Rosa carolina subsp. subserrulata

From Flora of Indiana (1940) by Charles C. Deam

This rose is intermediate between Rosa carolina and Rosa suffulta, and has been produced experimentally by Dr. Erlanson by crossing these species. Because of its hybrid nature it is difficult to identify unless one is familiar with our wild roses. In former accounts of the genus the tendency of Rosa rudiuscula to have thick, leathery leaves has been stressed. This characteristic is also found in Rosa carolina and is not invariably present in the hybrid. According to my records this hybrid grows only in prairie habitats where it is more or less frequent, especially in the northern parts of Benton County and in the southern part of Jasper County.

……

Indiana Coefficient of Conservatism: C = 4

Wetland Indicator Status: FACU