P. eornubiense: stem 1-3 feet high, erect, round, striated, minutely scabrous, bearing a few small ternate leaves, with linear-lanceolate, entire segments, the uppermost represented by a barren lanceolate-acute sheath; radical leaves triternate, the leaflets wedge-shaped, cut, or deeply three-lobed, with acute segments; flowers white, in terminal umbels. - Cornwall and Devon. Fl. August, September.