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Geocarpon
Family:
Caryophyllaceae
FNA
Resources
Mark A. Nienaber in Flora of North America (vol. 5)
Herbs,
annual or winter annual.
Taproots
slender.
Stems
erect or spreading-ascending, simple or few-branched basally, terete.
Leaves
connate basally into sheath, sessile; blade 1-veined, narrowly oblong, not succulent, apex acute.
Inflorescences
axillary, flowers borne singly at alternate nodes; bracts paired at upper nodes, foliaceous.
Pedicels:
flowers sessile.
Flowers:
perianth and androecium perigynous; hypanthium green or reddish, cup-shaped, 10-veined, commisural veins branched ca. at base of sepals; sepals 5, connate proximally ca. 1 mm, green or reddish, 3-veined (lateral pair 1/8 length of midvein), triangular-ovate, margins white, scarious, apex acute; petals absent; nectaries unknown; stamens 5, arising between sepals; filaments distinct; staminodes 5, alternating with stamens, scalelike; styles 3, filiform, ca. 0.3 mm, without stiff hairs proximally; stigmas 3, linear along adaxial surface, minutely papillate (50×).
Capsules
ovoid, opening by 3 apical, spreading valves; carpophore absent.
Seeds
ca. 30(-60), yellowish green to brown, translucent, elliptic to ovoid, reniform, slightly laterally compressed, muriculate, marginal wing absent, appendage absent.
Species within inventory project:
Arizona Flora
Geocarpon carolinianum
Geocarpon glabrum
Geocarpon groenlandicum
Geocarpon minimum
Geocarpon nuttallii
Geocarpon uniflorum
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