Eriodictyon tomentosum is a shrub reaching a maximum height of one to three meters. Its twigs and foliage are covered in a dense coat of white woolly hairs, giving the bush a silvery look. The leaves are oval and up to ten centimeters long and five wide, and they may have small teeth along the edges. The bush flowers in dense fuzzy bunches of very lightlavender glandular blossoms, each a few millimeters long. The fruit is a tiny capsule less than three millimeters wide, containing about 10 minuteseeds.