|Adventurous trail walkers||Mammillaria grahamii|
The South Loop is also home to many of the Park’s more than 300 native night-blooming cereus (Peniocereus greggii). The cereus is a spindly plant that more closely resembles a cluster of dead sticks or creosote branches than a typical cactus. But for one night each summer, the “Queen of the Night” makes her appearance and the plants flower in a spectacular fashion with large, white, fragrant blossoms. This flowering event occurs typically in June or July. The Park stays open late, inviting visitors to stroll luminaria-lit paths and experience one of the desert’s miracles.