248 



FERNS : BRITISH AND FOREIGN. 



deltoid, 6-18 inches high ; pinnaa distant, pinnate below, pin- 

 natifid decurrent above; pinnules lanceolate, pinnatifid or 

 sinuose lobed. Veins uniform, reticulated ; areoles transverse 

 oblong ; marginal veinlets free, exserted beyond the margin, 

 bearing a globose pediculate sorus. Indusium calyciform, 

 spreading, entire. 



1 T. Moorei, J. Sm. ; Lowe's Ferns, 8, t. 37. Deparia 

 Moorei, Hook. Journ. Bot. and Kew Gard. Misc. v. 4, 

 t. 3 ; Hook. Fit. Fxot. t. 28. Cionidium Moorei, 

 Moore, Ind. — New Caledonia. 



** Veins free. 



f Sori indusiate, 



§ 3. Oreopterice. Sori punctiform, Indusium orbicular or 

 reniform, plane or cucullate, rarely calyciform. 



a. Indusium orbicular or reniform. 

 74. POLYSTICHTJM, Both (in part); Schott; Presl. 



Vernation fasciculate and erect, or urjiserial and subsar- 

 mentose. Fronds pinnate, bi-tripinnate, or decompound ; pinna? 



Genu? 74.— Portion of mature frond, under side. No. I. 



and pinnules auriculated and lobed, dentate, rigid, spinulose, 

 mucronate. Veins simply or pinnately forked ; venules free, the 

 lower exterior branch or more (of each fascicle) soriferous on, or, 



