Compact chickensage, Charleston tansy

Tanacetum compactum H. M. Hall, Muhlenbergia 2: 343. 1916

Perennials, 1–3+ cm (cespitose; caudices woody). Stems erect, sericeous. Leaves mostly basal; blades (10–25 mm) pinnati-palmately lobed (lobes 3–6+, ± oblanceolate to linear) or linear, faces sericeous. Heads borne singly or 2–3(–5) in corymbiform arrays. Involucres 4–6.5 mm. Phyllaries (14–)18–20, sericeous. ( Disc corollas: tubes glandular, lobes villous). Cypselae 1.5–2 mm (2–3-ribbed, glabrous; pappi of 3–5 subulate scales ca. 0.4 mm).

Flowering Jul–Sep. Rocky ledges and slopes; of conservation concern; 2700–3500 m; Nev.

Sphaeromeria compacta grows in the Charleston Mountains, Clark County.