Global Range: A. racemosa is found in North America, from eastern Canada south to northern Georgia in the east and south to Utah, New Mexico, and northern Mexico in the west (Gleason and Cronquist 1963, USDA-NRCS 1999). The number of A. racemosa county records declines greatly in the western and southwestern states of this species' range, and the population locus for this species appears to occur roughly at the Great Lakes (USDA-NRCS 1999). This species is found in 10 counties in Arkansas (Arkansas Natural Heritage Commission). It occurs in rich woods throughout southern and central Ontario (Ontario Natural Heritage Information Centre). It is known from all counties in Maine (Maine Natural Areas Program). It is common in eastern Kentucky, becoming infrequent to rare westward (Kentucky Natural Heritage Program). It is widespread throughout Michigan (Michigan Natural Features Inventory) and Missouri (Missouri Department of Conservation). One occurrence of this species is known from Kansas (Kansas Natural Features Inventory). It is scattered throughout the state in Indiana (Indiana Natural Heritage Data Center). Eight occurrences are known from Nebraska (Nebraska Natural Heritage Program). One extant occurrence is recorded for Colorado, but other historical records are known from the east and west slopes where it persists as a disjunct Pleistocene relict (Weber and Wittmann 1996a, Weber and Wittmann 1996b). Sixty populations are reported from Delaware (Delaware Natural Heritage Program). This species occurs in two, possibly three counties in Mississippi (Mississippi Natural Heritage Program). In Manitoba, it occurs sporadically at the southern limit of the boreal forest in aspen-oak parkland, where it is at its northwestern limit (Manitoba Conservation Data Centre).