Mediterranean spurge

It has many medium to tall unbranched stems with long narrow leaves, clothed densely in short hair (tomentose), and dark (ssp characias) or yellow (ssp wulfenii) floral nectar glands within the yellow cup-like cyathia, which are borne in large dense spherical to oblong clusters, from spring to early summer. The fruits are smooth densely-hairy capsules. It is a tough plant, capable of resisting long periods of drought. It grows preferably in dry areas, often far away from the water table, both in flat as well as in mountainous terrain. This plant can also resist high salinity. Similar species include E. kotschyana (leaf uppersides shiny) and E. thompsonii (leaves hairy but upper leaves unexpectedly very short).

This plant also has uses in traditional medicine; like many other species of genus Euphorbia its toxic white and sticky sap has been used to treat skin excrescences, like cancers, tumors, and warts, since ancient times.

Euphorbia characias is valued as an ornamental plant for its ability to survive drought and its groundcovering capabilities. It is suitable for any location, sheltered or exposed, in light soil in full sun. It is fully hardy down to −10 °C (14 °F).

Cultivars. Garden cultivars are sold under the names ‘Black Pearl’, ‘Thelma's Giant’, ‘Lambrook Gold’, ‘Silver Swan’ and ‘Tasmanian Tiger’, among others. They come in a variety of colors, from silvery grey and bluish green to greenish yellow. These garden varieties are valued in Mediterranean or desert landscaping for not being highly demanding and for looking good despite lack of watering in sunny areas. The following cultivars have gained the Royal Horticultural Society's Award of Garden Merit:-