or plaits in the sinuses but sometimes with fimbriate scales at the orifice, and regularly with nectary-glands alternating with the stamens toward the base within; ovary sessile or short-stipitate, the stigmas sessile or on a short, indistinct style; ovules in two rows or bands along the sutures of the ovary; seeds numerous, smooth; glabrous herbs, ours taprooted annuals or biennials with sessile or short-pedicellate fls in thyrsoid to umbelliform cymes. 100, widespread.
Herbs annual, biennial [or perennial]. Leaves opposite [or whorled]. Flowers terminal, solitary or in cymes, 4 or 5-merous. Calyx without intracalycular membrane. Corolla tubular or funnelform, either without appendages or with a vascularized fringed scale across base of each lobe, plicae absent. Nectaries at base of corolla tube. Stamens inserted on corolla tube. Capsules 2-valved, many seeded. Seeds smooth to warty.
