中间节肢蕨 zhong jian jie zhi jue

Rhizome ca. 10 mm in diam., densely scaly; scales brown, lanceolate, ca. 10 mm, margin entire, apex acuminate. Stipe stramineous, ca. 20 cm, glabrous; lamina imparipinnate, oblong or broadly lanceolate in outline, 30-40 × 20-25 cm; pinnae 6-8 pairs, subopposite, sessile, spreading, ovate-lanceolate, 15-20 × 5-4 cm, fertile pinnae slightly contracted, base rounded, margin entire, apex acuminate; lamina herbaceous, abaxially pale or glaucous, adaxially green, both surfaces glabrous. Sori orbicular or elliptic, in 1 row along each side of costa, medial, usually in confluent pairs.

● Epilithic; ca. 2000 m. Xizang.