台湾亮毛蕨 tai wan liang mao jue

Cystopteris japonica Luerssen var. taiwaniana Tagawa, Acta Phytotax. Geobot. 4: 57. 1935; Acystopteris japonica (Luerssen) Nakai var. taiwaniana (Tagawa) W. C. Shieh.

Rhizome creeping, 2-4 mm in diam., with sparse yellowish brown, broadly lanceolate, thinly membranous scales. Fronds approximate; fertile frond 35-80 cm; stipe chestnut-brown, dull brown, or sometimes stramineous, 15-40 cm, 1-4 mm in diam., grooved adaxially, with sparse scales at base, upward glabrate, shiny or dull; rachis except upper part chestnut-brown; lamina 2- or 3-pinnate, broadly ovate to deltoid-ovate, 18-45 × 12-25 cm, herbaceous or thickly herbaceous, not narrowed to base, base subcordate or truncate, apex shortly acuminate or acuminate; pinnae 10-15 pairs, opposite or subopposite, 3-8 cm apart, spreading or ascending, subsessile or very shortly stalked, basal pair not shorter, oblong or broadly lanceolate; upper pinnae lanceolate, 8-18 × 3-6 cm, base subtruncate, apex acuminate; pinnules 10-15 pairs, sessile, alternate, subequilateral, basiscopic pinnules slightly longer than acroscopic pinnules, basal pair slightly shorter, subopposite, oblong, 0.5-2.5 × 1.5-6 mm, base truncate or broadly cuneate, apex obtuse; costae stramineous or brown; pinnule segments 7-12 pairs, spreading or slightly ascending, oblong, crenate, apex obtuse; veins pinnate in segment, simple, reaching marginal teeth. Orange or yellow small glands borne on abaxial surface and at indusium margin, hyaline multicellular long hairs present on veins, costules, costae, rachis, and stipe. Sori orbicular, abaxial on basal acroscopic veins; indusia small, pale green, broadly ovate, membranous, proximal to sorophore, hidden by sori at maturity, persistent. Spores normal. 2n = 82*.

● Forests in humid valleys; 1600-2600 m. Taiwan.