南海瓶蕨 nan hai ping jue

Basionym: Trichomanes striatum D. Don, Prodr. Fl. Nepal. 11. 1825; Crepidomanes birmanicum (Beddome) K. Iwatsuki; C. radicans (Swartz) K. Iwatsuki var. naseanum (Christ) K. Iwatsuki; C. striatum (D. Don) Thapa; T. birmanicum Beddome; T. naseanum Christ; T. radicans Swartz var. birmanicum (Beddome) C. Christensen; T. radicans var. naseanum (Christ) Lellinger; T. somae Nakai; Vandenboschia birmanica (Beddome) Ching; V. naseana (Christ) Ching; V. radicans (Swartz) Copeland var. naseana (Christ) H. Itô.

Plants 15-40 cm tall. Rhizome deep smoke-colored, 1-1.5 mm in diam., densely covered with dark brown multicellular hairs, with sparse hairy rootlets. Stipes remote, 2-4 cm apart, light brown, 4-10 cm × 0.8-2.5 mm, glabrous, broadly winged nearly to base. Rachis and costae broadly winged throughout, glabrous. Lamina tripinnate to quadripinnatifid, broadly lanceolate, 8-14 × 2.5-5 cm, membranous, glabrous; pinnae 10-12 pairs, alternate, sessile, spreading, oblong-ovate, 1-2.5 × 0.5-2 cm, base unequally cuneate, apex obtuse; pinnules 3-5 pairs, alternate, sessile, cuneate to obovate, 3-7 × 2.5-6 mm, base decurrent, apex obtuse; ultimate segments simple or forked, narrowly linear, 2-3 × 0.6-0.8 mm, with 1(or 2) veinlets, margin entire, apex rounded. Veins dichotomous, dark green-brown, obviously raised on each surface, glabrous. Sori on upper parts of frond, apical on short acroscopic segments; involucres tubular, ca. 1.5 mm, truncate and not dilated at mouth, narrowly winged, lobes slightly constricted below base of involucre; receptacles projecting, brown, filiform, ca. 3 mm, straight. 2n = 72.

On wet rocks near streams, slopes; (?100-)400-2700 m. Guangdong, Guangxi, Guizhou, Hainan, Sichuan, Taiwan, Yunnan [Bhutan, NE India, Japan, Laos, Myanmar, Nepal, Vietnam].

Trichomanes striatum is now confirmed as an earlier name for the plant formerly called Vandenboschia birmanica (see Ebihara et al., Acta Phytotax. Geobot. 60: 33. 2009).

The names Vandenboschia radicans (Swartz) Copeland (Philipp. J. Sci. 67: 54. 1938; Trichomanes radicans Swartz, J. Bot. (Schrader) 1800(2): 97. 1801) and V. orientalis (C. Christensen) Ching (Fl. Reipubl. Popularis Sin. 2: 187. 1959; T. orientale C. Christensen, Index Filic. 646. 1906) have been misapplied to Chinese plants.