Description: perennial up to 25 cm tall. The basal leaves are round and the stem leaves are much smaller. The flowers grow perpendicular to the stem axis. They are up to 7 mm long. All flowers are collected in the upper part of the stem in a cluster and elongated. The petals are pale yellowish-yellow. The fruit is a capsule with tiny seeds.

Flowering time: April-June

Habitat: Rocky habitats, rock crevices

Interesting fact: a popular species in horticulture, they need shade for growth but not a harsh climate.