Tectaria laotica  

Rhizome short, erect, bearing a tuft of fronds at apex, densely scaly; scales basifixed, concolorous, deep castaneous, 4–8 × 1–2 mm, lanceolate, apex acuminate, margin entire. Fronds monomorphic, bipinnatifid or bipinnate at base, unipinnate to bipinnatifid upwards, the lower pinnae sometimes bipinnate; stipes castaneous to purplish, polished, grooved, 25.0–85.0 cm long, covered with a few short hairs throughout, scaly at nearly base; lamina ovate-oblong, 32.0–70.0 × 22.0–40.0 cm, basal pinnae 20.0–35.0 × 11.0–18.0 cm, subopposite, stalked, stalk 1.0–5.0 cm long, ovate-oblong in outline; basal pinnule 13.0–30.0 × 2.0–5.5 cm, lanceolate or linear-lanceolate, often falcate, apex acuminate, base asymmetrically cuneate, margin subentire to broadly shallowly lobed, lobes oblong-ovate, apex obtuse, margin entire; apical pinnule 10.0–21.0 × 2.0–3.0 cm, lanceolate, apex acuminate, base asymmetrically cuneate, margin entire to slightly crenate; terminal pinnule 15.0–25.0 × 5.0–17.0 cm, ovate-subtriangular, apex acuminate, base asymmetrically cuneate, margin trilobed, central lobe 18.0–24.0 × 3.0–5.0 cm, lanceolate or linear-lanceolate, apex acuminate, base oblique, margin entire to broadly shallowly lobed, pairs of lateral lobes 13.0–22.0 × 1.5–3.0 cm, linear-lanceolate, apex acuminate, base oblique or fused with costa, margin entire to slightly crenate; lateral pinnae 2–3 pairs, alternate or subopposite, stalked at lower pinnae and subsessile upwards, stalk 0.5–2.0 cm long, 12.0–40.0 × 2.5–13.0 cm, lanceolate or linear-lanceolate, often falcate, apex acuminate, base asymmetrically acute to cuneate, margin subentire to broadly shallowly lobed, long acroscopic lobe often present, 10.0–13.0 × 1.0–1.5 cm, linear-lanceolate, apex acuminate, margin subentire, basal pinnule 2.5–3.0 × 1.0–1.5 cm, if present, lanceolate, sessile, apex acute to obtuse, base subtruncate, margin entire, interval 10.0–13.0 cm; terminal pinna 15.0–34.5 × 11.0–21.0 cm, ovate-lanceolate, apex acute, base acute or slightly cuneate, margin subentire or trilobed, central lobe 12.0–30.0 × 2.5–7.5 cm, lanceolate, apex acute to acuminate, subentire to shallowly lobed, pairs of lateral lobes 5.0–18.0 × 1.5–3.0 cm, lanceolate, often falcate, apex acute to acuminate, subentire to shallowly lobed; papyraceous to chartaceous, glabrous on both surface except few short hairs on sinus, midrib and main veins, veins fully anastomosing forming irregular areoles with free included veinlets, veinlets free, simple or forked, costal areoles having free branched included veinlets. Sori round, terminal on free included veinlets or dorsal on anastomosing veins, usually marginal and confined to the apical margin of lobes, indusia round-reniform, thin, dorsifixed, persistent.