Lamb's skin

From LoveToKnow Garden

Lambs-skin (Arnica) - A small group of perennial herbs of the Daisy order, with clustered leaves and neat yellow flowers on long stems. They do well in the rock garden or border, in open sandy soils. Increase by division, or seed when obtainable. A. Chamissonis from N. America is a pretty plant of 1 to 2 feet, with woolly leaves and yellow flowers 2 inches across, from July to September. A. montana (Mountain Tobacco) is a European plant about 12 inches high, with smooth, lance-shaped leaves and yellow flowers 2 inches across in summer, the blooms gathered into threes and fours on hairy stems. This pretty rock plant is of slow growth, and should have a place in sandy peat and partial shade. A. foliosa, from the Rocky Mountains, is not unlike the last, but taller, with smaller flowers, and needs a damp place. A. sachalinensis from the Far East grows 18 inches high, with abundant yellow flowers.