Rhizome 4-6 mm thick, internodes to 1.5-3.5 cm long; vascular strands with bundle sheath fully sclerified; sclerenchyma strands few to many, mainly around the vascular cylinder. Rhizome scales peltate, appressed, 3.5-6 by 1.6-3.4 mm, acute, brown (with a large dark spot at the attachment), evenly coloured or with a lighter margin, entire to remotely and weakly dentate (sometimes irregularly lacerate). Fronds simple, dimorphic. Fertile fronds with stipe 14-30 cm long; lamina 7-13 by 1.9-3.5 cm, index 2-4.7, widest at 0.2-0.4 from base. Sterile fronds with stipe 3.5-27 cm long; lamina 5.5-14 by 4-12.3 cm, index 1.4-2.3, widest at 0.3-0.4 from base; base mostly truncate, apex rounded, rarely acute. Venation: main veins on upper surface not raised, distinct. Hydathodes absent. Margin cartilaginous, thickened; notches present, in fertile fronds absent to sporadically present. Sori in transverse coenosori, confluent across connecting veins, singly between adjacent main veins, 3 mm wide, superficial.
Home