The leaves of hieracium scouleri
are lance-shaped, have a covering of long hairs, and occur both around the base and at widely spaced intervals along the stem, where they are greatly reduced in size. Stems are erect, have a light hair covering and branch towards the top.
The inflorescence is an open cluster of between 10 and 25 flowerheads. The flowerheads consist of 15 to 45 yellow ray petals (with notches at the outer edge) and a smaller number of long yellow stamens, split at the tip. Phyllaries are light to dark green in color, hairy, glandular, and do not point outwards, except at the top, right beneath the florets. The similar slender hawkweed (hieracium gracile) is unbranched and has basal leaves only. Scouler's hawkweed inhabits meadows and sunny clearings in forests, at elevations between 1,500 and 9,800 feet.