This northeastern species (sometimes named B. altissimus Pursh) occurs from New England to the northern Great Plains. It has been reported from Ky. by B and other authors (M), but the only verified colls. located for this Atlas are from rich weedy flooplain woods in LEWI (EKY) and PULA (KY). Also, Anderson (1924) reported that a coll. from FAYE then existed at KY: R. Peter, 14 Sep 1834, Clay's Ferry. There are colls. from some adjacent counties in Ind. (D), Ohio (GH); see also F. The extensive mapping across Ky. by FNA 24 and K is erroneous, perhaps due to switching of data with pubescens. Compared to pubescens, latiglumis differs in its anthers, with are usually shorter (ca. 1.5-3 mm versus 2.5-4 mm), and produced in Aug-Sep (versus Jun-Jul); its sheaths have a distinct villous ring at summit (usually absent or indistinct in pubescens) and clasping auricles (absent in pubescens); nodes are mostly covered (versus at least the upper exposed). Leaves tend to be darker green and more numerous (ca. 6-20 versus 4-6), with plants usually taller (up to 2 m versus 1.5 m). Plants originally described as B. purgans L. var. incanus Shear are now considered just a more hairy form of latiglumis (perhaps including the colls. from FAYE and PULA).