THE DUNES AND THEIR PLANTS 



139 



FIG. 136. Leaves and acorns of the oaks: a, red oak (Quercus rubrd); 6, 

 pin or swamp oak (Q. palustris); c, northern pin oak (Q. ellipsoidalis); d, scarlet oak 

 (Q. cocdnea); e, black oak (Q. velutina); f, white oak (Q. alba); g, bur oak 

 (Q. macrocarpa); h, blackjack (Q. marylandica); i, swamp white oak (Q. bicolor); 

 j, cinquapin oak (Q. MuhLenbcrgii); k, shingle oak (Q. imbricaria); I, basket oak 

 (Q. Michauxii). 



