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Polygonaceae

11-Polygonum inflorescence

[FMP-field: image]

The achene fruits of Polygonum pennsylvanicum can be seen here. The achenes are black and lens-shaped, that is laterally compressed, since they came from a syncarpous gynoecium of 2 carpels.

Taken by K. R. Robertson and D. L. Nickrent of a plant cultivated at the University of Illinois.

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