Yellow-blooming species of the Coreopsis genus are not native to New England, though several have come from elsewhere in the country to naturalize here. The most widespread visitor is Coreopsis lanceolata, a tough Midwest-to-East-Coast species that thrives in sandy soil and can handle harsh conditions; the pictured flowers are growing along the sunbaked stretch of Route 6 opposite East Harbor in North Truro. A prolific reseeder, lanceleaf coreopsis has escaped gardens worldwide to naturalize across five continents; Japan has even declared it an invasive species.