The Cactus to Clouds ascent just outside Palm Springs, Calif., is grueling, but natural treasures, and a speedy trip down, await anyone who is up to the challenge. Cactus to Clouds, on Mount San ...

2010, Short et al., 2011). Cacti have a wide distribution in the Americas and a single epiphytic species that also reaches Africa and Asia. Apart from two poorly known species, Goettsch et al. (2015) ...