Plants with caudex multi-stemmed, ultimate slender stems covered by persistent petiolar remains, terminating in rosettes; sparsely to densely pubescent. Stems 1–4 cm (leafless). Basal leaves tufted; petiole persistent becoming stramineous, 0.5–1 cm; blades narrowly oblanceolate to broadly linear, 0.5–1.8 cm × 1–2 mm, base attenuate, margins entire, apex obtuse. Fruiting pedicels 4–15 mm, pilose. Flowers: sepals purple, 4–5 × 1.5–2 mm; petals 4.5–6 × 1.7–2.3 mm; filaments 3.5–4.5 mm; anthers 0.5–0.7 mm; gynophore obsolete or to 1 mm. Fruits 1.5–3 cm × 5–9 mm; valves purplish, often glaucous, base obtuse, apex acute to acuminate; style 1–2 mm. Seeds brown, 2–3 × 1.2–1.5 mm. 2n = 14.
Phenology: Flowering Jun–Jul.
Habitat: Rock slides of metamorphics, whitish ash, subalpine and alpine ridges, rock and talus slides, disintegrated volcanic rock
Elevation: 1600-4000 m
Calif., Idaho, Nev.
Anelsonia eurycarpa has been collected from multiple counties in California; in Nevada it is known only from Washoe County and in Idaho only from Blaine and Custer counties.