Glabrosity of subsp. parlinii is undoubtedly inherited from Antennaria racemosa (R. J. Bayer 1985b; Bayer and D. J. Crawford 1986).
From Flora of Indiana (1940) by Charles C. Deam
Rather frequent throughout the state in dry, clay or sandy soil in open places in woodland, on the tops of high, wooded banks of streams, on roadside knolls, and in pastures. Staminate plants as frequent as the pistillate ones. Antennaria Parlinii var. arnoglossa (Greene) Fern. is a more glabrous form of the species which I reported from Vermillion County. I now include this form with the species.