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Euphorbia stricta (upright spurge)

The upright spurge is an annual herb, widespread throughout Europe but uncommon in the UK where it is found mainly in a small area around Gloucester.

Euphorbia stricta illustration

Euphorbia stricta illustration (Image: John Sibthorp, Flora graeca, London, 1806-40)

Species information

Scientific name: 

Euphorbia stricta

Common name: 

upright spurge

Conservation status: 

Least concern.

Habitat: 

Roadsides, beside streams and ditches, in moist grassy areas, amongst rocks in limestone and sandstone areas. From sea level to 1200 m.

Key Uses: 

Ornamental.

Known hazards: 

Latex may severely irritate the skin causing acute dermatitis, and is poisonous if consumed. Contact with the eyes should be avoided. Seeds may have drastic purgative action.

Taxonomy

Subclass: 
Superorder: 
Rosanae
Order: 
Malpighiales
Family: 
Euphorbiaceae
Genus: Euphorbia

About this species

Euphorbia stricta is an annual herb with a milky latex, widespread throughout Europe but uncommon in the UK except in a small area around Gloucester. Because of this it is sometimes known as Tintern spurge. It may also be found listed under the name Euphorbia serrulata. The plant is cultivated only occasionally, but spreads rapidly.

Synonym: 

Euphorbia serrulata

Genus: 
Euphorbia

Discover more

Euphorbia stricta illustration (Image: John Sibthorp, Flora graeca, London, 1806-40)

Geography and distribution

The upright spurge is found throughout southern Europe, reaching as far north as the southern parts of UK, The Netherlands and Poland and as far east as the Caucasus. It also has become naturalised in New Zealand.

Description

Overview: Euphorbia stricta is an annual herb growing to 1 m, always glabrous. Stems are often reddish with typically four to five axillary rays in the upper part.

Leaves: Leaves are oblong-lanceolate, finely toothed and subsessile.

Flowers: Flowers are in small groups consisting of a solitary female and several males surrounded by nectar-gland bearing involucral bracts which form a cup. The male flower consists of a single naked stamen on its own pedicel (so that it looks like a jointed filament). The female flower consists of a trilocular (3-valved) naked ovary, on a pedicel which usually elongates in fruit.

Fruits: The fruit is a 3-lobed dehiscent capsule, up to 2.5 mm in diameter and is covered in cylindrical warts or tubercles. The seeds are smooth and reddish-brown.

Uses

Can be grown as an ornamental herbaceous perennial or rock garden plant.

References and credits

Huxley, A., Griffiths, M. & Levy, M. (eds) (1992). The New Royal Horticultural Society Dictionary of Gardening, 4 vols. Macmillan, London.

Govaerts, R., Radcliffe-Smith, A., Hoffmann, P., Barker, C., Carter, S., Davies,S., Esser, H.-J., Gilbert, M., Steinmann, V., van Welzen, P. & Whitmore, T. (2009). World Checklist of Malpighiales. Royal Botanic Gardens, Kew. Available online.

Linnaean Plant Name Typification Project; Natural History Museum, London. Available online.

Kew Science Editor: Gillian Challen
Kew contributors: Sustainable Uses Group

While every effort has been taken to ensure that the information contained in these pages is reliable and complete, the notes on hazards, edibility and suchlike included here are recorded information and do not constitute recommendations. No responsibility will be taken for readers’ own actions.

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