[Wikipedia] Description, Subspecies: Silene scouleri is a perennial herb producing one or more erect stems from a woody, branching caudex. The stem is usually unbranched, or simple, giving the plant its common name. The inflorescence may have few or many flowers in a dense or open cluster. Each flower has a tubular or bell-shaped calyx of fused sepals which has stark purple or green veins. The petals are white, sometimes with a greenish or pinkish tinge, or solid pink. They may have two to four lobes which are wide or narrow, rounded or pointed. Subspecies: Silene scouleri ssp. hallii Silene scouleri ssp. pringlei Silene scouleri ssp. scouleri (link added by Mary Ann Machi)