This somewhat ornamental but persistently rhizomatous weed has probably been present since early after settlement (Rafinesque 1824, Short 1840). It can increase in cattle-graed areas (Mitich 2000). (Plants are generally unpalatble for mammalian herbivores but flower buds may be harvested for human use in pickles or teas; in contrast, the allied Glebiois coronaria is widely used for edible greens in East Asia.) Short noted: "A troublesome weed in the Eastern States, which will soon be introduced into the West." In 1914, Gm noted: "very common and troublesome... Superintendents of parks and cemeteries are often very much afraid of it, and sometimes forbid visitors bringing the flowers..." Variation deserves further attention (Cr); 2n = 18 usually but polyploids are known (as in several other Anthemideae). Most colls. from Ky. are referable to var. pinnatifidum (Lecoq & Lamotte) Moldenke, but that taxon has not been generally recognized in recent treatments. Two other closely related species are expected (FNA 19, W): L. maximum (Ramond) DC and L. lacustre (Brotero) Sampaio. The "Shasta Daisy" may be derived from hybridization of these two species, or perhaps naximum x vulgare as well; several cultivars are widely distributed. A small patch of maximum was recently discovered along a road in HART (JC), about 300 m from the nearest house.