Ocotilla - This is a really cool neutral plant that adds a vertical element and height to the garden, yard, and landscape. It does well in the heat and harsh soil. Other than when it is in bloom the Ocotillo is a grayish neutral color that goes well in most any Southwest, desert, Arizona, or New Mexico landscaping.image by JustTooLazy, via Flickr
15 Great Native Plants for Southwestern Gardens ----Autumn Sage Salvias are tough to beat just about everywhere. Autumn sage is an especially fine species that bears evergreen foliage and clusters of red, purple, pink, or violet flowers from late summer through autumn. Like most salvias, this is a favorite of butterflies and hummingbirds. Name: Salvia greggii Growing Conditions: Full sun and well-drained soil Size: To 2 feet tall Zones: 7-9
Queen’s wreath vine (Antigonon leptopus) is a rapid grower, is drought tolerant once established and thrives in exposures with full, even reflected, sun. This North American native is perfect for the dry climates of California and the desert Southwest, but its vigorous growth can cause it to become invasive in warm, humid climates where water is plentiful.