狭基毛蕨 xia ji mao jue

Cyclosorus clavatus K. H. Shing.

Plants 0.8-1.5 m tall. Rhizomes long creeping, including stipe bases with sparse dark brown lanceolate scales and brown short setae. Fronds distant; stipes 30-60 cm, dark stramineous; laminae 50-90 × 30-40 cm, bases not or slightly narrowed, apices caudate with a large apical pinna; lateral pinnae 4-12 pairs, proximal ones stalked; proximal pair sometimes shortened to ca. 3 cm; middle pinnae lanceolate, 15-22 × 2.5-3.5 cm, bases cuneate, lobed 1/4-1/3 toward costae, apices long acuminate; segments 30-40 pairs on middle pinnae, falcate-triangular, 3-5 × 4-5 mm, obtuse or subacute at apices; veinlets 8-12 pairs, proximal 2 pairs anastomosing with usually an interrupted excurrent veinlet, next 2 or 3 pairs running to sinus membrane. Laminae papery, grayish green when dried, acicular hairy along costae (sometimes also veins) adaxially, abaxially with golden clavate glands and minute hairs along veins. Sori orbicular or slightly elongate, medial or inframedial; indusia with sparse short hairs. Sporangia bearing clavate glands on stalks. Spores with fimbriate wings.

Wet places in dense forests; 600-700 m. Chongqing, Guangxi, Guizhou [Vietnam].