;"T. harlandii";"T. danangensis";"T. poilanei";"T. fissa" "Frond dimorphism";"Strongly dimorphic";"Mostly semi-dimorphic";Monomorphic;Monomorphic "Number of lateral pinnae/segments";"1–3 pairs";"2–5(6) pairs";"3–4 pairs";"1–5 pairs" "Upper pinnae/segments";"Adnate to rachis, mostly connate with terminal segment at base";"Adnate to rachis, connate with terminal segment or not";"Free, shortly petiolulate or sessile";"Adnate to rachis, connate with terminal segment or not" "Lobes on basal pinnae";Absent;"Present; their bases connate to basal pinnae";"Present; their bases cuneate, sessile or shortly petiolulate";"Mostly present; their bases cuneate or connate" "Wingless petioles of basal pinnae";Absent;"Almost absent, 0–0.5 cm long";"1.2–2 cm long";"0–1.5 cm long" "Transverse veins between lateral veins of pinnae";"Distinct on sterile fronds, absent on fertile fronds";"Variable, mostly indistinct";Absent;Distinct Sori;"Nearly acrostichoid, with sporangia running along veins between lateral veins";"Round; irregularly in 2 rows between lateral veins, close or distant";"Round; regularly in 2 rows between lateral veins, uniformly distant";"Round; irregularly in 4–6 rows between lateral veins, close to each other" Indusia;Absent;Present;Present;Present