184 H. G. SIMMONS. [sec. arct. exp. fkam 



Maine, Ontario, Alaska, East Siberia, mountains of Central Asia, Ural, 

 Northern Russia, Scandinavian mountains. Central European mountains. 

 Great Britain, Iceland. The main form has about the same distribution, 

 only a little wider. 



Woodsia, glabella, R. Be. 



W. glabella, R. Brown, in Richardson, App. Franklin I, 1823; Lange, Consp. Fl. 

 Groenl. ; Hart, Bot. Br. Pol. Exp. ; Hooker, Fl. Bor. Amer. ; Britton & Brown, 

 111. Fl. ; Kurtz, Fl. Tschuktsch. ; Ledebour, Fl. Ross. ; Andersson & Hessel- 

 MAN, Spetsb. kfirlv. ; Luerssen, Farnpfl. ; W. hyperhorea var. glabella, Traut- 

 vetter, Syll. Sib. bor. or.; W. ilvensis var. glabella, Gelert, in Ostenfeld, 

 Fl. Arct.; Krcuse, List E. Greenl. 



Fig. Hooker, 1. c, 2, T. 237; Fl. Dan., T. 2921. 



In my opinion, this plant differs sufficiently from both forms of 

 W. ilvensis to obtain the rank of separate species, and not to be 

 thrown in with it as Trautvetter and Gelert have done. The inter- 

 mediate forms in the Copenhagen collection, of which Gelert speaks 

 (1. c, p. 8), may, in my opinion, always without hesitation be placed 

 under one of them. 



The characters which especially distinguish W. glabella from the 

 last species are: — the stipes is covered with scales only below the 

 node, up to the first pair of leaflets there may be a few hairs, but no 

 scales; the whole rachis and the leaflets are entirely glabrous; the lower 

 leaflets are more rounded than in W. ilvensis, deeply intersected, with 

 cuneate lobes; the veins of the leaflet distinctly visible, divergent, in 

 W. ilvensis so obscure as to be hardly visible even if the leaf is held 

 up to the light. 



It grew in rockclefts and was doubtless more spread than the 

 preceding one. 



Occurrence. Hayes Sound region : "Edwards Grief" (Hart), Twin 

 Glacier Valley (Hart, 851), Cape Viele (866), Lastraea Valley (1238), 

 low point west of Cape Rutherford (1348). South coast : Harbour Fjord, 

 Big Valley, Seagull Rock, Spade point (2529), Lake Valley and the 

 precipices east of the anchorage (2036, 2235, 2459, 2536, 2543) to the 

 "green patch" (1861, 2554), Western Sound, valley on Sir Inglis Peak 

 (2165). Not found outside the archaean territory. 



Distribution: East and West Greenland, Arctic American Archi- 

 pelago, Arctic America and down to Lake Superior and the North- 

 western United States, Alaska, Land of the Chukches, East Siberia, 

 Kamshatka, mouth of the Lena River, Ural, Arctic Russia, Spitsbergen, 

 Northern Scandinavia, the Alps. 



