Asteraceae, the daisy, sunflower or composite family.
Description:
Plant:
Low, somewhat hairy plant, 6"-2', with opposite leaves and loose
clusters of tiny white flower heads. Annual.
Flowers:
Tiny 1/4" heads with five white rays, each with two notches (sometimes one),
and a yellow center of disk flowers.
Flowers in loose, few-flowered, leafy clusters (cymes).
Leaves:
Opposite, lower leaves ovate and coarsely toothed, ones at base of flowers
lanceolate, both are somewhat hairy.
Fruit:
Dry and seed-like (an achene)
Blooming:
August-October
Habitat:
Edges of woods, weedy places, clearings.
Comments:
Widely distributed in temperate climates, probably native to Mexico.
Where to find it:
I have found this plant on the narrow strip between the parking lot and
the woods.