12-22-38 Ffern Collected at Cliff Dwellings beyond Roosevelt Dam. Drift specimen studied 9-21-39 life size. (Primary div. slightly wider than in alactels & more nearly uniform in appearance. Stipe dark brown, sliming, rather short. Frond dark green, glabrous above, thickly covered with pale green powder beneath. No hairs or scales any- where except 1-2 scales at very base of stipe where broken from root-stocks). Sori marginal, not concealed by the slightly revolute margin of ff. No signs of indusium (there are old sori). Sori sometimes appear continuous, & hence margin of fertile; sometimes not continuous & hence margin of ff obscurely crenate (20x). Note: lowest pair of divisions of frond really branch from mid vein & the pair next above very near the base so that effect to eye is that all five 3 divisions originate at same point. R.B.K. at first thought this might be a simple form of Gymnopoteris triangularis Underw. How. 17 but that seems unlikely (impossible if Gymnopoteris is a synonym for Gynnoptera or Ptyograma For possible genus see Notholaena P.B2. J37; M5. [which] no species in T.M. fits our plant.