Herbs, annual. Taproots stout. Stems simple or branched, terete. Leaves connate proximally into sheath, sessile; blade 1-veined or obscurely 3-veined, linear to narrowly lanceolate, apex acute. Inflorescences terminal, lax cymes or of solitary, mostly axillary flowers; bracts, when present, paired, foliaceous; involucel bracteoles absent. Pedicels erect. Flowers bisexual or rarely unisexual and pistillate; sepals connate proximally into tube, 25-62 mm; tube green, 10-veined, cylindric to ovoid, terete, commissures between sepals 1-veined, herbaceous; lobes green, 1-veined, linear-lanceolate, [shorter or] longer than tube, often equaling or longer than petals, margins green, herbaceous, apex acute; petals 5, purplish red or white, clawed, auricles absent, coronal appendages absent, blade apex obtuse, entire or briefly emarginate; nectaries near bases of filaments opposite sepals; stamens 10, 5 adnate to petals, 5 at base of gynoecium; filaments distinct; staminodes absent; styles (4-)5, clavate, 10-12 mm, with dense, stiffly ascending hairs proximally; stigmas (4-)5, subterminal, papillate (30×). Capsules ovoid, opening by (4-)5 ascending teeth; carpophore absent. Seeds ca. 30-60, black, reniform, laterally compressed, tuberculate, marginal wing absent, appendage absent; embryo peripheral, curved. x = 12.
Herbs annual. Stems erect. Leaves narrowly lanceolate to linear. Flowers in few flowered, lax dichasia. Calyx tube ovate or elliptic-ovate, with 10 longitudinal, raised veins; teeth 5, leaflike, linear, usually longer than tube. Androgynophore absent. Petals 5; limb usually shorter than calyx teeth, emarginate, gradually turning to claw; coronal scales absent. Stamens 10. Ovary 1-locular; styles 5, hairy, alternating with calyx lobes. Capsule ovoid, septicidally dehiscing by 5 teeth. Seeds numerous.
Firbank, L. G. 1988. Biological flora of the British Isles. 165. Agrostemma githago L. (Lychnis githago (L.) Scop.). J. Ecol. 76: 1232-1246. Hammer, K., P. Hanelt, and H. Knupffer. 1982. Vorarbeiten zur monographischen Darstellung von Wildpflanzensortimenten: Agrostemma L. (Studies towards a monographic treatment of wild plant collections: Agrostemma L.) Kulturpflanze 30: 45-96.
|[Greek agros, field, and stemma, crown or wreath, alluding to the flowers' use in garlands]|