442 WOODSIA HYPERBOREA. 



Acrosticlium alpinum, Bolton. Poieet, 



" hypcrhoreum, Liljeblad. 



Ceterach alpimini, De Oandolle. 



PoJypodium arvwiicutn, Smith. 



" hyperhoreum, Swartz. Smith. Schkuhr. 



" " Presl. Willdenow. Sturm. 



" • " • Weber and Moiir, 



" hyperhoreum, var. gracile, Wahlenberg. 



" Ilvense, . Withering. 



" fontanum, Linnaeus. 



Woodsla — Named in honour of Josejoh Woods, a celebrated British 

 botanist. Hyperhorea — Northern. 



A SPECIES even more rare tlian JVoodsia Ilccnsis. It has 

 been found in North Wales, on Snowdon, by Mr. L. Clark. 

 In Scotland Professor Balfour has found it near Crieff, (on 

 Ben Chonzie,) Perthshire; Glen Isla, Forfarshire; and on the 

 Clova Mountains, (Glen Fiadh.) Mr. Dickson and Mr. W. 

 Wilson on Ben Lawers, INIael-dun-Crosk, Catjaghiamman, on 

 Craig Challiach, Perthshire; and Mr. J. T. Synie between Glen 

 Lochy and Glen Dochart. 



It is a native of Finland, Lapland, Sweden, Russia, Norway, 

 Germany, France, Switzerland, Spain, Hungary, Transylvania, 

 Silesia, Siberia, in the Punjab on the Himalaya, in America 

 on the Pocky Mountains and in Massachusetts. 



The fronds are linear, pinnate, without scales, though slightly 

 hairy. Pinnee somewhat triangular, pinnatifid, lobes roundish 

 obovate. 



Caudex brief. 



Length of frond from two to six inches, membranaceous, and 

 pale green in colour. Pinna? mostly alternate, the basal ones 

 distant. 



Sori medial, circular in form, and cojiious. 



JVoodsia hyperhorea differs from JVoodsia Ihoisis in having 

 the fronds smaller, narrower, and smoother. Under cultivation 

 the JVoodsias should be kept out of sunshine. Drain well, 

 and use a compost of light loam, sand, a little peat, with 

 charcoal and broken stones. 



There arc no varieties. 



