7a. Dryas integrifolia Vahl subsp. integrifolia
Dryas chamissonis Sprengel ex Juzepczuk; D. integrifolia var. canescens Simmons; D. integrifolia subsp. chamissonis (Sprengel ex Juzepczuk) Scoggan; D. integrifolia var. subintegrifolia Hultén
Leaf blades linear to narrowly ovate, base cordate to truncate, margins usually strongly revolute, entire or crenate to serrate or dentate in proximal 2/3–3/4, apex acute. 2n = 18.
Flowering Jun–Aug. Tundra, heathlands, rocky mountain slopes, grasslands, sandy ridges and beaches, mesic and dry areas, solifluction soil; 0–2600 m; Greenland; Alta., B.C., Man., Nfld. and Labr., N.W.T., Nunavut, Ont., Que., Yukon; Alaska; e Asia (Russian Far East).
In some states and provinces, subsp. integrifolia has a limited distribution: central and northeastern Manitoba, northern Lake Superior and the Hudson Bay region of Ontario, and southeastern and northern Quebec.
In Greenland, subsp. integrifolia has widely introgressed with Dryas octopetala.
Dryas ×lewinii Rouleau (D. ×wyssiana Beauverd, name invalid) of Newfoundland is a putative hybrid between subsp. integrifolia and D. drummondii.