Jack Dykinga / Caltrops summer poppies (Kallstroemia grandiflora) blooming amid mesquite trees (Prosopis sp.) infront of the Santa Catalina Mountains. July, after summer monsoon rains. Catalina State Park, near Tucs...

Jack Dykinga / Arizona poppies (Kallstroemia grandiflora) blooming amongst Mesquite (Prosopsis sp) trees with Santa Catalina mountains in background. Post summer monsoon rain, evening light. Sonoran Desert, Catalina...

Jack Dykinga / Arizona poppy (Kallstroemia grandiflora) blooming amongst Mesquite (Prosopsis sp) trees with Santa Catalina mountains in background. Post summer monsoon rains, evening light. Sonoran Desert, Catalina...

Gabriel Rojo / Calden tree (Prosopis caldenia) at sunset, pampas landscape, La Pampa, Patagonia, Argentina

Jouan Rius / Bird of paradise bush (Caesalpinia gilliesi) flower, Arizona, USA, April.

Gabriel Rojo / Calden forest (Prosopis caldenia) La Pampa, Argentina

Gabriel Rojo / Calden forest (Prosopis caldenia) La Pampa, Argentina

Gabriel Rojo / Calden tree (Prosopis caldenia) on Pampas plain at dusk, La Pampa, Argentina

Gabriel Rojo / Pampas grassland in flower with Calden tree (Prosopis caldenia) in distance, La Pampa, Argentina

Cyril Ruoso / Huarango (Prosopis limensis) growing in temporary river, being cut for charcoal, this long living species is under threat. San Fernando reserve in Nazca desert, Peru 2013

Cyril Ruoso / Huarango (Prosopis limensis) growing in temporary river, being cut for charcoal, this long living species is under threat and this is one of the very last forests left. San Fernando reserve in Nazca d...

Cyril Ruoso / Huarango (Prosopis limensis) chopped down for charcoal, this long living species is under threat, San Fernando reserve, Nazca desert, Peru 2013