a sprawling opuntia humifusa, prickly pear cactus, filled with yellow flowers and seed pods

cacti desert house mitchell park conservatory domes milwaukee wisconsin usa united states america botanical horticulture nature plants flowers yellow blooming blooms floral leaves green tourism travel sight conservation horizontal geodesic dome greenhouse opuntia humifusa prickly pear cactus devil 039 tongue cactaceae optunia calcicola compressa texture spines pads edible sprawling filled seed pods room mictchell