GENUS IV. 
WOODSIA, R. Brown. 
GEM. CHAR. Sori circular, attached near the ex- 
tremity of the venules. Indusium divided at the margin 
into numerous incurved capillary jointed segments, inferior 
and therefore involucral. Veins free ; mid-vein indistinct ; 
venules simple or forked. 
There are two native species of this genus, the obvious 
and constant differences between which are altogether op- 
posed to any doubt of their specific distinctness ; the plants 
being hi every stage of development altogether different. 
The name has been given in compliment to J.\Voods,Esq., 
a writer on British Roses, and author of the Tourist's Flora. 
1. Woodsia ilvcnsis, R, Brawn. Oblong Woodsia. 
Fronds pinnate Lanceolate, covered with narrow chaffy 
hair-like scales beneath ; pinnae oblong deeply pinnatifid, 
with bluntly ovate or oblong obtuse lobes ; stipes and 
rachis chaffy. 
WOODSIA ILVEH9IS, R. Brown : Eng. Bot Sup. 2616 : 8m. Eng. 
Fl. iv. 309. Hook and Arn. FL 567: Bah Man. 409: Florig. 
Brit. iv. 45: Newm. 137: Franc. 26. ACBQSTICHUM ILVENSE, 
Linnaeus. POLTPODICM ILVENSE, Swartz. 
