(Wallflower) These are evergreen, semiwoody plants from the Canary Isles, Madeira, and the Mediterranean region. They belong to the Mustard family, Cruciferae. Cheiranthus (Wallflowers) have vertical, branching stems, 1/2 to 3 feet high. In the spring they bear spikes of beautiful and often fragrant flowers. Though they are perennials, they are oft... Found on http://www.encyclo.co.uk/local/10004