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ophis: capitate sedge
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ophis: perigynia flat, spreading
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ophis: spikes androgynous, with a few male flowers clustered at summits
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ophis: female scales shorter than perigynia, with hyaline margins and green setaceous tips
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ophis: perigyna ovate, beaked, nerveless but prone to wrinkling
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ophis: sheaths hyaline
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ophis: rhizomes covered with fibrillose remnants of old sheaths
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ophis: fertile stems much exceeding leaves