The indument of subsp. fallax is undoubtedly inherited from two of its sexual progenitors, Antennaria plantaginifolia and A. solitaria (R. J. Bayer 1985b; Bayer and D. J. Crawford 1986).
From Flora of Indiana (1940) by Charles C. Deam
This species closely resembles the preceding one [Antennariaplantaginifolia] and was not separated from it in Britton and Brown, Illustrated Flora, edition 2. This is the most common species of the genus in the state. Frequent in all parts of the state in dry clay or sandy soil in open woodland and pastures and on roadside knolls. [Variety calophylla, if recognized,] is more frequent in the southern counties and according to Fernald "ranges from Georgia to Texas, coming north to Virginia, Indiana, Illinois, and Missouri, in the northern states passing insensibly into A. fallax." The only specimen of [A. munda] from Indiana which I have seen is the one I collected in Porter County. Fernald writes me that a duplicate of this number belongs to this species. I have not been able to make an intensive study of this and the preceding species [Antennaria fallax]. I have not seen a key that will definitely separate them. In this complex I am also including our reports of Antennaria occidentalis Greene.