Ragwort
(Senecio jacobaea or Jacobaea vulgaris)
other names: common ragwort, hysterical weed,
ragwort, stagger wort,
staggerwort, tansy butterweed,
tansy ragwort, stinking willie,
stinking willy, St James' wort,
yellow ragwort
Ragwort is poisonous invasive species
But no problem for humans becasue you
would have to eat lots for it to be a problem
Horses will not eat the plant becasue it tastes bad
but if it grows in a hay field and is cut with the hay
bad taste is lost when dried, but poison remains.