Many plants commonly called weeds are called wildflowers scientifically. It accounts where they grow and who sees them. The plant in the photo is one of those.

Golden Tickseed [Coreopsis tinctoria] also called Plain Coreopsis and Calliopsis is a native plant of the Americas but got introduced to China where it is widely naturalized and cultivated.
When it grows in nature parks and meadows it is called wildflower, but on roadsides or cultivated fields it is called weed. Although many gardeners have it cultivated on their properties and call it flower.
The plant could reach 40 inches [about 1m] height under favorable conditions. One to five flower heads are siting on slender stems.
The plant is used by Native American as hot beverage for medical use. The Zuni use the blossoms to produce dye for yarn.

Sony DSC-HX200V, f/2.8, 1/1600 sec, ISO 100, focal length 5 mm, daylight at 4:55 PM