Ivesia shockleyi var. ostleri
Syst. Bot. 14: 237, fig. 3. 1989.
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.
Phenology: Flowering spring–early summer.
Habitat: Crevices of quartzite outcrops, in pinyon-juniper and ponderosa pine woodlands
Elevation: 1900–2500 m
Of conservation concern.
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.
"dm" is not declared as a valid unit of measurement for this property.