Occasional plants with pink flowers are usually hybrids with red campion ("Silene dioica"). Commonly called narrow-leafed campion, it is a species in the genus "Silene". An infusion of the "alba" subspecies of "Silene latifolia" is used as physic. "C. pipiens" is a pollinator of "Silene otites," "Tanacetum vulgare," and "Achillea millefolium". "Silene undulata" is regarded by the Xhosa people as a sacred plant. Fifteen thousand men including the king of Silene converted to Christianity. Of these, the genera "Silene" and "Teucrium" each contain over 25 endemic species. The calyx may be cylindrically inflated, as in "Silene". In the background is a fantastic city, Silene of Libya. In the case of "Silene acaulis", growth rates have been measured at to per year. The simplest silene is (the parent molecule) is disilene, . The plant "Silene erciyesdaghensis" was discovered on Erciyes and named after it. "Silene viscaria" is also grown as an ornamental garden plant. Silene stenophylla is a species of flowering plant in the family Caryophyllaceae. The first stable (kinetically shielded) silene was reported in 1981 by Brook.