The anecdotal story tells of how Qu Yuan visited a Great Diviner to resolve some of his moral dilemmas, by means of plastromancy or by casting yarrow stalks.
Recently, the lake has had a problem with milfoil, and there are several fundraisers every year to help the Milfoil Foundation, which then uses the money to pay for the milfoil's extraction.
They feed on a wide variety of plants and grasses, including Achillea millefolium, wormwood (Artemisia), carrot (Daucus), tansy (Tanacetum), Inula and hawkweed (Hieracium).
Associated plants include several species of Carex, such as C. scoparia, C. tenera, and C. tincta, plus Rumex acetosella, Leucanthemum vulgare, Ranunculus acris, Anaphalis margaritacea, Achillea millefolium, Phleum pratense, Vicia cracca, Juncus spp.
Plant species occurring with this cinquefoil in multiple habitat types include prairie junegrass (Koeleria macrantha), elk sedge (Carex geyeri), western yarrow (Achillea millefolium), silvery lupine (Lupinus argenteus), common dandelion (Taraxacum officinale), and beautiful fleabane (Erigeron formosissimus).