help.......is this a weed or a plant?

i would love to know what this is. im not the best gardener and i normally dig things up i dont likt the look of. but i have loads of these plants appeared.

 

well i was thinking of pulling them up, but as its not a weed i'll let it stay. hoping now i get some flowers of it.
thanks for your help

 

Euphorbia lathyris. Common name caper spurge.
Be very careful the white latex sap is toxic.

https://www.google.co.uk/search?hl=en&cp=11&gs_id=33&xhr=t&q=euphorbia lathyris&bav=on.2,or.r_gc.r_pw.r_qf.,cf.osb&wrapid=tljp1335303417668031&um=1&ie=UTF-8&tbm=isch&source=og&sa=N&tab=wi&ei=Hh2XT47nGZHy8QPHzcGVCg&biw=1376&bih=663&sei=Lx2XT6OuOs6-8gOzy5jpCQ

 

I don't think you'll get any worthwhile flowers off it! I'd pull it up, especially if it's in the way and definitely before it drops any seeds. They look quite interesting in a sculptural sort of way, though.

 

These popped up all over my garden when we first moved into our house and I spent ages pulling them up because they were so widespread (the garden hadn't been worked for 18 months). However, I did find they were easy to pull up and I came to quite like them in the right place. As Armandii says, they are legitimate border plants and after all a weed is only a plant growing in the wrong place!

 

In my garden a Euphorbia is a weed in the wrong place, it doesn't matter how many I pull up there's more to replace them.