Watercress
Nasturtium oficinale
Perennial Rockcress
Arabis perennans
Succulent, low-growing annual in shallow waters of riparian streams. Small, four-petaled flowers. Long established in wild from cultivation. Detailed Description
From a woody base new foliage and flowers regrow each year. Stems tall with small purple flowers. High on rocky slopes and more common at elevations above the Sonoran Desert. Detailed Description
Coulter's Lyre Pod
Lyrocarpa coulteri
Western Wallflower
Erysimum capitatum
Obscure, viney plant that scrambles up through shrubs. Perennial, but above ground portions regrow each spring, precipitation permitting. Petals are brownish. Southern portions of Sonoran Desert, e.g. Organ Pipe NM. Detailed Description
Tall herbaceous plant often above one meter tall with a cluster of orange or yellow flowers at top of spike. Upper Sonoran Desert only above 1000 m elevation. Detailed Description
Lyreleaf Jewelflower
Twist Flower
Streptanthus carinatus
The slender flowers have petal ends rolled down exposing darker, purplish inner surface; partly flattened pods with many seeds. Frequent in spring Tucson area. Detailed Description
