Corrig. 1927 ,.
Stems branched proximal to middle, slender. Leaves largest along middle of stems; petiole distinct, 1–6 mm; blade 3–20 mm. Pedicels filiform. Flowers: sepals erect, triangular, apex acute; petals elliptic to obovate, 3–6 mm, much longer than sepals. Capsules 2–5 mm. 2n = 16.
Phenology: Flowering spring–summer.
Habitat: Wet, shaded cliffs and ledges, sometimes coastal or near waterfalls, mossy mats, wet rocks, moist crevices
Elevation: 0-1200 m
Calif., Oreg., Wash.
Cascadia nuttallii is found from the coastal mountains to the western slopes of the Cascade Range, from extreme northwestern California to southwestern Washington. The accepted species name was validated in a correction slip attached to reprints of Johnson’s article describing Cascadia.