Leptosiphon ciliatus (syn. Linanthus ciliatus) is a species of flowering plant in the phlox family known by the common name whiskerbrush.
It is native to California, Baja California (México), Nevada, and Oregon, growing below 3000m (10,000feet) in elevation.
It is a common plant in many types of habitats, including chaparral, oak woodland, grassland, yellow pine forest, red fir forest, lodgepole forest, and subalpine forest.
Leptosiphon ciliatus is a hairy annual herb producing a thin stem up to about 30 centimeters tall. The leaves are each divided into needle-like lobes up to 2 centimeters long, with leaf pairs appearing as a cluster of narrow lobes.
The tip of the stem has an inflorescence of one or more flowers each with a long, hairy tube up to 2.5 centimeters long emerging from the leaf-like sepals. The face of the flower is less than a centimeter wide and pale to bright pink with white and yellow coloring and reddish spots on the throat. The bloom period is March to July, depending on altitude and latitude.