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Key to Carex, [26j] Section 7 Ammoglochin: section Ammoglochin (Arenariae)

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1 Perigynia thin-margined and prominently winged at base of beak; pistillate scales usually longer than perigynia; terminal spike usually staminate; [exotic in maritime situations]
1 Perigynia thin-margined, lacking a prominent, expanded wing; pistillate scales shorter than to nearly equaling the perigynia; terminal spike usually pistillate or androgynous; native, inland]
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