Euphorbia balsamifera

This is the form native to Tenerife. In the Canary Islands It occurs in lowland dry areas, typically called the Canarian Euphorbia scrub. It can also be found up to 600 m in elevation, as long as the area is well drained and there is no competition by faster shrubs or trees.
Photo taken from Wikipedia : Di Frank Vincentz - Opera propria, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=3745791