Perennial herb forming extensive mats; stems creeping, to 5 mm diam., with short, stout, ascending, green to purple, lateral branches bearing terminal rosettes of leaves, glabrous. Leaves oblanceolate in outline, 1–30 cm long (petiole comprising ¼–½ of length), 0.5–4.5 cm wide, 3-pinnate, soft, sparsely to densely villous; primary pinnae in 8–12 subopposite pairs. Scape slender, 2–10 cm long, shorter than leaves, villous. Capitulum 7–12 mm diam.; involucral bracts ovate-triangular, green with a dark tip, villous; pistillate florets 90–260 in 3–6 rows; staminate florets about the same. Achenes cylindrical, obscurely 4-angled, 1.8–2 mm long, glabrous or sparsely glandular-papillose, golden brown.
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