Stanleya viridiflora is a species of flowering plant in the mustard family known by the common names
green princesplume and
green-flowered prince's plume. It is native to the western United States, where it occurs in sagebrush and plateau habitat, often on rocky calcareous, sandstone, clay, shale, or volcanic soils. It is a perennial herb producing a stout erect stem which may exceed a meter in maximum height. It is hairless and sometimes waxy in texture. Its...
(Wikipedia)