西藏实蕨 xi zang shi jue

Rhizome short and robust, ca. 1.5 cm in diam., densely scaly; scales nut-brown, narrowly lanceolate, 4-5 mm, margin entire. Fronds tufted, 80-110 cm; sterile fronds pinnate; stipe stramineous, ca. 25 cm, base 4-5 mm in diam., grooved adaxially, sparsely scaly; lamina sap-green when dry, broadly lanceolate, 50-65 × 25-30 cm, herbaceous, both surfaces glabrous, apex pinnatilobate and elongate to flagelliform, bulbil terminal; rachis not winged, with sparse nut-brown scales; pinnae ca. 15 pairs, alternate, 1-1.5 cm apart, lanceolate, 16-18 × 2.5-3 cm, base truncate, margin with obtuse tooth, apex caudate-acuminate, lower pairs of pinnae shortly stalked, upper pairs basally connate with rachis; veins prominent on both surfaces, forming a costal areole and 3 or 4 rows of tetragonal to hexagonal areoles, without included free veinlets. Fertile fronds 95-115 cm; stipe 50-55 cm; lamina 50-60 × 10-12 cm, apex pinnatilobate; pinnae narrowly lanceolate, 6-8 × 1.5-1.8 cm, base rounded-truncate, apex acuminate. Sporangia inserted throughout abaxial surface.

● Broad-leaved forests; ca. 800 m. Xizang (Mêdog).