The grey-green leaves of chylismia walkeri
are quiet distinctive; they grow mostly at the base, forming a flat rosette, and are generally divided into a dozen or more pairs of irregularly shaped lateral lobes (up to one inch long) and a much larger terminal lobe. Leaf surfaces have a mottled appearance, flecked with purple or darker green. The branched stems have a covering of spreading hairs.
Pedicels are drooping when in bud, erect in flower. The green sepals are hairy, purple along the margin, reflexed and not fused when mature. The four obovate petals are colored dull yellow, and do not overlap when fully open. Petals are at most a quarter of an inch long. Fruits are narrow cylindrical pods, straight or slightly curved, up to 1.8 inches long, spreading or ascending, on stalks of up to 1 inch.