节状毛蕨 jie zhuang mao jue

Nephrodium articulatum Houlston & T. Moore, Gard. Mag. Bot. 3: 293. 1851; Christella euphlebia (Ching) Holttum; Cyclosorus euphlebius Ching; C. laetestrigosus (C. B. Clarke) Ching; C. nigrescens Ching ex K. H. Shing; C. transitorius Ching ex K. H. Shing; C. yunnanensis Ching ex K. H. Shing; N. glandulosum J. Smith var. laetestrigosum C. B. Clarke; Pronephrium articulatum (Houlston & T. Moore) Holttum; Thelypteris articulata (Houlston & T. Moore) Tagawa & K. Iwatsuki; T. euphlebia (Ching) C. F. Reed.

Plants 0.6-1.5 m tall. Rhizomes massive, shortly creeping, including stipe bases with brown ovate-lanceolate scales and brown setae. Fronds clustered to approximate; stipes 20-60 cm, bases blackish brown, dark stramineous distally with setae; laminae 40-100 × 20-40 cm, bases slightly narrowed, apices acuminate to caudate; lateral pinnae 10-25 pairs, proximal 1 or 2 pairs slightly shortened, shortly stalked, bases cuneate and decurrent; middle pinnae almost sessile, sterile pinnae 15-20 × 2-5 cm (fertile ones narrower), lanceolate, bases rounded-truncate, lobed to 1/4 toward costae or shallowly serrate, apices acuminate or caudate; aerophores beneath pinna bases slightly swollen; segments/serrations 25-40 pairs on middle pinnae, triangular, 1-3 × ca. 3 mm, obtuse at apices; veinlets 6-12 pairs, proximal 2-6 pairs anastomosing with usually interrupted excurrent veinlet, next 1-3 pairs to prominent sinus membrane. Laminae papery, brownish green or reddish green when dried, adaxially with brown or pale setae along costae, abaxial surface with sparse setae along costae and veins (sometimes also between veins). Sori orbicular, medial or supramedial; indusia glabrous. Sporangia bearing minute light yellow glands on stalks. Spores brown, echinate.

Wet places in forests, forest margins; 200-1100 m. Guangxi, S Guizhou, SE Xizang, S Yunnan [India, Sri Lanka, Thailand, Vietnam].