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Name:
Cardiospermum coloradensis (Balloon Vine)
Age: Eocene
Formation: Green River Formation
Location: Bonanza, Utah
Size: Leaf is 2.75 inches long
This is an excellent specimen of Cardiospermum coloradensis, Balloon Vine, from the Green River Formation of Utah. Living members of Cardiospermum are herbaceous or woody vines. The fossil species appear to represent shrubs rather than vines. This leaf is quite large for the type and exhibits very good detail. The distinctly lobed leaf has great color and contrast and is well centered on the natural plate of shale that also contains another partial leaf of a different type. This is a very displayable specimen of this strange-looking leaf from the Eocene.
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