About Calycadenia fremontii A.Gray
Calycadenia fremontii is a flowering plant species in the daisy family, commonly called Frémont's western rosinweed, named after John C. Frémont. This species is native to southwestern Oregon, specifically Josephine and Jackson Counties, and northern California. Most of its California populations grow north of Napa and Placer Counties, with only a few small isolated populations located in Santa Clara and Tuolumne Counties. It is a common component of local flora across multiple habitat types found in mountains, foothills, and valleys. This is an annual plant with a variable overall appearance. It grows a rigid, erect stem covered in hairs, reaching a maximum height between 10 centimeters (2 inches) and 1 meter (40 inches). Its leaves are linear in shape and arranged alternately along the stem, particularly on the lower portion of the stem. The largest leaves can grow up to 8 centimeters long. Its inflorescence holds one or more glandular flower heads. Each flower head contains 2 to 6 three-lobed ray florets, which can be white, red, or yellow in color, and up to 20 disc florets at its center. The fruit produced by this plant is an achene; achenes that develop from the disc florets may have a pappus made up of scales.
