Fruitbodies are up to 2 mm across and cup-shaped to disc-shaped. The outer surface is covered with stiff, bright-yellow hairs. This sac fungus is widespread but often overlooked because of its small size. It fruits on the dead stems of herbaceous plants. In dry periods the hairy outer surface folds over to protect the disc and in wet weather it opens up to expose the hymenium. This ensures that the spores are dispersed during moist conditions.