Plagiobothrys bracteatus is a species of flowering known by the common name bracted popcornflower.
It is an annual herb with a mostly upright stem 10 to 40 centimeters in length.
The leaves are located along the stem, the lowest, largest ones measuring up to 10 centimeters long. The plant is coated in sparse rough hairs.
The inflorescence is a series of tiny flowers, the lower ones accompanied by leaflike bracts. Each five-lobed white corolla measures 1 to 3 millimeters wide.
The fruit is a narrow, cross-ribbed, tubercled nutlet no more than 2 millimeters long.