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Fronds fan-like, sori placed on each side 
of the narrow segment of the frond, linear, 
elongated, opening towards the midrib. 
Genus -XXVI, —Actiaiopteris Liak 
Tripe IX .—ASPIDIEZ 
Indusium more or less rounded or 
kidney-shaped (rarely elliptical), attached 
either by the centre or sinus. 
Sori elliptical on the tip of a veinlet but 
within the margin. Indusium attached 
longitudinally on the centre of the linear 
receptacle, free all round the edge. Veins 
pinnate, the lower pair of veinlets anasto- 
mosing. Fronds bipinnatifid. 
Genus XXVII. —Mesochleua R. Br. 
Sori globose; veins free; texture lea- 
thery, teeth awned. 
Geaus XXVIII._—Polystichum Roth, 
Indusium round, attached by the 
centre ; veins generally anastomosing with 
free veinlets proceeding from their junc- 
tion. Genus XXIX —Cyrtomium Presl. 
Veins copiously: anastomosing with free 
included veinlets in the areoles. Sori 
ound. Indusium round or kidney-shaped. 
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