Ostler’s or Wah Wah ivesia

Stems (0.2–)0.5–1.5 dm. Basal leaves (2–)4–12(–14) cm; leaflets 7–15(–18) per side, lobes (4–)6–10(–12), oblanceolate to obovate or elliptic. Cauline leaves 0.5–2.5 cm, blade reduced pinnate, lateral leaflets 1–3 per side. Inflorescences 5–20-flowered, (1–)3–4(–6) cm diam. 2n = 28.

Flowering spring–early summer. Crevices of quartzite outcrops, in pinyon-juniper and ponderosa pine woodlands; of conservation concern; 1900–2500 m; Utah.

Variety ostleri is known from the Needle Range and Wah Wah Mountains of Beaver County, Utah. A report from the Snake Range, White Pine County, Nevada (G. Clifton, unpubl.) remains to be verified.