I 
( 45 ) 
GROUP I; GENUS XVI. 
WOODSIA. 
Sori. Circular, situated near the margin of the pin¬ 
nules. Indusium growing from beneath the 
sorus, and split up into hairy, jointed fila¬ 
ments. 
Venules. Free. 
GROUP I ; GENUS XVI; SPECIES I. 
WOODSIA ALPINA. (Alpine Woodsia .) 
Plate. XIX. 
Fronds. Linear, pinnate. Pinnules rather distant, 
bluntly triangular or roundish, and notched 
into distinct, rounded lobes. The fronds have 
a few scattered hairs and scales on the sur¬ 
face. Stipes short, slightly scaly, and jointed 
near the base, at which point the old fronds 
fall off. 
Growth. Erect; in tufts. 
