19/05/2026
One of our favourite cacti of the Mexico trip was this golden-yellow spined Acharagma roseanum, which, after a few attempts of unsuccessful searching on previous trips, seemed to be a bit of a unicorn plant in habitat.
This species and all other Acharagma like slightly cooler and humid microclimate niches in habitat compared to many other cacti, which is why they are usually found at higher altitudes in the Sierra Madre Oriental, or on north west facing slopes in the Chihuahuan Desert that get more shade and therefore hold onto humidity for longer after rain.
These types of north facing niches in northern hemisphere deserts are often where lichens, ferns and other more mesophytic life can be found 🏜️