I tried to use the species browser in the aid of some spurge identifications.
After slowly working through the hierarchy to get to Euphorbia (it took time for iSpot to display all the thumbnails, especially for flowering plant orders) I ended up here
https://www.ispotnature.org/communities/uk-and-ireland/species-browser/NHMSYS0000458629/euphorbia
Note that even common species like E. peplus and E. helioscopia have no examples.