Galinsoga mandonii is a South American species of flowering plant in the family Asteraceae.

It has been found in Peru, Bolivia, and far northwestern Argentina.

[1] Galinsoga mandonii is a branching annual herb up to 66 cm (26 in) tall.

Flower heads are up to 6.5 mm (0.26 in) across.

Each head has 3-9 white or dark purple ray flowers surrounding about 5-40 yellow or purple disc flowers.