Plate 3. Quercus macrocarpa - bur oak (original caption: mossy cup oak. Quercus olivæformis. ) leaves of the natural size. Fig. 1, an acorn with the cup. Fig. 2, an acorn without the cup. Date: 1819.
Author: François André Michaux, Augustus Lucas Hillhouse (translator), Pierre Joseph Redouté (artist), Renard (engraver)Source: https://commons.wikimedia.org/
