根叶刺蕨 gen ye ci jue

Gymnogramma rhizophylla Kaulfuss, Enum. Filic. 78. 1824; Egenolfia rhizophylla (Kaulfuss) Fée; Polybotrya duplicatoserrata Hayata.

Rhizome shortly creeping, 4-6 mm in diam., with 2 or 3 rows of fronds, densely scaly; scales brown, ovate-lanceolate, subclathrate. Fronds close together; sterile fronds pinnate, 20-90 cm; stipe 10-20 cm, base 2-3 mm in diam.; lamina green to blackish, dark green when dry, lanceolate, pinnate, 40-80 × 5-13 cm, herbaceous, both surfaces glabrous; stipe and lower side of basal part of rachis usually with small, blackish, spreading scales; terminal segment 1-6 cm; rachis with a narrow wing except for lowest part; pinnae 20-35 pairs, alternate to opposite, sessile, up to 3.5 cm apart, elliptic-lanceolate, 2.5-4 × 1-1.5 cm, base rounded-truncate, ± symmetrical, margin finely serrate, or serrately lobed to 1/3 toward costa, apex rounded or acuminate, lowermost 2 pinnae deflexed or not; veinlets 2-4 pairs, simple pinnate. Fertile fronds 16-30 cm; lamina lanceolate, 16-20 × 1.5-2.5 cm, widest usually near middle; pinnae 20-25 pairs, ca. 1.5 cm apart, elliptic, 6-12 × 3-4 mm, margin entire or irregularly undulate, apex obtuse. Sporangia inserted throughout abaxial surface. 2n = 82*.

● On rocks in dense forests; 200-1000 m. Taiwan.