`balloon cactus` flowers - notocactus magnificus

america arboretum ball balloon bloom blossom blue botanic botanical botany brandt brazil brazilian cactaceae cacti cactoideae cactus desert eriocactus europe european florist flowers gallen garden green magnifica magnificus may natural nature notocacteae notocactus orange parodia petals plants pollen saint south spiky spine spiny spring succulent summer swiss switzerland thorn thorny yellow