苍山假毛蕨 cang shan jia mao jue

Dryopteris duclouxii Christ, Bull. Acad. Int. Géogr. Bot. 17: 139. 1907; Thelypteris duclouxii (Christ) Ching.

Plants to 2 m tall. Rhizomes creeping. Fronds remote; stipes ca. 55 cm, with sparse appressed ovate scales, distally with sparse grayish white short hairs; laminae ca. 150 × 35 cm, abruptly narrowed to bases, pinnate-pinnatifid, pinnatifid-acuminate at apices; proximal pairs of pinnae reduced to triangular auricles; middle normal pinnae ca. 45 pairs, obliquely spreading, alternate, sessile, lanceolate, 18-20 × 3-3.5 cm, truncate at bases, pinnatifid to broad wing on both sides of costae, long pinnatifid-acuminate at apices; segments ca. 40 pairs, spreading, proximal one 10-12 × ca. 4 mm, entire or not clearly undulate-crenate, acuminate at apices. Veins evident on both sides, 11-13 pairs of veinlets per segment, proximal pair arising from base of costules, acroscopic veinlet reaching bottom of sinus, basiscopic one reaching margin above sinus. Laminae dark brown when dry, herbaceous; abaxially with dense acicular hairs along rachises, sparsely shortly hairy along costae and veins, adaxially densely appressed-setaceous along costal grooves, sparsely setaceous along veins and margins, glabrous on both surfaces on intercostal areas. Sori orbicular, attached above middle of veinlets and close to margins; indusia small, orbicular-reniform, brownish, thickly membranous, glabrous, persistent.

● Streamsides. W Yunnan (Dali: Cangshan).