Salix jepsonii is a species of willow known by the common name Jepson's willow. It is native to southernmost slopes of the Cascade Range and the Sierra Nevada in California, where its distribution extends just into western Nevada. It grows along rivers and streams in high mountain habitat. It is a shrub growing 1 to 3 meters tall, sometimes forming colonial thickets. The lance-shaped leaves may grow over 10 centimeters long. They are hairy when new, and have silky hairs on the undersides when mature. The inflorescence is a catkin of flowers, male catkins short and stout, measuring no more than 2 centimeters long, and female catkins reaching up to 6 centimeters in length. It is a shrub growing 1 to 3 meters tall, sometimes forming colonial thickets. The lance-shaped leaves may grow over 10 centimeters long. They are hairy when new, and have silky hairs on the undersides when mature. The inflorescence is a catkin of flowers, male catkins short and stout, measuring no more than 2 centimeters long, and female catkins reaching up to 6 centimeters in length.