Lupinus croceus is a species of lupine known by the common name saffron-flowered lupine. It is endemic to the northernmost mountains of California, including the Klamath Mountains, where it grows in generally dry, rocky habitat. This is an erect perennial herb growing 40–60 centimetres (16–24 in) tall. The hairy palmate leaves are made up of 5 to 9 leaflets each up to 6 centimetres (2.4 in) long. The inflorescence is a raceme of many flowers, sometimes arranged in whorls. Each flower is just over a centimeter long and bright yellow to orange in color. The fruit is a hairy legume pod up to 3.5 centimetres (1.4 in) long.