Bladder Campion, or White Bottle, is a fragile-looking medium perennial; it is shiny and greyish green. The flowers are usually a pure white, occasionally pink, with five deeply cleft petals. Sepals join to form an inflated calyx, which resembles a bladder; this is purple or yellowish.
Bees are attracted to the plant, which grows in many parts of Ireland beside hedges and roadside verges, usually on lime.
The flowers open in May and can continue until August and September.
Bladder Campion grows in Britain, though not often in the north of the country, and in Europe, Asia and North America.