Eucephalus glaucescens is a North American species of flowering plant in the family Asteraceae known by the common name Klickitat aster.

[2] It grows on rocky slopes and in subalpine meadows at high elevations on and near Mount Adams in the south-central part of the US State of Washington.

[3] Eucephalus glaucescens is a perennial herb up to 160 cm (5+1⁄3 ft) tall, with a woody caudex.

One plant will usually produce 5-60 flower heads in a large array.

Each head has 8-13 purple ray florets surrounding numerous yellow disc florets.