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Scrophulariaceae

 6-Flower in longitudinal section

[FMP-field: image]
In this longitudinal section of a flower of pale beardstongue, Penstemon pallidus, note the didynamous stamens (2 of the 4 stamens are shown), the bilabiate corolla, the superior ovary (which does NOT have a gynobasic style), the 2-lobed stigma, and the 5th sterile stamen, the staminodium.
Photo by K. R. Robertson and D. L. Nickrent from plants at Braidwood Dunes and Savanna Nature Preserve, Will County, Illinois.
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