Douglasiane. N. O Filices. 
DCCCCLYV. 
CysTopTeris Dove.asii, Hook. 
Parva, frondibus membranaceis firmis glabris oblongo-lan- 
ceolatis pinnatis, pinnis inferioribus latioribus subovatis 
acuminatis acutiusculis pinnatifidis, lobis lato-oblongis 
ovatisve obtusis obtusedentatis, superioribus oblongo- 
lanceolatis obtusis lobato-pinnatifidis decurrentibus coa- 
dunatisque, soris majusculis, involucris reticulatis suborbicu- 
laribus dentatis cito capsularum pressione reflexis, stipite 
brevi. 
Cystopteris Douglasii, Hook. Gen. Fil. 1, p. 200. 
Has. Sandwich Islands, D. Douglas. 
Stipes short, naked. Frond firm, rather rigid, of a dark, 
lurid green colour in the dried state. The form of the pine 
and segments approaches that of the N, American C. bulbifera, 
but they are broader and much less compound. The 
fructification, though much advanced in our specimens, is 
clearly that of the present genus. 
Fig. 1. Upper pinne, seen from above. Jf. 2. lower pinne, 
fertile, seen from beneath. f. 3. Sorus :—magnified. 
