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Key to Limnophila

Plantaginaceae

Limnophila

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1 Lower leaves opposite or in whorls of 3, not divided into narrow segments
1 Lower leaves in whorls of 6-13, deeply divided into narrow segments.
  2 Flowers pedicellate, with 2 small bractlets below; cleistogamous flowers absent
  2 Flowers sessile, lacking bractlets below; cleistogamous flowers present