Silene muscipula L., it is an annual, erect, up to 60 cm tall, glabrous herb with younger shoots occasionally viscid. Leaves sessile, lower oblanceolate-spathulate, upper linear-lanceolate, up to 6 x 2 cm, narrowed at the base, glabrous. Flowers pink, 8-10 mm across, in terminal, many-flowered, more or less regularly branched dichasium; pedicels much shorter than calyx; bracts linear, usually as long as or longer than the calyx, scarious at the base. Calyx tube oblong-cylindrical at anthesis, (12-) 13-17 mm long, not contracted at the apex and oblong-clavate in fruit, umbilicate, glabrous, 10-nerved. nerves anastomosing, green or ± reddish; teeth ovate-lanceolate, c. 2 mm long, acute. Petal limb cuneate, obovate, 3-3.5 mm long, deeply emarginate or shortly notched; claws white, not or hardly exserted, glabrous; coronal scales oblong, 1.5-2 mm long, bifid, Stamens 10, filaments filiform, glabrous; anthers oblong, 1-1.25 mm long, yellow. Ovary oblong-cylindrical, stipitate, equal to slightly longer than the retrose hairy stipe; styles filiform, exserted. Capsule oblong, 8-10 (-12) mm long, slightly exserted; carpophore 3-6 (-7) mm long, hairy. Seeds rounded-reniform, c. 1-1.2 mm long, faces plane. finely tuberculate, obtusely grooved on back, dark brown to blackish-brown.
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