Name requested: Umbilicaria hyperborea

	Lichenologist 3 (1): 150. 12 (1): 101.
	Lichens of North America null: 24, 699, 703, 706, 708.
	Mycologia 60 (5): 1097.
	Mycotaxon 18 (1): 178. 21: 304. 35 (2): 385, 388, 389, 390. 40: 203, 257. 48: 259, 264, 265, 266. 53: 107. 58: 223. 74 (2): 438, 439, 444.