Quercus lyrata

Scientific Name: Quercus lyrata
Common Name: overcup oak
Global Conservation Status: G5 - Secure

The sheath of the overcup acorn almost entirely covers the acorn, with only the tip exposed. Leaves are dark green, thin, and have pointed lobes. 
Photographer: Chris Evans, licensed under Creative Commons: Attribution-NonCommercial 3.0.

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† The conservation status of a species is designated by a number from 1 (critically imperiled) to 5 (secure), preceded by a letter reflecting the geographic scale of the assessment (G = Global, S = Subnational). More information is available through NatureServe Explorer.