Tagetes erecta L. (incl. T. patula L.), Marigold, was collected by Douglass Houghton at Sault Ste. Marie, Chippewa Co., Oct. 1, 1831. Though Houghton did not indicate ""exotic" on this specimen, as he often did for cultivated plants, it is probable that this was from a cultivated occurence and Houghton's interest in the plant was for its medicinal potential. It resembles a large Dyssodia, is similarly glandular and strong smelling, and would run to here in the key. Tagetes, however, has much larger heads with longer, more conspicuous rays and involucral bracts connate for at least 1/3 of their length (as opposed to ± free).  Though not confirmed as a wild plant in Michigan, T. erecta has been collected as an escape in adjacent Lambton Co., Ontario.