Spergula

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  S. arvensis

  1a. Seeds subglobose, sometimes with an equatorial keel or wing up to 0.1 mm wide; flowers with usually 10 stamens; leaf blades revolute, appearing terete in cross-section at low magnification, 15–30 (–50) mm long
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  1b. Seeds compressed, with a proment equatorial wing 0.2–0.6 mm wide; flowers with 5 or 10 stamens; leaf blades flat or weakly revolute, 3–15 (–20) mm long
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    S. pentandra

    2a. Petals lanceolate, ± acute at the apex, generally not contiguous in intact flowers; flowers with usually 5 stamens; equatorial wing of seed white to light brown, 
(0.3–) 0.4–0.6 mm wide, approximately as wide as the seed body
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    S. morisonii

    2b. Petals ovate, narrowly rounded to obtuse at the apex, generally contiguous in intact flowers; flowers with usually 10 stamens; equatorial wing of seed light brown to brown-black (rarely white), 0.2–0.3 (–0.5) mm wide, narrower than the seed body [Fig. 574]

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 Show photos of:   Each photo represents one species in this genus.