Plagiobothrys acanthocarpus
Encyclopedia
Plagiobothrys acanthocarpus is a species of flowering plant in the borage family
Boraginaceae
Boraginaceae, the Borage or Forget-me-not family, include a variety of shrubs, trees, and herbs, totaling about 2,000 species in 146 genera found worldwide.A number of familiar plants belong to this family....

 known by the common name adobe popcornflower. It is native to California
California
California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...

 and northwestern sections of Mexico, where it can be found in moist areas on clay soil, such as vernal pool
Vernal pool
Vernal pools, also called vernal ponds or ephemeral pools, are temporary pools of water. They are usually devoid of fish, and thus allow the safe development of natal amphibian and insect species...

s. It is an annual herb with a spreading or erect stem 10 to 40 centimeters in length. The leaves are linear or lance-shaped to oblong and several centimeters in length. The plant is coated in rough hairs. The inflorescence
Inflorescence
An inflorescence is a group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. Strictly, it is the part of the shoot of seed plants where flowers are formed and which is accordingly modified...

is a series of tiny flowers, each with a yellow-throated, five-lobed white corolla less than 3 millimeters wide. The nutlets are covered in long prickles with some bristles between.

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