Purple Gromwell, modra biserka

Lithospermum purpurocaerula is a bushy plant that reaches on average 20–60 centimetres of height, with a maximum of 70 centimetres. The stem is hairy, erect and unbranched. Leaves are dark green and lanceolate to narrow elliptic. Flowers are hermaphroditic, funnel-shaped, 15–20 millimetres long and 10–15 millimetres of diameter, clustered in a racemose inflorescence. The blossoms are purple-reddish, then the color of the flowers turns into a deep blue. The flowering period extends from April to June. The fruits are bright white capsules, 4–5 millimetres long, with a glossy surface.