Premise: Rudbeckia hirta, commonly called black-eyed-Susan, is a North American flowering plant in the sunflower family, native to Eastern and Central North America and naturalized in the Western part of the continent as well as in China. It has now been found in all 10 Canadian Provinces and all 48 of the states in the contiguous United States.
Hypothesis: In 48 contiguous states, Rudbeckia hirta, commonly known as black-eyed Susan can be found.