巢形鳞毛蕨 chao xing lin mao jue

Polystichum transmorrisonense Hayata, J. Coll. Sci. Imp. Univ. Tokyo 30: 427. 1911; Aspidium filix-mas (Linnaeus) Swartz var. nidus (Baker) Christ; Ctenitis contigua Ching; C. crassirachis Ching; C. crenata Ching; C. dentisora Ching; C. nidus (Baker) Ching; C. silaensis Ching; C. submariformis Ching & Chu H. Wang; C. transmorrisonensis (Hayata) Tagawa; C. wantsingshanica Ching & K. H. Shing; C. zayuensis Ching & S. K. Wu; Dryopsis contigua (Ching) Holttum & P. J. Edwards; D. crassirachis (Ching) Holttum & P. J. Edwards; D. crenata (Ching) Holttum & P. J. Edwards; D. dentisora (Ching) Holttum & P. J. Edwards; D. nidus (Baker) Holttum & P. J. Edwards; D. silaensis (Ching) Holttum & P. J. Edwards; D. submariformis (Ching & Chu H. Wang) Holttum & P. J. Edwards; D. transmorrisonensis (Hayata) Holttum & P. J. Edwards; D. wantsingshanica (Ching & K. H. Shing) Holttum & P. J. Edwards; Dryopteris crassirachis (Ching) Li Bing Zhang; D. filix-mas (Linnaeus) Schott subsp. nidus (Baker) C. Christensen; D. leiboensis Li Bing Zhang; D. nidus (Baker) Li Bing Zhang; D. nokoensis Tagawa; D. nushanensis Li Bing Zhang; D. submariformis (Ching & Chu H. Wang) Li Bing Zhang; D. wantsingshanica (Ching & K. H. Shing) Li Bing Zhang; Lastrea filix-mas (Linnaeus) C. Presl subvar. nidus (Baker) Beddome; L. filix-mas var. nidus (Baker) Beddome; Nephrodium apiciflorum (Wallich ex Mettenius) Hooker var. nidus (Baker) C. B. Clarke; N. filix-mas (Linnaeus) Richard var. nidus Baker.

Rhizomes erect. Stipe stramineous to reddish brown, 15-26 cm; stipe scales blackish brown, lanceolate, 5-12 × 0.5-1 mm. Lamina 2-pinnate, lanceolate, 28-65 × 10-19 cm; free lateral pinnae 16-35 pairs, ± spaced; basal pinnae shortened or not, 4-10 × 1.5-2 cm, reflexed or not; middle pinnae 5.5-10 × 1.2-2.2 cm; pinnules entire to crenate at lateral margins, hyaline margins lacking, obtuse or subtruncate and crenate to serrate at apex. Rachises and costae abaxially covered with many scales, scales on costae lanceolate or ovate; costules without scales. Veins of pinnules pinnate, hairs, glands, or gland-hairs on veins present or not. Sori in middle, or sometimes confined to distal half of pinnules, separate, medial. Indusia distinct and persistent, entire or erose at margin, glands on indusia present or not. Perispore echinate.

Forests, thickets; 2000-3900 m. Guizhou, Sichuan, Taiwan, Xizang, Yunnan [Bhutan, NE India, E Nepal].

Some characters of Dryopteris transmorrisonense vary immensely, e.g., pinnules entire to distinctly crenate or lobed halfway, pinnules closely set to separated 1-2 mm apart, sori medial to marginal on pinnules, indusia entire to erose, glands present on abaxial surface of veinlets and indusia or absent.

Some authors (e.g., Knapp, Ferns Fern Allies Taiwan, 166. 2011; Li Bing Zhang, Phytotaxa 71: 23. 2012) recognize differences between Dryopteris nidus and D. transmorrisonense. Despite the name D. nidus, a more perfect "nest-plant" is D. clarkei. As a result, the two names are easily confused. Dryopteris clarkei is easily recognized by its hyaline pinna margins.