Calycadenia pauciflora
 Calycadenia pauciflora is a species of flowering plant in the daisy family known by the common name smallflower western rosinweed. It is endemic to northern California where it grows in the Coast Ranges north of the San Francisco Bay Area. This is an annual herb producing a slender crooked branching stem coated with hairs growing up to half a meter tall. The leaves are linear in shape and up to 5 centimeters long.