Dwarf Canadian Horseweed is tall and spindly Florida native. It has a large flower head at the top, but the blooms are so tiny that they barely register with the eye. It is a perennial and blooms mainly summer to fall. The flowers are white and yellow and resemble a daisy, only in extreme miniature.
Canadian horseweed is edible, maybe even good-tasting, depending on how it’s prepared. Both Native Americans and early European settlers found it useful as a medicine. And in a pinch, if you need a fire and don’t have matches, this stuff will do.
Source: Wild South Florida