Leaves: petiole glabrate or sparsely hairy, hairs gray to white; blade dull adaxially, 52-97 mm, abaxial surface densely to sparsely villous, hairs white to gray.

Flowering Jun-Jul. Upland and floodplain forests, prairie margins; 300-1300 m; Ark., Ill., Kans., Ky., La., Mo., Okla., Tex.

Subspecies oblongifolium generally occurs in the mid-continent region and is characterized by white to gray indument on the abaxial leaf surfaces. Hair color varies from gray to white among some specimens from Texas and northern Mexico.