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Lithodora fruticosa
Lithodora fruticosa, or the shrubby gromwell, is a small 15–60 cm high densely branched perennial shrub. Its erect young stems are covered with short white hairs, while Its older stems have peeling grey bark and are frequently gnarled and twisted. The up to 25 mm long alternate leaves have a covering of flattened hairs and as they grow older they often develop small raised nodules or tubercules particularly near their edges which are downturned. The flowers which are about 15 mm long, vary in colour from violet to an intense blue, with a long petal tube, corolla tubes hairless on outside and only sparsely bristly-haired on the outside of the corolla lobes. Flowers from March to May. The hairy calyx has 5 lobes joined only near the base. The nutlets are up to 4 mm long.
Text excerpted from the Wikipedia article Lithodora fruticosa by its contributors, under CC BY-SA 4.0; the excerpts are shared under the same licence.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.
