This is widespread in cool temperate to boreal regions of North America. It has been reported from Ky. by Pr, Gm and others (FNA 24, K), but no verified colls. have been documented for this Atlas. Colls. from MENI, ROWA (MDKY) and elsewhere have been tentatively assigned to ciliatus by some botanists, but need further study. B. ciliatus differs from pubescens in its smaller anthers, ca. 0.9-1.7 mm (versus 2.5-5 mm). Also its lemmas are usually pubescent in two marginal bands with relatively long hairs (versus more uniformly pubescent), and the lateral nerves are distinct to base (versus obscure below middle). In southern Appalachian regions, ciliatus is known only from disjunct localities at high elevation. B. kalmii Gray is a related northeastern species that has been reported from nearby in Ind., Ohio, W.Va. and Va. (FNA 24, D, W), but reports from Ky. (as in K) have been erroneous (M). It has moderately small anthers (ca. 1-2.5 mm); lemmas are densely long-pilose, with awns only 2-3 mm long; first glumes are 3-nerved, second glumes 5-nerved.