崖姜 ya jiang

Polypodium coronans Wallich ex Mettenius, Abh. Senckenberg. Naturf. Ges. 2: 121. 1856; Drynaria conjugata Beddome (1870), not T. Moore (1862); D. coronans (Wallich ex Mettenius) J. Smith ex T. Moore; D. esquirolii C. Christensen; Pleopeltis coronans (Wallich ex Mettenius) Alderwerelt; Pseudodrynaria coronans (Wallich ex Mettenius) Ching; Polypodium conjugatum Baker (1868), not Poiret (1804), nor Kaulfuss (1827).

Rhizome 2-3 cm in diam. or more; rachises not persistent. Rhizome scales spreading, pseudopeltate, 5-20 × 0.5-1 mm, basal auricles short, margin toothed, apex narrowly acuminate to shortly filiform; midrib absent. Fronds with overlapping bases, monomorphic or with fertile parts slightly narrowed, sessile, dilated base lobed, upward pinnatifid up to 0.2 cm from rachis, 70-170 × 20-45 cm, glabrous; apical pinna present. Pinnae without basal constriction, 15-35 × 1.5-5 cm, margin entire, apex acute to acuminate. Sori usually present on all pinnae, in several rows between midrib and margin, one in each main areole, elongated, 1-3 mm in largest diam., slightly sunken. Sporangia glabrous. Spores verrucate, with spines.

Epiphytic, forming a ring-shaped basket around tree trunks, or epilithic, primary and secondary forests; 100-1900 m. Fujian, Guangdong, Guangxi, Guizhou, Hainan, Taiwan, S Xizang, S Yunnan [India, Japan (Ryukyu Islands), Laos, Malaysia (Peninsular), Myanmar, Nepal, Thailand, Vietnam].

The name Polypodium coronans was first introduced by Wallich (Numer. List, no. 288. 1829) but as a nomen nudum. Likewise "Phymatodes coronans" (C. Presl, Tent. Pterid. 198. 1836) was a nomen nudum. Neither name was therefore validly published (Melbourne Code, Art. 38.1(a)).