C. hirsuta - habitus
It's a small, annual herb, which can reach heights between 7 and 30 centimetres (2.8 to 11.8 inches) Normally, the plant consists of multiple stalks, which all grow upright from a single rosette. These stalks have a characteristic violet colour. The leaves of the rosette are pinnate with one to four leaflets per leaf and a single, terminal leaflet, which is much larger than the other ones. They have a dark-green colour.
C. hirsuta - leaves and the violet stalk
In contrast to its name, the stalk and the leaves of C. hirstua have only a few hairs on theirs surface. Sometimes, these hairs are completely absent.
C. hirsuta - leaf (look at the larger, terminal leaflet)
C. hirsuta has only a few flowers, which are located in a racemes. The pedicels of each raceme are short at first (as a result, the flowers look like umbels) but become longer later. Each flower consists of four petals and sepals. The sepals are small, elliptical and have a greenish colour. The petals are white and inverted egg-shaped. In some cases, the calxy is completely absent (s. picture). Flowering time is between March and June but also in the autumn.
C. hirsuta - flowers
The ripe fruits are the typical pods of the Brassicaceae. These pods are 12 and 25 millimetres long. They stand upright at the end of the pedicels.
C. hirsuta - pods