Senecio species contain livertoxic pyrrolizidine alkaloids. Read more here. -Henriette
Erigeron sive senecio.
A common weed in our gardens, and upon walls, with little yellow flowers, and downy seeds; it grows eight inches high: the stalk is round, fleshy, tolerably upright, and green or purplish: the leaves are oblong, broad, blunt, and divided at the edges. The flowers are small and yellow; they grow in a sort of long cups at the tops of the stalks and branches.
The juice of this herb is a gentle and very good emetic. It causes vomiting without any great irritation or pain; and it is also good for cutaneous foulnesses applied outwardly.