Atlas of North European vascular plants
Hultén & Fries 1986
35 Hymenophyllum tunbrigense (L.) Sm.
This widespread but disjunctly distributed species may be regarded as a preglacial relict. The distribution outside the map area is noted in the margin of the map. For the total distribution see Pichi-Sermolli in Lav. Soc. ltal. Biogeogr. 1/1970, map p. 94, for Europe see Atlas Fl. Eur. 1/1972, map 69, for Africa see map by Schelpe in Bot. Not. (Lund) 121/1968, p. 367.