焕镛钩毛蕨 huan yong gou mao jue

Thelypteris chunii Ching, Bull. Fan Mem. Inst. Biol., Bot. 6: 284. 1936.

Plants 70-105 cm tall. Rhizomes strong, long creeping, nearly black, including stipe bases with brown triangular-lanceolate scales and grayish white short hairs. Fronds subapproximate; stipes 30-50 cm, bases dark brown, distally stramineous, subglabrous; laminae oblong-lanceolate, 40-55 × 20-25 cm, pinnae not deflexed at bases, pinnate-pinnatifid, acuminate and pinnatifid at apices; pinnae 12-18 pairs, alternate, obliquely spreading, or proximal ones opposite, spreading, sessile, linear-lanceolate, 10-15 × 2-3 cm, bases slightly tapering, rounded-truncate, pinnatifid to 3/4 of distance to costae, apices shortly caudate-acuminate; segments 16-20 pairs, oblong-lanceolate, 8-12 × 4-7 mm, entire, rounded-obtuse at apices. Veins not evident, veinlets simple, 10-11 pairs per segment, proximal pair arising from slightly higher above base of costules, or basiscopic veinlets arising from base of costules and all reaching margins above sinuses. Laminae thinly herbaceous, when dry brownish green, abaxially with acicular short hairs along costae and costules, adaxially with short hairs along costal grooves, rachises with dense hooked hairs, pinna bases abaxially with deep brown, linear-lanceolate or linear-bent aerophores. Sori small, orbicular, attached below middle of veinlets and slightly close to costules, 7-10 pairs per segment; sporangia each with 1 or 2 short setae near top of annuli.

● On rocks in forests in mountain valleys. SW Guangdong (Xinyi).