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Agrostemma
Family:
Caryophyllaceae
Flora of North America
Resources
John W. Thieret in Flora of North America (vol. 5)
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.
Species within checklist:
ASU Campus
Agrostemma brachyloba
Images
not available
Agrostemma coronaria
Images
not available
Agrostemma githago
Agrostemma gracilis
Images
not available