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FOC | Family List | FOC Vol. 2-3 | Dryopteridaceae | Polystichum

158. Polystichum balansae Christ, Trudy Imp. S.-Peterburgsk. Bot. Sada. 28: 193. 1908.

巴郎耳蕨 ba lang er jue

Cyrtomium balansae (Christ) C. Christensen; C. balansae f. edentatum Ching ex K. H. Shing; C. kwantungense Ching; Polystichum anomophyllum (Zenker) Nakai var. miyajimense (Kodama) Nakai; P. miyajimense Kodama.

Plants evergreen. Rhizome erect, densely covered with lanceolate brown scales. Fronds 25-60 cm; stipe stramineous, 12-35 cm, 2-4 mm in diam. at base; basal stipe scales brown, narrowly ovate and lanceolate, with small teeth; distal stipe scales similar but smaller, gradually sparser toward lamina apex. Lamina 1-pinnate, lanceolate or broadly lanceolate, 16-42 × 6-15 cm, slightly contracted at base, acuminate; rachis scaly; scales brown, lanceolate and linear, curled. Pinnae 12-18 pairs, alternate, slightly ascendant, shortly stalked, falcate-lanceolate, lower pinnae 3.5-9 × 1.2-2 cm, bases oblique, acroscopic margins truncate and with acute auricles, basiscopic margins cuneate, margins with small forward-pointing blunt (rarely acute) teeth or sometimes entire or only distal margins with few incisions, apices acuminate or nearly caudate; adaxially glabrous, abaxially with lanceolate brown microscales; frond texture thinly leathery; venation pinnate, slightly raised abaxially, indistinct adaxially, veinlets anastomosing to form 2 rows of areoles, each areole with 1 or 2 included veinlets. Sori in 2 rows on each side of midrib; indusia present, entire.

Acidic soils in evergreen forests; 100-1600 m. Anhui, Fujian, Guangdong, Guangxi, E and SE Guizhou, Hainan, Hunan, Jiangxi, Zhejiang [Japan, Vietnam].

Polystichum balansae is a sexual diploid.


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