This taxon may have a broad range in North America, except for the southeast, whereas typical cespitosa mostly occurs in more western regions (F, W). In Ky. "glauca" is known only from alluvial crevices in rocky limestone banks of the Kentucky Rv. along the central Palisades. Compared to typical cespitosa, these plants have smaller overall dimensions (including the diagnostic ligule of F and W) and they occur in more base-rich habitats, at least on the south side of their range. However, the name "glauca" is provisional and may be illegitimate (FNA 24). There has not yet been a comprehensive modern revision of the cespitosa complex, with all its potential segregates; 2n = 18 to 52 in the complex, with some aneuploidy. An initial study in arctic regions by Chiapella et al. (2011) has supported recognition of glauca as D. cespitosa (L.) P. Beauv. ssp. glauca (Hartm.) C. Hartm, along with several other segregates.