Shrubs, 5-10 cm, slightly aromatic; not root-sprouting (caudices coarsely woody, branched). Stems pale to light brown (stiffly erect, densely clothed with appressed foliage), sparsely tomentose. Leaves persistent (sessile, rigid), bright green; blades oblong to ovate, 0.3-0.5 × 0.2-0.3 cm, pinnately lobed (nearly to midribs, ¹/3+ widths of blades, lobes 3-7, divergent), faces glabrous or sparsely tomentose, resinous. Heads (sessile, erect) in paniculiform to racemiform arrays (1-)2-3 × 0.5-1 cm. Involucres narrowly turbinate, 2-3 × 3-4 mm. Phyllaries (green) narrowly lanceolate (midribs prominent), glabrous or sparsely tomentose. Florets 2-6; corollas 2.5-3 mm, glandular (style branches flat, erose, exsert). Cypselae (prismatic) 0.4-0.5 mm, glabrous, resinous. 2n = 18.

Flowering mid summer-fall. Fine-textured soils of gypsum or shale; 1500-1800 m; Ariz., Colo., Nev., N.Mex., Utah.

Artemisia pygmaea is a distinctive, faintly aromatic shrublet, often mistaken for something other than a sagebrush. In early spring its stiff, bright green, deeply pinnatifid leaves are reminiscent of some prickly member of Polemoniaceae. After flowering, its heads and narrow panicles easily identify it as a member of Artemisia; it is unlike other members of the subgenus (which typically have 3-lobed leaves in fascicled lateral shoots). The molecular analysis by L. E. Watson et al. (2002) supported its phylogenetic alignment within subg. Tridentatae.