A blooming barrel cactus in Seguaro National Park

A caterpillar

Desert garden in Seguaro National Park

Teddybear cholla cactus

Seguaro in the valley of Red Hills

Desert creosote bush

Two seguaros in the foreground

A group of prickly pears

Detail of a teddybear cholla cactus

Different cactuses

Detail of prickly pears

Blooms of an unknown bush

A group of hedgehog cactuses

Detail of a barrel cactus bloom

Petroghlyphs at Apache Peak

A bloom of teddybear cactus in Seguaro National Park

An organ pipe cactus in Organ Pipe National Monument

Organ pipe fruits in Organ Pipe National Monument

A blooming seguaro cactus in Organ Pipe National Monument