Euphorbia altissima is a clump-forming perennial spurge with an upright to spreading sub-shrub habit and narrow, often glaucous leaves. Foliage can be evergreen, semi-evergreen or deciduous, sometimes taking a red tint in autumn. It flowers from May to September and suits well-drained soils on loam, sand or chalk. The milky sap is a skin and eye irritant, so wear gloves when handling.

Tall spurge (Euphorbia altissima) is a South African perennial with glaucous leaves that flowers from May to September.

Euphorbias are grown as much for structure and acid-green colouring as for flowers. What reads as the flower is in fact a pair of showy bracts, usually lime, chartreuse or sulphur yellow, sometimes flushed orange or red, surrounding tiny true flowers at the centre. The genus is enormous and varied, taking in evergreen sub-shrubs with whorled blue-grey foliage, spreading woodlanders for dry shade, and airy herbaceous kinds that colour brilliantly in autumn. All exude a milky latex when cut.

Euphorbia altissima

Tall spurge | Euphorbia altissima

Euphorbia amygdaloides is a clump-forming perennial sub-shrub noted for narrow, often blue-grey (glaucous) leaves and tolerance of dry shade. It reaches about 0.8 metres and flowers from May to September. Suited to full sun through partial shade, the woodland forms will tolerate dry shade under trees. The plant’s milky sap is an irritant and gloves and eye protection should be used when handling.

Wood spurge (Euphorbia amygdaloides) is a clump-forming perennial to 0.8 metres for full sun to partial shade, flowering May to September.

https://en.wikipedia.org/wiki/Euphorbia_amygdaloides

Euphorbia amygdaloides

Wood spurge | Euphorbia amygdaloides

Euphorbia amygdaloides 'Brithembottom' is an evergreen perennial in the Euphorbiaceae that flowers in dry shade. It reaches about 0.8 m with dark green, slightly hairy leaves roughly 0.06 m long. Green-yellow cyathia appear from May to September. The plant spreads by underground rhizomes and is commonly used as a ground cover.

Wood Spurge (Euphorbia amygdaloides 'Brithembottom') tolerates dry shade, spreads by rhizomes and flowers May to September.

Euphorbia amygdaloides 'Brithembottom'

Wood Spurge (Euphorbia amygdaloides 'Brithembottom')

Euphorbia amygdaloides 'Purpurea' is a clump-forming perennial spurge noted for its narrow, often blue-grey leaves that can flush red in autumn. It develops as an upright or spreading sub-shrub to about 0.8 metres and produces green-yellow cyathia from May to September. The plant suits full sun to partial shade and will tolerate the dry shade beneath trees. The milky latex is an irritant, so wear gloves and eye protection when handling.

Wood Spurge 'Purpurea' (Euphorbia) is a clump-forming perennial with blue-grey foliage and green-yellow flowers from May to September.

Euphorbia amygdaloides 'Purpurea'

Wood spurge 'Purpurea' | Euphorbia amygdaloides 'Purpurea'

Euphorbia amygdaloides 'Variegata' is a clump-forming perennial spurge with narrow, often blue‑grey leaves and an upright to spreading sub‑shrub habit reaching about 0.8 metres. It produces green‑yellow cyathia from May to September. The plant tolerates full sun through partial shade and will cope with the dry shade found beneath trees. Take care when handling, as the milky sap is an irritant.

Wood Spurge (Euphorbia amygdaloides 'Variegata') is an evergreen perennial for dry shade or sunny borders, flowering May to September.

Euphorbia amygdaloides 'Variegata'

Wood Spurge | Euphorbia amygdaloides 'Variegata'

Euphorbia characias is a clump-forming, upright or spreading sub-shrub reaching about 1.2 metres. It bears narrow, often blue‑grey (glaucous) leaves that may take on red tints in autumn and can be evergreen, semi‑evergreen or deciduous. Flowering runs from May to September, producing the characteristic cup-like euphorbia blooms. It is native to the Mediterranean.

Mediterranean spurge Euphorbia characias is a clump-forming perennial to 1.2 metres with blue‑grey leaves and flowers from May to September.

https://en.wikipedia.org/wiki/Euphorbia_characias

Euphorbia characias

Mediterranean spurge | Euphorbia characias

Euphorbia characias subsp. wulfenii 'Golden Balls' is a compact, upright spurge in the Euphorbiaceae notable for its dense, spherical clusters of yellow cyathia that flower from May to September. It forms many upright stems with long, narrow leaves and rounded flower clusters. Mature plants typically reach around 1.2 m in height and spread. The seedheads are held prominently after flowering.

Mediterranean spurge Euphorbia characias subsp. wulfenii 'Golden Balls' produces yellow flower clusters from May to September and suits sunny.

Euphorbia characias subsp. wulfenii 'Golden Balls'

Mediterranean spurge 'Golden Balls' (Euphorbia)

Euphorbia characias subsp. wulfenii 'John Tomlinson' is a perennial spurge in the Euphorbiaceae that retains evergreen foliage and sets yellow cyathia from May to September. It prefers full sun and well-drained soil, tolerating chalk, clay, loam or sand and a wide pH range. The plant is rated H3–H7 (borderline to fully hardy) and suits south- or west-facing, exposed or sheltered sites. Plant it in borders, containers, gravel gardens, dry shade or hot borders.

Euphorbia characias subsp. wulfenii 'John Tomlinson' produces yellow cyathia from May to September and suits full sun in well-drained soils.

Euphorbia characias subsp. wulfenii 'John Tomlinson'

Euphorbia collorata is a species in the large spurge genus Euphorbia (family Euphorbiaceae). It belongs to a group of plants noted for their specialised euphorbia floral structures rather than conventional petals. Members of the genus display a wide range of growth forms, from tiny annuals to substantial woody plants. Euphorbia collorata flowers from May to September.

Euphorbia collorata is a species of Euphorbia in the family Euphorbiaceae and it flowers from May to September.

Euphorbia is a large and diverse genus of flowering plants, commonly called spurge, in the family Euphorbiaceae.

Euphorbia collorata

Euphorbia cyparissias is a herbaceous perennial in the Euphorbiaceae that forms a mat and spreads to 1–1.5 metres. Its foliage is deciduous and plants reach 0.1–0.5 metres high, typically filling their eventual spread in 2–5 years. It flowers from May to September. It prefers full sun on chalk, loam or sand and is drought-resistant once established.

A mat-forming herbaceous perennial (Euphorbia cyparissias) reaching 0.1–0.5 metres, flowering May to September and suited to full sun on well-drained.

https://en.wikipedia.org/wiki/Euphorbia_cyparissias

Euphorbia cyparissias

Cypress spurge | Euphorbia cyparissias

Euphorbia dulcis is a clump-forming perennial spurge with narrow, often blue-grey leaves that may become red-tinted in autumn. It grows as an upright or spreading sub-shrub and flowers from May to September. Plants suit full sun to partial shade on light to moderately fertile, well-drained soils. Take care when pruning because the milky sap can irritate skin and eyes.

Sweet spurge (Euphorbia dulcis) is a clump-forming perennial with blue-grey leaves and May–September flowers, best in well-drained sun or partial shade.

https://en.wikipedia.org/wiki/Euphorbia_dulcis

Euphorbia dulcis

Sweet spurge | Euphorbia dulcis

Euphorbia eritrea is a member of the Euphorbiaceae that can present as an herbaceous perennial, a succulent shrub or a small tree, reflecting a broad habit range. Foliage may be deciduous or evergreen depending on form and conditions. It favours full sun and well-drained soils such as chalk, sand or loam across a wide pH range. Flowers are produced from May to September.

Euphorbia eritrea prefers full sun and well-drained soils and flowers from May to September, suitable for gravel gardens and containers.

Euphorbia eritrea

Euphorbia eritrea | Full-sun succulent

A clump-forming perennial, Euphorbia griffithii 'Dixter' is an upright or spreading sub-shrub grown for its narrow, often blue-grey leaves that may take on red tones in autumn. It flowers from May to September with red and yellow blooms. Plants suit full sun to partial shade and prefer well-drained soils. Wear gloves and eye protection when handling because it can irritate skin and eyes and is harmful if eaten.

Spurge 'Dixter' (Euphorbia griffithii 'Dixter') flowers May to September and prefers full sun to partial shade on well-drained soil; wear gloves when.

https://en.wikipedia.org/wiki/Euphorbia_griffithii

Euphorbia griffithii 'Dixter'

Spurge 'Dixter' | Euphorbia griffithii 'Dixter'

Euphorbia griffithii 'Fireglow' is a clump-forming perennial spurge with an upright or spreading sub-shrub habit. Its narrow leaves are often glaucous or blue-grey and may take on red tones in autumn. Flowering occurs from May to September. The sap is an irritant to skin and eyes and the plant is harmful if eaten, so wear gloves and eye protection when handling.

Spurge 'Fireglow' (Euphorbia griffithii 'Fireglow') is a clump-forming perennial with glaucous foliage and flowering from May to September.

Euphorbia griffithii 'Fireglow'

Spurge 'Fireglow' | Euphorbia griffithii 'Fireglow'

Euphorbia hyberna is a clump-forming perennial spurge from Ireland with narrow, often blue-grey (glaucous) leaves that may take a red tint in autumn. It grows as an upright or spreading sub-shrub and can be evergreen, semi-evergreen or deciduous depending on conditions. Flowering occurs from May to September. Take care when pruning or handling as the milky sap is a skin and eye irritant.

Irish spurge (Euphorbia hyberna) is an Irish perennial with blue-grey foliage and May–September flowers, suited to dry shade and well-drained soils.

Euphorbia hyberna

Irish spurge | Euphorbia hyberna

Euphorbia lathyrus is a clump-forming perennial sub-shrub in the spurge family with an upright to spreading habit and narrow, often glaucous leaves. Foliage is frequently blue‑grey and can develop a red tint in autumn. Plants produce their flowers from May to September. Most forms prefer well-drained light soils and do not tolerate winter wet.

Euphorbia lathyrus is a clump-forming spurge with glaucous narrow leaves that flowers from May to September and prefers well-drained light soils.

Euphorbia lathyrus

Spurge | Euphorbia lathyrus

Euphorbia niciciana is a clump-forming perennial spurge in the family Euphorbiaceae, growing as an upright or spreading sub-shrub. It has narrow, often blue-grey or glaucous leaves that may be evergreen, semi-evergreen or deciduous depending on situation. Flowering occurs from May to September. Plants can show a red tint to the foliage in autumn.

Spurge (Euphorbia niciciana) is a clump-forming perennial with narrow blue-grey leaves and a May to September flowering season.

Euphorbia niciciana

Spurge | Euphorbia niciciana

Euphorbia pilosa is a clump-forming perennial sub-shrub with narrow, often blue‑grey (glaucous) leaves and an upright to spreading habit. Native to South Africa, it may be evergreen, semi‑evergreen or deciduous depending on site and flowers from May to September. It prefers well‑drained light soils such as loam, sand or chalk in full sun to partial shade and tolerates exposed or sheltered positions. Handle with care: the milky sap can irritate skin and eyes.

Hairy spurge (Euphorbia pilosa) is a South African perennial with glaucous foliage that flowers May to September.

Euphorbia pilosa

Hairy spurge | Euphorbia pilosa

Euphorbia polychroma is a clump-forming perennial sub-shrub with narrow, often blue-grey leaves and a long flowering season from May to September. It forms upright or spreading tufts and may be evergreen, semi-evergreen or deciduous depending on winter severity. Plants suit positions in full sun to partial shade and prefer well-drained soil. Handle with care: the milky sap is an irritant to skin and eyes.

Cushion Spurge (Euphorbia polychroma) is a clump-forming perennial with blue-grey leaves that flowers from May to September.

https://en.wikipedia.org/wiki/Euphorbia_epithymoides

Euphorbia polychroma

Cushion Spurge | Euphorbia polychroma

Euphorbia pulcherrima Sonora Salmon ('Fisson Salmon') is a poinsettia cultivar in the spurge family grown as a shrub, small tree or herbaceous perennial. It produces a seasonal display of bracts and flowers from May to September. Plant where it receives full sun on a south- or west-facing aspect and in free-draining chalk, clay, loam or sandy soils of any pH. Hardiness spans H3–H7 (borderline to fully hardy), making it suitable for borders, containers and gravel gardens.

Poinsettia (Euphorbia pulcherrima Sonora Salmon ('Fisson Salmon')) prefers full sun, well-drained soils and flowers from May to September.

Euphorbia pulcherrima Sonora Salmon ('Fisson Salmon')

Euphorbia rigida is a clump-forming perennial spurge with an upright or spreading sub-shrub habit and narrow, often blue-grey leaves. It reaches about 0.5 metres and flowers from May to September. Plants prefer well-drained soils and tolerate a range of soil pH. Wear gloves and eye protection when handling because the sap is an irritant and the plant is harmful if eaten.

Upright myrtle spurge Euphorbia rigida is a clump-forming perennial with blue-grey leaves that flowers from May to September, and its sap is irritant so.

https://en.wikipedia.org/wiki/Euphorbia_rigida

Euphorbia rigida

Upright myrtle spurge | Euphorbia rigida

Euphorbia robbiae is a clump-forming perennial spurge with narrow, often glaucous leaves and a compact habit to about 0.8 metres. It flowers from May to September and carries a milky sap that can irritate skin. Native to Italy, it suits a range of light garden soils provided drainage is good. Plants may be evergreen, semi-evergreen or briefly deciduous depending on site and season.

Euphorbia robbiae is a clump-forming spurge with glaucous leaves and May–September flowers, suited to sun or dry shade but with irritant sap.

Euphorbia robbiae

Euphorbia seguierana subsp. niciciana is a clump-forming perennial spurge with narrow, often glaucous leaves that may take a red tint in autumn. It grows as an upright or spreading sub-shrub and flowers from May to September. Suited to light, well-drained soils, it tolerates full sun to partial shade and the woodland forms will cope with dry shade. Most plants prefer to avoid winter wet.

Spurge (Euphorbia seguierana subsp. niciciana) is a clump-forming perennial with glaucous leaves and a long flowering season from May to September.

Euphorbia seguierana subsp. niciciana

Spurge | Euphorbia seguierana subsp. niciciana

Euphorbia seguieriana niciciana is a clump-forming member of the Euphorbiaceae with trailing and columnar upright stems and a prolonged flowering season from May to September. Foliage may be evergreen or deciduous depending on site and season. It suits well-drained chalk, clay, loam or sandy soils and will grow in full sun or partial shade. Use it in containers, gravel beds or courtyard settings on south-, west- or east-facing sites.

Euphorbia seguieriana niciciana flowers from May to September and suits well-drained, sunny or partially shaded positions in containers, gravel and.

Euphorbia seguieriana niciciana

Euphorbia sikkimensis is a clump-forming perennial sub-shrub with narrow, often blue-grey (glaucous) leaves that can turn red-tinted in autumn. It produces its flowers from May to September. The species tolerates full sun to partial shade and includes woodland forms that will cope with dry shade. The milky sap is an irritant and the plant is harmful if eaten, so wear gloves and eye protection when handling.

Sikkim spurge (Euphorbia sikkimensis) is a clump-forming perennial from Nepal to S China that flowers May to September and tolerates full sun to dry shade.

https://en.wikipedia.org/wiki/Euphorbia_sikkimensis

Euphorbia sikkimensis

Sikkim spurge | Euphorbia sikkimensis

Euphorbia wallichii is a clump-forming perennial sub-shrub with narrow, often blue-grey or glaucous leaves. It grows upright or spreading and may be evergreen, semi‑evergreen or deciduous depending on site. Flowering occurs from May to September. Handle with care: the sap is an irritant to skin and eyes and can be harmful if eaten, so wear gloves when handling.

Wallich spurge (Euphorbia wallichii) is a clump-forming perennial with blue-grey foliage and flowers from May to September.

https://en.wikipedia.org/wiki/Euphorbia_wallichii

Euphorbia wallichii

Wallich spurge | Euphorbia wallichii

Manihot esculenta (cassava) is an herbaceous perennial in the Euphorbiaceae, most often grown under glass in the UK as a conservatory or greenhouse specimen. It appears under many regional names including tapioca, yuca and manioc. In UK cultivation it flowers from July to September. It is normally maintained as a greenhouse/conservatory plant rather than an outdoor border subject.

Cassava (Manihot esculenta) is a conservatory herbaceous perennial in the UK that flowers from July to September.