Stems 0.3–1.2 m; herbage harshly stellate-hairy. Leaf blades shallowly and crenately 3-lobed or deeply 3- or 5-lobed with terminal lobe narrowly oblong and toothed apically, 1.5–8 cm wide, lobes triangular, base cuneate to truncate, margins irregularly serrate, sinuses narrow. Inflorescences solitary flowers or few-flowered clusters; involucellar bractlets linear to subulate, 5–8 × 1 mm, ca. 1/2 – 2/3 calyx length. Flowers: calyx 9–12 mm, lobes broadly ovate, 4–6 × 4–6 mm, ± as wide as long, ± equaling tube; petals rose-purple, 1.5–3 cm. Schizocarps depressed-globose, 10–15 mm diam.; mericarps ca. 10–12, 8–10 mm. Seeds 3 or 4, dark brown, 2 mm, finely stellate-puberulent.
Phenology: Flowering Jun–Aug.
Habitat: Juniper woodlands, lava beds, conifer forests, chaparral, mountain slopes, rangeland, sometimes disturbed areas
Elevation: 1000–2500 m
Iliamna bakeri is found in Modoc, Shasta, and Siskiyou counties in California, and Klamath County in Oregon.