Subshrubs or shrubs; trichomes (1) pointed with surfaces ± smooth, notched, or antrorsely barbed, and (2) retrorsely barbed along shaft and at apex. Stems erect or spreading. Leaves cauline; petiole present or absent; blade ovate, elliptic, lanceolate, or falcate, unlobed, margins dentate, serrate, crenate, or entire. Inflorescences racemes or panicles; peduncle inconspicuous. Pedicels not elongating in fruit. Flowers: hypanthium adnate to ovary proximally, free distally; perianth whorls differentiated; sepals green, connate basally, lanceolate, shorter than petals; petals white, distinct or connate, spatulate or obovate, erect proximally, spreading to divaricate distally (corolla salverform or appearing so), glabrous except hairy abaxially on midribs; nectary distal on ovary; stamens 5, exserted, filaments monomorphic, filiform, longer than anthers; anthers without distal connective extension; staminodes absent [present]; pistil pseudomonomerous, placenta subapical; stigma lingulate, 2-lobed, papillate. Fruits cypselae, ±clavate, straight; sepals persistent. Seeds 1, ovoid. x = 23.
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