Coreopsis lanceolataCoreopsis lanceolataTaxonomy
Coreopsis lanceolata L., Sp. Pl. 2:908. 1753Common synonyms
Chrysomelea lanceolata Tausch; Coreopsis crassifolia Dryand. ex Aiton; Coreopsis heterogyna Fernald; Coreopsis lanceolata var. angustifolia Torr. & A.Gray; Coreopsis lanceolata var. glabella Michx.; Coreopsis lanceolata var. lanceolata; Coreopsis lanceolata var. pumila Moldenke; Coreopsis lanceolata var. succisaefolia DC.; Coreopsis lanceolata var. succisifolia DC. ; Coreopsis lanceolata var. villosa Michx. ; Coreopsis oblongifolia Nutt.; Coreopsoides lanceolata (L.) MoenchCommon name
Garden Coreopsis, lance leaf tickseedDescription
Propagule or dispersal unit is the fruit with (very inconspicuous) pappus. Fertile part 2-3.5 mm long, 1.4-2.1 mm wide, in side view widest in the middle, conspicuously curved, the upper (apical) end narrowing, in cross-section flattened, basal scar (carpopodium) pronounced and well-differentiated, off to the side (oblique) or at least asymmetric, beak (=thinner sterile stalk between seed and pappus) absent, wings present, 0.8-1.5 mm wide, fruit surface black, smooth (except at cellular level) or with round protrusions or bumps, with no hairs (glabrous), thickened margin absent, longitudinal ribs absent.
Pappus type bristles / hairs, or absent (by misinterpretation), pappus elements all +/- similar, up to 0-0.5 mm long, in one row, number of pappus elements two, persistent, the individual bristles rough / serrated (barbellate), +/- equal width along length, brown.
Note: The key accommodates scoring the surface bumps as glands.
Ecology
Perennial herb, seeds winged and wind-dispersed. Temperate to subtropical regions. Ornamental plant becoming weedy as a garden escapee, often along roads and railways and in disturbed areas.
Native range
Eastern and central United States.
