DescriptionPteroheterochrosperma horseflyensis SRIC SR 19-006-005 img1.jpg
English: A 1 millimetre (0.039 in) wide Pteroheterochrosperma horseflyensis seed. The botanic affinity of these seeds is unknown, but a possible relationship near Boechera in Brassicaceae has been tentatively suggested.
Eocene, Ypresian, 51-49 million years old; "Boot Hill site", Klondike Mountain Formation, Republic, Ferry County, Washington, USA
Stonerose Interpretive Center Collection SRIC #SR 19-006-005
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