ERYSIMUM. Wallflower. Widespread in temperate regions. Showy perennials and subshrubs of the mustard family, varying widely in habit. They have narrow, usually toothed leaves and fragrant four-petalled blossoms painted white to yellow, orange, red or purple. Sun, reasonably well drained soil, moderate to little watering when established. Hardiness varies.

hieraciifolium (previously listed as E. asperum). Siberian wallflower. There is rampant confusion about the correct identity of this plant, and even the latest designation is dubious. However, it remains as beautiful as ever. It grows erect, with closely branched trunks, to 1-2’. The leaves are quite narrow and toothed. Masses of bright orange flowers grace the plant in spring and summer. Shearing off spent flower stems will promote further waves of bloom. 0^oF or below.

pulchellum. A broad (2' or more), dense mat with lush, very narrow leaves. It is one of the earliest perennials to bloom in spring, with 6-8" stems of delightfully fragrant orange flowers. 0^oF or below.