Plagiobothrys collinus is a species of flowering plant in the borage family known by the common name Cooper's popcornflower. It is native to California, Arizona, and parts of northern Mexico, where it can be found in many types of habitat. I
Plagiobothrys collinus is an annual herb with a spreading or erect stem 10 to 40 centimeters in length. The leaves along the stem are 1 to 4 centimeters long, the lower ones oppositely arranged and the upper ones alternate. The herbage is coated in fine and rough hairs. The inflorescence is a long, widely spaced series of tiny flowers, each with a five-lobed white corolla no more than 7 millimeters wide, sometimes as small as one millimeter. The fruit is a minute nutlet with angular cross-ribs visible in magnification.
This species is divided into varieties which can sometimes be hard to distinguish from each other.
- Jepson Manual Treatment: Plagiobothrys collinus
- USDA Plants Profile
- Plagiobothrys collinus Photo gallery
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