This euphorbia characias subsp. wulfenii has developed an interesting deformity. I presume it is a virus infection, but I would be interested to know more about it and what might need to be done. In the Pender Harbour area. I have added the last picture to show what it should look like.
Here's a link about fasciation. I think that's what's happening to your plant. I have seen some other Euphorbias that have developed this aberrent growth pattern. Fasciation/RHS Gardening
That's so beautiful. I found another fasciated Euphorbia photo with a few comments that don't add much to Lysichiton's link, just shows you're in good company: Euphorbia mutation
