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Convolvulus arvensis (Morning glory)

Convolvulus arvensis (Morning glory), in situ (black and white)

Plant specimen (black and white), identified as number 1321

Plant, in situ (black and white)

Plant, in situ (black and white)

Viburnum trilobum (Cranberry), in situ (black and white)

Trifolium hybridum (Alsike clover), in situ (black and white)

Astragalus (Ground plum-vetch), in situ (black and white)

Plants, in situ (black and white)

Prairie section (black and white)

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