Arenaria spp.
Family: Caryophyllaceae
Arenaria image
Max Licher  
Plants annual or perennial, sometimes densely matted. Taproots filiform to moderately thickened; rhizomes slender. Stems prostrate to ascending or erect, simple or branched, terete to ellipsoid, angular or grooved. Leaves mostly connate, mostly sessile, not congested at or near base of flowering stem; blade 1- or 3-5-veined, rarely linear or linear-lanceolate to usually elliptic to ovate or rarely orbiculate, sometimes subsucculent or succulent, apex blunt or obtuse to acute, acuminate, or apiculate. Inflorescences terminal or axillary open cymes, or flowers solitary; bracts paired, smaller, foliaceous. Pedicels erect or ascending to reflexed in fruit. Flowers: perianth and androecium hypogynous; sepals 5, distinct or barely connate proximally, green or rarely distally purple, lanceolate to broadly ovate, 2-5 mm, margins foliaceous or white and scarious, apex obtuse to rounded or acute to acuminate, not hooded; petals 5 or absent, white, not clawed, blade apex entire; nectaries at base of filaments opposite sepals; stamens 10 (ca. 8 in A. livermorensis), arising from base of ovary; filaments distinct; staminodes absent; styles 3, filiform, 0.5-2 mm, glabrous proximally; stigmas 3, linear along adaxial surfaces of styles, papillate (30×). Capsules broadly ellipsoid or ovoid to cylindric, opening by 6 ascending to recurved teeth; carpophore absent. Seeds [1-]5-35, brown to dark brown or black, reniform or suborbicular, laterally compressed or not, shiny or dull, smooth, rugulose, or tuberculate, marginal wing absent, appendage absent. x = [7, 8-] 10, 11.
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Image of Arenaria benthamii
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Arenaria

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Image of Arenaria californica
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Image of Arenaria chamissonis
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Image of Arenaria cumberlandensis
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Arenaria
Image of Arenaria diffusa
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Image of Arenaria formosa
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Image of Arenaria glabra
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Image of Arenaria godfreyi
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Image of Arenaria groenlandica
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Image of Arenaria howellii
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Image of Arenaria humifusa
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Image of Arenaria litorea
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Image of Arenaria longipedunculata
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Arenaria
Image of Arenaria macra
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Image of Arenaria macrocarpa
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Image of Arenaria marcescens
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Image of Arenaria muriculata
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Image of Arenaria norvegica
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Image of Arenaria obtusa
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Arenaria
Image of Arenaria palustris
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Image of Arenaria physodes
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Image of Arenaria polycaulos
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Image of Arenaria procera
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Image of Arenaria pseudofrigida
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Image of Arenaria pungens
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Image of Arenaria rossii
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Image of Arenaria stenophylla
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Image of Arenaria tetraquetra
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Image of Arenaria tweedyi
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Image of Arenaria uliginosa
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Arenaria
Image of Arenaria verna
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Image of Eremogone franklinii
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Image of Eremogone stenomeres
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