峨眉钩毛蕨 e mei gou mao jue

Polypodium omeiense Baker, J. Bot. 26: 229. 1888; Cyclosorus omeiensis (Baker) C. M. Kuo; Dryopteris omeiensis (Baker) C. Christensen; Glaphyropteris omeiensis (Baker) H. Itô; Lastrea omeiensis (Baker) Copeland; Leptogramma omeiensis (Baker) Tagawa; Nephrodium omeiense (Baker) Diels; Thelypteris omeiensis (Baker) Ching.

Plants 60-70 cm tall. Rhizomes long creeping. Fronds remote; stipes 15-20 cm, subglabrous above bases; laminae oblong-lanceolate, 45-50 × ca. 20 cm, tapering to bases, pinnate-pinnatifid, acuminate and pinnatifid at apices; pinnae 25-28 pairs, alternate, obliquely spreading, sessile, proximal 2 or 3 pairs of pinnae clearly shortened, proximal pair of pinnae only ca. 1 cm or shorter; middle pinnae linear-lanceolate, 9-12 × ca. 2 cm, bases not tapering and rounded-truncate, symmetrical, pinnatifid nearly to costae, apices long acuminate with 1.5-2 cm tail; segments 15-22 pairs, falcate-lanceolate, 7-12 × 3-4 mm, entire, obtuse or acute at apices. Veins evident abaxially, veinlets simple, 11 or 12 pairs per segment, proximal pair arising above base of costules and all reaching margins above sinus. Laminae papery, brownish when dry, abaxially with sparse thick long acicular hairs along costae, slightly shortly hairy along costules, adaxially with dense short acicular hairs along grooves and mixed hooked thick long hairs, with similar hairs along costules; rachises with denser thick long hairs, pinnae with brown aerophores at bases abaxially. Sori small, orbicular, dorsifixed below middle of veinlets and close to costules, 10 or 11 pairs per segment; sporangia glabrous.

● Grassy slopes, streamsides in forests; 900-1700 m. Sichuan, Yunnan.