Lepidium papilliferum

Lepidium papilliferum is a rare species of flowering plant in the mustard family known by the common names Idaho pepperweed and slickspot peppergrass. It is endemic to Idaho in the United States, where it is mostly limited to a specific habitat type in the southwestern part of the state. It was federally listed as a threatened species in 2009. This is an herb growing just a few centimeters to over 20 centimeters tall, and known to approach 40 centimeters. The leaves are divided into many subdivided lobes, the largest blades measuring 4 centimeters in length. The inflorescence is a raceme of many white flowers. The fruit is a rounded, flattened, winged silique up to 3 or 4 millimeters long by 3 to 4 wide. There is an annual form and a biennial form of the plant, the annual form completing its life cycle in one year and the biennial not producing flowers or seed until its second year. This plant grows in the sagebrush steppe ecosystem, where it can be found in microsites called slick spo......read more on Wikipedia.