Lanceleaf tickseed
Coreopsis lanceolata L. [Asteraceae]
Ookinkeigiku (オオキンケイギク, 大金鶏菊)
Lifeform: perennial forb
Distribution: Native to North America (exotic to Japan, assigned as an invasive alien species by the Invasive Alien Species Act Law of Japan)
Habitat: roadsides, riverbeds, etc.
Coreopsis lanceolata in Japan
[Left] The photos were taken in Nagaoka Municipal Skislope, Niigata Prefecture, on August 31, 1990. [Right] at a roadside of N30/E4, East Ward, Sapporo, on August 30 2009. Looks like a garden flower.