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Penstemon hallii

Known as: Penstemon hallii A.Gray 
National Institutes of Health

Papers overview

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Highly Cited
1988
Highly Cited
1988
PALEOECOLOGY OF THE MIDDLE PENNSYLVANIAN-AGE HERRIN COAL SWAMP (ILLINOIS) NEAR A CONTEMPORANEOUS RIVER SYSTEM, THE WALSHVILLE PALEOCHANNEL
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