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This is a dainty plant that produces abundant small flowers if it receives some sunlight. Long-Leaved Bluets is smaller in size than Houstonia purpurea (Broad-Leaved Bluets), but larger in size than several other bluets, including Houstonia caerulea (Quaker Ladies) and Houstonia pusilla (Small Bluets). Long-Leaved Bluets is very similar in appearance to Houstonia canadensis (Canada Bluets); some authorities consider the latter species to be a variety of the former, or Houstonia longifolia ciliata. Canada Bluets is supposed to have more persistent basal leaves with ciliate margins, flowering stems that are fewer in number and less branched, and slightly longer corolla lobes. Because the ranges of these two species overlap and they may intergrade, it is not always possible to reliably assign field specimens to one species or another. A scientific synonym of Long-Leaved Bluets is Hedyotis longifolia.

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© John Hilty

Source: Illinois Wildflowers

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