Herbs, chlorophyllous, autotrophic. Stems erect, glabrous or papillose distally. Leaves cauline, sometimes appearing basal, alternate or pseudoverticillate in 1-4 whorls; petiole present; blade not maculate, broadly elliptic to orbiculate, subcoriaceous, margins crenate-serrate to serrate, plane, surfaces glabrous. Inflorescences solitary flowers, not lax in bud or flower, erect in fruit; peduncular bracts present or absent. Pedicels absent. Flowers radially symmetric, spreading or nodding; sepals 5, connate proximally, often obscurely so, calyx lobes ovate to narrowly ovate; petals 5, distinct, creamy white, without basal tubercles, corolla rotate to broadly campanulate; intrastaminal nectary disc absent; stamens 10, included; filaments broad proximally, gradually narrowed medially, slender distally, glabrous; anthers oblong, without awns, with tubules, dehiscent by 2 round pores; pistil 5-carpellate; ovary imperfectly 5-locular; placentation intruded-parietal; style (exserted), straight, expanded distally; stigma 5-lobed, without subtending ring of hairs. Fruits capsular, erect, dehiscence loculicidal, no cobwebby tissue exposed by splitting valves at dehiscence. Seeds ca. 1000, fusiform, winged. x = 11, 12, 13, 16.
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Herbs perennial, small, glabrous, stoloniferous. Leaves radical, petiolate, leathery, serrulate. Flower solitary, terminal on long stalk. Sepals 5, deeply lobed, persistent. Petals spreading, white or pink, orbicular. Stamens (8–)10; filaments subulate, base glabrous; anthers with tubes, opening by 2 apical pores; disk obscure. Ovary globose or subglobose; ovules on thickened placentas on inner angles of loculi; style straight, apex clavate; stigma 5-toothed. Seeds small, testa elongated at both ends. n = 13.
Pet 5; filaments slender, slightly widened near the base; anthers subapically attached, the pollen-sacs narrowed above the filament and each with an apical pore; ovary subglobose, concave at the top; style well developed; stigma peltate, with 5 erect marginal lobes; capsule subglobose, opening from the top down; delicate perennial from slender creeping roots, with 1–4 sets of deciduous, opposite or ternate lvs near the base; fls white, solitary, terminal, nodding, long-peduncled. Monospecific.
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