(>8 WOODSIA TLVENSIS. 



NepJirodium rufidiilum, Michatjx. 



" lamosum, Michaux. 



Lastrea rufidula, Presl. 



LoncJiitis aspera ilvensis, Palechamps. 



Woodsia — After Woods, a well-kno-RT) Botanist. Ilvensis — Ilva. 



The Oblong Woodsia is a beautiful dwarf indigenous species, 

 growing in crevices of rocks, and very rare in Great Britain. 



A deciduous half-hardy species under cultivation. 



Introduced into the Royal Gardens, Kew, in the year 1791. 



Found only on Glyder Fawr, North Wales, Falconclints, in 

 Teesdale, MoiFat, and on the Clova Mountains, Stirling, Ben 

 Lawers, Forres, Dumfries, Pebbles, and Selkirk; Westmorland, 

 Bowness, in Cumberland, and on Snowdon. 



Abroad it is found in Iceland, Greenland, Lapland, Sweden, 

 Norway, Russia, Spain, Italy, Siberia, Altai Mountains and 

 Lake Baikal, Germany, Kamtschatka, Saskatchawan, Rocky 

 Mountains, Canada, and the United States. 



The fronds, which are lanceolate, are pinnate and hairy, 

 more especially beneath; pinnae oblong and profoundly pinna- 

 tifid, with oblong-obtuse, sometimes crenated lobes. 



Sori circular and sub-terminal. 



Indusium deeply laciniated and ending in jointed hairs. 



Stipes articulated considerably above the rhizoma; stipes and 

 rachis chaffy. Rhizoma in some degree tufted. 



Length of frond from three to six inches; colour pale 

 whitish green. 



Stipes pale reddish brown, from one to two inches long. 



Pinnse sometimes opposite, and sometimes alternate. 



Lobes more numerous than in Woodsia hyperhorea. 



Veins branched. 



W. ilvensis is broader than JV. hyperhorea^ and the pinns 

 more oblong; it can also be recognised by its under surface 

 being very scaly. 



For plants my thanks are due to Mr. Backhouse, of York, 

 and to Mr. Pearson, of Chilwell; and for fronds to Mr. 

 Joseph Sidebotham, of Manchester, and to Professor Balfour, 

 of Edinburgh. 



The illustration is from Professor Balfour's fronds. 



