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Lamiaceae

 9-Physostegia flower l.s.

[FMP-field: image]
A flower of Physostegia virginiana in longitudinal section (the flower has been cut in half and the two halves opened up). Note the position of the 2-forked style relative to the anthers. The didynamous stamens are epipetalous.
Photo by K. R. Robertson and D. L. Nickrent from plants at Bonnie's Prairie Nature Preserve, Iroquois County, Illinois.
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