You will easily recognise the Common Bladder Campion by this curious calyx.
In this white Bladder Campion the stamens and the seed-vessel are found in the same flower, and you can always see the forked tip of the seed-vessel, rising among the dark green heads of the stamens.
The leaves of the Common Bladder Campion are smooth and shiny. They grow opposite each other in pairs, and wherever a pair joins the main stem, the stem is swollen like the joint of a finger.
3. SEA CAMPION
The Sea Campion grows by the seashore, by the side of mountain streams, or on wet rocks among the hills.
It blooms all summer, and although it is really a smaller plant than the Common White Campion, the flowers are larger.
These flowers have five white petals, each with a V-shaped notch in the outer edge. Half way down these petals there is a white-fringed scale. These scales stand up like a crown round the inside of the flower.
The calyx is swollen like a bladder, and is covered with fine veins, the same as in the Common Campion. Round the mouth it has five sharp teeth.
In this plant the flowers do not grow in groups of two or three. Each flower appears singly at the end of a slender stalk, and there are several pairs of small leaves a good way below the flower.