During my wanderings in the Miller House and Eagle Summit region I have never seen the oak fern, but on a talus slope above a road leading to the mines the limestone fern, as it is sometimes called, is plentiful (nos. 1972, 3447). One day I was surprised to find a few fronds growing in a space between the logs of the outer wall of Miller Roadhouse. In Livengood I have collected it two different years on a mossy shaded bank, where water is seeping down from overhanging cliffs, (nos. 1679 [1940], 4881 [1947]). Collections preserved in the Gray Herbarium-all from the Central Yukon-include: Dawson Slide, Eastwood 361, 362; Dawson, Malte 72; woods 2 miles below Coal Creek, Funston 145; Fort Gibbon, 1899-1901, Weirick. Hulten's list mentions, also: Hunker Creek, July 22, 1902, Macoun (Can); 4 miles up Klondike River, Aug. 8, 1902, Macoun (Can); Rampart-Tanana, Palmer, 39 (Can.), and reports from: near mouth of the Klondike River, Williams (ace. to Underwood), and the Tatunduk-Nation River district (ace. to Mertie). ATHYRIUM FILIX-FEMINA (L.) Roth. var. SITCHENSE Rupr. ex Moore. [var. cyclosorum (Rupr.) C. Chr.]. As has proved true with some other ferns treated in this paper, the hot springs afford the only known locations for the lady fern in the Central Yukon River District, and also the northernmost station for the species in Alaska, with a wide gap between these two stations and the Pacific Coastal regions where it is a common fern. Collections from the hot springs include: Circle, Scamman 19, 20, 3449, Anderson 7551 (G), and Manley, 47