Streptanthus cordatus stem. Flowers occur at intervals along the upper stem. Each has a calyx of sepals roughly a centimeter long which begin greenish yellow and mature purple. Four purple petals emerge from the tip of each calyx. The fruit is a thin, narrow silique which may reach 14 centimeters in length or longer. Streptanthus cordatus Streptanthus cordatus is a species of flowering plant in the mustard family known by the common name heartleaf twistflower. It is native to the western United States, where it can be found in many types of sagebrush, woodland, and forest habitat. It is a perennial herb
Glandularia gooddingii Glandularia gooddingii Glandularia gooddingii is a species of flowering plant in the verbena family known by the common name southwestern mock vervain. It is native to the southwestern United States and northern Mexico, where it occurs in sandy and rocky desert habitat. It is a perennial herb producing several hairy, decumbent to erect stems up to 45 centimeters long. The hairy leaves are generally divided at the base into a few lobes, which are edged with large teeth or small lobes. The plant blooms in large, dense, head-like spikes of many flowers. Each flower has a calyx of hairy sepals