My 5 "weed" spurges (I have others which don't need controlling) are
Petty spurge - probably the little ones you have in your garden
Upright spurge - about 18 inches, multiple stems
Wood spurge - spreads by runners and is very invasive
Cypress spurge - another invasive one spreading by runners
Caper spurge - stems an inch thick, grows to 6ft high
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