Sidalcea hirsuta
Encyclopedia
Sidalcea hirsuta is a species of flowering plant in the mallow family
Malvaceae
Malvaceae, or the mallow family, is a family of flowering plants containing over 200 genera with close to 2,300 species. Judd & al. Well known members of this family include okra, jute and cacao...

 known by the common name hairy checkerbloom. It is endemic 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...

, where it grows in seasonally wet habitat throughout the central part of the state, 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. This annual herb produces a thick stem up to 80 centimeters tall, the top parts covered in bristly hairs. The leaf blades are deeply divided into narrow linear lobes and coated in bristles. 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 dense cluster of flowers with pink petals up to 2.5 centimeters long.

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