Mapping remains somewhat tentative; better descriptions and keys are needed for section Viorna; 2n may be 16 in all species and hybrids can be expected. C. glaucophylla is known mostly from scattered localities in nw. Fla., Ga, Ala., e. Miss. central and se. Tenn. (D. Estes, pers. comm.). There is a need to collect more complete material and fresh flowers, including disjunct plants that have been referred to glaucophylla from n. La., s. Ark. and se. Okl. (FNA 3; see colls. at MO). There appear to be hybrids or introgressants with versicolor and perhaps reticulata (T. Murphy, pers. comm.). The name glaucophylla has also been misapplied in Ky. to viorna along Appalachian rivers (J, NP, M; and citations). Records mapped here from BARR, CARL and WARR are based on old colls. of S. Price (MO) and O'Dell & Windler (SIU) that have been determined as glaucophylla based largely on leaflet texture, following Erickson (1943) and FNA 3. More recent colls. from CLIN & CUMB (EKY), EDMO (APSC, EKY), HART (MEM and NKY rediscovered by R. Seymour, pers. comm.) and PULA (APSC) include fresh flowers with some images. Distinction from versicolor may be difficult, especially in the herbarium (F, FNA 3, Ch+). Achenes and their plumose beaks are pale golden-brownish (versus silvery-whitish) and recurved down the stem, presenting a heart-shaped profile for each fruit (versus globular). Fresh sepals lack distinct dorsal ridges (versus present), and they become more deeply reddish: "cherry red to reddish-purple" versus "purplish-red to bluish-lavendar, creamy or greenish distally" (D. Estes in Ch+). Bracts are mostly 30-50% bove the peduncle base (versus 10-30%), and secondary flowers no not usually emerge from bract axils (versus often so in vigorous plants). Leaflets of glaucophylla tend to be relatively large, the distal ones ca. 3-10 x 2-7.5 cm (versus 2-8 x 1.5-6.5 cm) and thin (versus usually thick and coriaceous); midribs on lower surfaces are occasionally lined with a thin zone of papillae or short trichomes (versus completely glabrous); primary lateral veins prominent, but usually not higher orders (versus primary, secondary and tertiary veins prominently reticulate); proximal leaflets are often lobed or trifoliate (versus mostly unlobed or occasionally 2-3-lobed), often with acute apices (versus usually obtuse). The species appears to occur, on average, in less xeric habitats than versicolor, typically on lower slopes or near streams (versus along calcareous cliffs); but both typically occur in thin upland woods and edges on base-rich soils.