An erect, perennial herb, 1 to 2 feet high, stems slender, striate, smooth or more or less pubescent, especially below. Leaves smooth or somewhat hairy, opposite; the basal and lower stem leaves spatulate or oblong, entire, sometimes with a pair of lateral lobes, 2 to 6 inches long, on slender petioles; upper stem leaves few, lanceolate to oblong, nearly sessile. Heads of flowers usually few, 11/2 to 21/2 inches broad, showy, bright yellow, borne on long, slender peduncles often 8 to 12 inches long. Involucres rather flattened, their bracts ovate-lanceolate, in two series, the outer narrower than the inner but nearly as long. Ray flowers six to ten in number, wedge-shaped, three to seven-notched at the apex, forming a single row around the darker yellow disk. Achenes oblong, winged on the edges, with two short teeth projecting from the summit, giving it somewhat the appearance of a bug. It is from this character of the achene that the generic name Coreopsis, meaning " buglike," is derived.
In moist or dry soil, Ontario to Michigan, south to New York, Virginia, Florida, Louisiana and Missouri. Flowering from June to August.
Memoir 15 N. Y. State Museum
A. Lance-Leaved Tickseed - Coreopsis lanceolata