“…The family is characterized by: creeping rhizomes, ascending, or erect, scales at apices; these usually noncalthrate, glabrous, glandular, or ciliate, petioles with two elongate or crescent‐shaped vascular bundles facing one another, blades monomorphic; rarely dimorphic, veins pinnate or forking; free, sori abaxial; round J‐shaped, or linear with reinform, monolete, perine winged, ridged or spiny (Smith et al, ). The family has been variously circumscribed and its limits are still uncertain (Hasebe et al, ; Liu, Chiou, & Kato, ; Wang, Chen, Zhang, Lu, & Zhao, ; Wei, Schneider, & Zhang, ). In Pakistan, the family is represented by 23 species belonging to 3 genera and it is commonly distributed in Himalayan and Northern region of Pakistan (Nakaike & Malik, ; Stewart, ; Stewart, Ali, & Nasir, ).…”