裂羽鳞毛蕨 lie yu lin mao jue

Dryopteris enneaphylla (Baker) C. Christensen var. toyamae (Tagawa) W. C. Shieh.

Plants ca. 60 cm tall. Rhizome ascending, stout, densely scaly. Fronds caespitose, dimorphic; stipe stramineous, (10-) 20-30 cm, densely scaly at base; scales ferruginous, oblong-lanceolate to subulate, membranous, entire, acuminate, lower ones up to 2 cm × 5 mm. Fertile fronds: lamina oblong, 20-30 × 20-25 cm, leathery, rachis with sparse linear and fibriform scales, once imparipinnate; pinnae 5 or 6 pairs, spreading or oblique, remote, lanceolate, ca. 15 × 2 cm, glabrous adaxially, with sparse fibriform scales abaxially, base cordate or truncate, with short stalk, margin deeply pinnatifid to coarsely crenate, apex acuminate; pinna lobes ovate-oblong, apex obtuse or rounded, entire or sparsely dentate, basal segments of pinnae remote, terminal pinna lanceolate, 10-15 cm, base up to 4 cm wide and lobed almost to pinna costa, deeply pinnate upward. Sterile fronds shorter than fertile ones; stipe 10-15 cm; lamina deltoid, 25-30 cm, base 30-40 cm wide; pinnae 4(-7) pairs, spreading, approximate, with short stalk, basal pinnae 15-20 × 2.5-4 cm. Sori scattered on both sides of costa.

Forests on mountain slopes; 2000-2500 m. Taiwan (Hualian, Nantou, Taizhong) [Japan].