石门毛蕨 shi men mao jue

Cyclosorus wangmoensis K. H. Shing & P. S. Wang.

Plants 40-100 cm tall. Rhizomes shortly creeping, with dark brown lanceolate scales and setae. Fronds approximate; stipes 20-50 cm, dark stramineous; laminae 20-50 × 12-30 cm, bases slightly narrowed, apices acuminate to caudate; pinnae 10-15 pairs, shortly stalked, proximal 1 or 2 pairs sometimes slightly shortened; middle pinnae falcate-lanceolate, 8-15 × 1.5-2.5 cm, bases rounded-cuneate (decurrent on proximal pinnae), lobed 2/3-3/4 toward costae, apices long acuminate; segments 20-30 pairs on middle pinnae, proximal segments shortened or missing on proximal pinnae; middle segments falcate-lanceolate, 4-10 × 3-4 mm, obtuse or subacute at apices; veinlets 6-12 pairs, proximal pair anastomosing, excurrent veinlets usually obsolete on basal segments, next 0.5-1 pair running to sinus membrane. Laminae papery, grayish green when dried, with short acicular hairs along costae and veins and minute hairs between veins adaxially, shortly hairy throughout abaxially. Sori small, medial or supramedial; indusia shortly hairy. Sporangia with reddish orange glands on stalks. Spores dark brown, sparingly cristate.

● Wet places in forests, semi-open forest margins; 300-1000 m. Chongqing, Guizhou, Hunan.

The epithet was misspelled as "simenensis" in FRPS (4(1): 171, 195. 1999).

The types of Cyclosorus sinodentatus Ching & Z. Y. Liu and C. macrophyllus Ching & Z. Y. Liu both have features intermediate between C. shimenensis and C. dentatus. There are only a few gatherings of C. sinodentatus other than the type. They are all rarely fertile. Cyclosorus macrophyllus is represented by only one gathering (the type), lacking fertile sori. These two taxa might be hybrids.