golden groundsel: weedy herb of the eastern United States to Texas having golden-yellow flowers; sometimes becomes invasive; sometimes placed in genus Senecio
herb: a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests
hydralazine: an antihypertensive drug (trade name Apresoline) that dilates blood vessels; used (often with a diuretic) to treat hypertension and congestive heart failure