Antennaria margaritacea is a perennial plant, with a simple, erect stem, corymbosely branched above. The leaves are linear-lanceolate, acute, 3-veined, sessile, and beneath the stem woolly; the corymbs are many-flowered and fastigiate; the scales of the hemispheric involucre are elliptic, obtuse, opaque, pearl-white, the outer ones only tomentose at the base; beads dioecious; the pistillate flowers are very slender; pappus simple, bristly, capillary in the fertile flowers, and in the sterile club-shaped, or barbellate at the summit. The corolla is yellowish