Leptosiphon montanus (syn. Linanthus montanus) is a species of flowering plant in the phlox family known by the common name mustang clover. It is endemic to California. It grows in dry openings of oak woodland habitats in the western Sierra Nevada foothills, from 300-1,700 metres (980-5,580 ft) in elevation. Leptosiphon montanus is an annual herb producing a thin, hairy stem up to 60 centimeters tall. The leaves are divided into needle-like linear lobes each 2 or 3 centimeters in length. The inflorescence is a head of small but showy flowers. Each flower has a long, hairy, dark red tube up to 3 centimeters long spreading into a flat corolla. The corolla lobes are white or light to deep pink marked with reddish spots at the yellow and white throat. Its bloom period is from April to July.