Here's a look at the yellow flowered form of wild radish. The flowers might also be white. The author of the Wiki article on this species lumps wild and all cultivated radishes into one species. Others do not. Does it matter? Perhaps only if you need a lable that tells you if you want its roots before you pull them up.
Jack-in-the-pulpit is the floral emblem of the Huron Valley Chapter of the Michigan Botany Club. Now we discover we also have an anthem! Written around 1983 by Jocelyn Baker, set to the tune of "The Band Plays On".
So what's the difference? Do we care? Of course we do. That's the way we are. So false rue-anemone has only one flower on a stem. Rue anemone most often has a cluster of a few flowers, often three. Both of these have rounded ends on the leaflets. Wood anemone may be most like false rue-anemone in general aspect, but has pointed leaflets. These rue-anemones are pink, but the species most ofter has white flowers.