Euphorbia mellifera (Introduced- UK)

Euphorbia mellifera Aiton, Hort. Kew. 3: 493 1789. (syn: Euphorbia longifolia Lam.; Euphorbia longifolia var. canariensis (Boiss.) Oudejans; Kobiosis mellifera (Aiton) Raf.; Tithymalus mellifer (Aiton) Moench);
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Madeira, Canary Islands; Introduced into: Great Britain as per POWO;
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Euphorbia mellifera Aiton: 7 very high res. images.

Agree Euphorbia mellifera.
My pics..
https://www.flickr.com/search/?user_id=11713966%40N02&sort=date-taken-desc&text=EUPHORBIA%20%20MELLIFERA&view_all=1

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References:
POWO  Catalogue of Life  The Plant List Ver.1.1  WCSP  IPNI  Wikipedia  Flickr