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Picea critchfieldii, the Critchfield's spruce, is a species of spruce that became extinct in the Late Quaternary extinction event. It grew in much of eastern North America from 28,000 BP to 15,000 BP. It was a common tree in lower Mississippi River valley forests.
- "The Extinction of Critchfield’s Spruce (Picea critchfieldii)". Retrieved 11 June 2012.
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