Plants perennial, rhizomatous; rhizome creeping. Stems erect, usually simple, 30-150 cm, with short, dense, eglandular pubescence, sparsely so toward base. Leaves sessile, 2 per node; blade prominently 3-5-veined, ovate-acuminate, round at base, (4-)6-10(-13) cm × (20-)30-50(-90) mm, appressed-pubescent on both surfaces. Inflorescences paniculate, narrow, many-flowered, open, bracteate, pedunculate, 10-50 × 3-5 cm, densely puberulent; bracts narrowly lanceolate, 3-15 mm, apex acuminate; peduncle ascending. Pedicels ascending, recurved near apex, ca. equaling calyx. Flowers nocturnal; calyx prominently 10-veined, tubular to narrowly campanulate and 6-9 × 3-4 mm in flower, turbinate and 10-12 × 4-5 mm in fruit, narrowed proximally around carpophore, veins parallel, green, broad, with pale commissures, puberulent, sometimes with few glands, lobes triangular-acute, 2-3 mm; corolla white, clawed, claw equaling calyx, broadened into limb, limb obtriangular, deeply lobed, 7-9 mm, lobes ca. 8, linear, appendages minute; stamens slightly longer than corolla; styles 3, ca. 2 times as long as corolla. Capsules narrowly ovoid, slightly longer than calyx, opening by 3 (splitting into 6) ascending teeth; carpophore 2-2.5 mm. Seeds dark brown, reniform, 0.8-1.5 mm, shallowly tuberculate. 2n = 48. Flowering late summer-fall. Rich woods; of conservation concern; 1000-1900 m; Ala., Ark., Ga., Ky., Miss., N.C., S.C., Tenn., Va. Silene ovata is a very distinctive species with large, ovate, acuminate, sessile, paired leaves, and very narrowly lobed white petals. The flowers open at night and are moth-pollinated.
Coarse perennial, 3-15 dm, puberulent or hirsutulous; lvs sessile, ovate to broadly lanceolate, 6-12 נ3-8 cm, acute or acuminate; infl open-paniculate, 1-5 dm; cal tubular, 6-8 mm, becoming inflated and 10-12 mm in fr; pet white, without auricles, the appendages minute, the blade 7-9 mm, deeply dichotomously dissected with usually 8 linear segments; carpophore 2-2.5 mm; styles 3; capsule dehiscent by 6 teeth; 2n=48. Woods; Va. and Ky. to Ga., Ala., and Ark. Summer.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.