Sitting in an exposed site within the rock garden are plants of Alyssoides utriculata. This short lived woody perennial has seed capsules that resemble bladders. It is found in central Europe, growing on cliffs through the Alps and the Balkan ranges. With the onset of winter the delicate cellulose structure disintegrates, leaving the lignin outline to reflect in the sun. When flowers are at a premium it is unusual features such as these that catch the attention within a garden.