| Distribution | The taxonomic split between M. arvensis in the strict sense and M. canadensis -- a native species in N.A. -- has not carried over to many herbaria. Hardly any specimens have been annotated. Therefore, we cannot with certainty identify each and every specimen. Nonetheless, collections from Iredell and Macon counties appear to represent M. arvensis strict sense. Iredell must be deleted, since it was gathered from an unknown source by Hyams. There are 2 Macon collections, from 1945 and 1951 (at DUKE). A specimen from Dare County (NCSC) is actually a Pycnanthemum. Note that Weakley (2024) no longer lists this species for NC, suggesting the old RAB (1968) record for Macon County refer to the native M. canadensis. However, SERNEC does contain a few scattered records listed for M. arvensis; these are mapped below.
Native of Europe; in N.A., Weakley (2024a) shows a range from northern VA northward, but as this is not a native, it likely can show up is strange places, if not directly planted. | |
