Isotoma axillaris Lindl.

Corolla pale blue; the tube 2–3 cm long. Leaves deeply pinnate-lobed, narrow-oblong to narrow-elliptic in outline, 4–6.5 cm long. Capsule ellipsoid, c. 8 mm diam., on peduncles up to 13 cm long. Acrid, tufted herbs up to 50 cm high. Widespread. Stony sites. Fl. spring–autumn