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Farther from the shoreline, black oaks dominate the dunes. Though the soils remain sandy, the plants that have lived and died on the dunes over thousands of years have created real soil, full of organic material. Many plants and animals can and do make their homes here.
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Black oak (Quercus velutina)
Black oaks don’t grow as huge as some other species of oaks, but the
ones on the dunes are very old. They have grown up, been burned back by
fire, and grown again many times. Fire is a normal force in the life cycle
of black oaks; the wiry trees are resilient, and grow back readily.
Prickly pear cactus (Opuntia sp.)
This cactus does well in a wide variety of habitats throughout North
America, including the dry prairies and savannas of Illinois.