BRITISH FERNS. 
89 
THE WOODSI AS (W. ILVENSIS AND 
W. HYPERBOREA). 
THESE species and the following ones we merely mention for 
completeness sake and for the benefit of species lovers, since 
they cannot claim any decorative value, and have afforded no 
sports worthy of attention. The Woodsias are both mountain 
Ferns, dwelling in the rock chinks at high elevations. I hey 
are small and nearly twice divided, with fronds 2 inches or 
3 inches high. W. ilvensis is the larger of the two, and has a 
longer stalk relatively to W. hyperborea, whose pinnae are 
shorter. Otherwise there is little difference. Both are deciduous, 
and may be grown under a bell-glass. They are characterised 
by very peculiar and pretty indusia, or spore covers, consisting 
of a number of radiating filaments, which are turned up over 
the spores. No varieties of either. 
ASPLENIUftl Till CIIO MANES VAIl. CIIENATUM GROWING WILD. 
