单叶凤尾蕨 dan ye feng wei jue

Pteris pellucida C. Presl f. simplex Hooker; P. subsimplex Ching.

Plants 30-40 cm tall. Rhizome erect, short, ca. 1.5 cm in diam., scaly at growing tips. Fronds dimorphic, simple or 2- or 3-forked; stipe straw-colored to light brown, slightly lustrous, 15-20 cm × ca. 2 mm, glabrous. Sterile fronds: lamina (or pinnae) lanceolate, ca. 20 × 2.5-3 cm, base broadly cuneate or subobtuse, margin subcartilaginous, undulate, serrate upward, apically shortly serrulate, apex acuminate. Fertile fronds (or pinnae) linear-lanceolate, ca. 20 × 1-2 cm, entire, apex sterile, slightly serrulate. Lamina pale green, papery when dried, glabrous; midvein straw-colored, convex abaxially; veins simple or 2-forked.

Common in ravines, bamboo forests; 100-200 m. SE Yunnan (Hekou) [N Vietnam (Lao Cai)].