Nature celebrates the upcoming summer solstice by offering flowers for us to enjoy. One of the showiest and most unusual is the prickly pear cactus. “That’s right, there is a cactus considered to be an Ohio native, and it typically blooms around the solstice, adding beautifully showy yellow blooms to the dry, sun-baked sandy areas of Oak Openings,” said Art Weber, Metroparks nature photographer…