Geranium sanguineum, common names bloody crane's-bill or bloody geranium, is a species of hardy flowering herbaceous perennial plant in the cranesbill family Geraniaceae. It is also the county flower of Northumberland.
The genus name is derived from the Greek γέρανος ("géranos"), meaning crane, with reference to the appearance of the fruit capsule. The specific Latin name sanguineum refers to the red color assumed by the leaves in Autumn.
The biological form of Geranium sanguineum is hemicryptophyte, as its overwintering buds are situated just below the soil surface and the floral axis is more or less erect with a few leaves. It has a thick rhizome. The stems are prostrate to ascending, well developed, very branched and hairy. This plant reaches on average 30–50 centimetres (12–20 in) in height. The petiolate leaves have five lobes (or segments), each segment is tripartite in large teeth. The flowers have a diameter of 2.5 to 4 cm. and are purple The flowering period extends from May through October. The flowers are hermaphrodite and pollinated by insects (entomophily). The most common flower visitors are Syrphidae and Hymenoptera, but also butterflies and Coleoptera. The fruit is a schizocarp that breaks up into five mericarps when ripe.
The typical habitat of this species is grassland, sand dunes and open woodland on calcareous soils, including rocky slopes. It prefers calcareous soils with neutral pH, with low nutritional value, at an altitude of 0–1,200 metres (0–3,937 ft) above sea level.
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- "RHS Plant Selector - Geranium sanguineum 'Album'". Retrieved 15 July 2013.
- "RHS Plant Selector - Geranium sanguineum 'Ankum's Pride'". Retrieved 15 July 2013.
- "RHS Plantfinder - Geranium sanguineum 'Aviemore'". Retrieved 27 February 2018.
- "RHS Plantfinder - Geranium sanguineum 'Little Bead'". Retrieved 27 February 2018.
- "RHS Plant Selector - Geranium sanguineum 'Shepherd's warning'". Retrieved 15 July 2013.
- "RHS Plant Selector - Geranium sanguineum var. striatum". Retrieved 15 July 2013.
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