1. Dryopteridaceae (鳞毛蕨科)
2. Polystichum (耳蕨属)
3. Polystichum pianmaense (片马耳蕨)

1. Dryopteridaceae (鳞毛蕨科)
2. Polystichum
3. Polystichum pianmaense (片马耳蕨)

1. Dryopteridaceae
2. Polystichum
3. Polystichum pianmaense

1. Dryopteridaceae
2. Polystichum
3. Polystichum pianmaense

1. Dryopteridaceae
2. Polystichum pianmaense (片马耳蕨)

1. Dryopteridaceae (鳞毛蕨科)
2. Polystichum (耳蕨属)
3. Polystichum pianmaense (片马耳蕨)

1. Dryopteridaceae
2. Polystichum
3. Polystichum pianmaense

Plants evergreen. Rhizome erect or ascending, short, densely covered with linear brown scales. Fronds up to 80 cm; stipe yellowish brown, 11-32 cm, 4-6 mm in diam. at base, densely covered with linear and lanceolate and larger scales; large scales somewhat sparse, bicolorous, blackish brown to dark brown at center and brown on margin, shiny, ovate and ovate-lanceolate, up to 14 × 7 mm, subentire or serrulate, caudate. Lamina bipinnate, oblong-lanceolate or oblong, up to 27-60 × 11-24 cm near base, not or slightly contracted toward base, apex caudate, sterile; rachis without proliferous bulbils, abaxially densely covered with linear, lanceolate, brown scales and larger scales; large scales dense or somewhat sparse, blackish brown to dark brown, shiny, ovate-lanceolate and broadly lanceolate, up to 9 × 5 mm, densely serrulate, caudate. Pinnae 23-26 pairs, alternate, slightly ascendant, shortly stalked, lanceolate, bases not contracted, asymmetrical, apices caudate; lower pinnae 7-10 × 1.7-2 cm, 1-pinnate; costa abaxially covered with linear brown scales, adaxially sulcate. Pinnules 16-25 pairs, alternate, subsessile, oblong, 0.8-1 × 0.3-0.4 cm, bases cuneate, acroscopic margins entire, not spinulose, exauriculate, basiscopic margins shortly spinulose, apices acute and mucronate; basal acroscopic pinnules largest, incised; both surfaces densely covered with long-filiform microscales; frond texture papery; venation pinnate, lateral veins 5-7 pairs, dichotomous, distinct. Sori small, 1-3 pairs per pinnule, in 1 row on each side of midrib, close to midrib, terminal on veinlets; indusia present, brown, small, membranous, not well developed, irregularly erose.

Forests; 2200-2600 m. Xizang (Mêdog, Zayü), Yunnan (Gongshan, Lushui).

92．片马耳蕨（云南植物研究）图版26：1-3

Polystichum pianmaense W. M. Chu in Acta Bot. Yunnan. Suppl. V: 51. f. 30. 1992; L. B. Zhang et H. S. Kung in Acta Phytotax. Sinica 34 (1): 73. 1996.

植株高达80厘米。根状茎短而直立或斜升，密生线形棕色鳞片。叶簇生；叶柄长11-32厘米，基部直径4-6毫米，黄棕色，腹面有纵沟，密生线形、披针形和较大鳞片，大鳞片卵形和卵状披针形，二色，中间黑棕色至深棕色，具光泽，较疏生，长达14毫米，宽达7毫米，先端尾状，边缘近全缘或具细齿；叶片矩圆状披针形或矩圆形，长27-60厘米，近基部宽11-24厘米，先端尾状，不育，基部不变狭或略狭不育，二回羽状；羽片23-26对，互生，斜向上，具矩柄，披针形，先端尾状，基部不变狭，不对称，下部羽片长7-10厘米，宽1.7-2.0厘米，一回羽状；小羽片16-25对，互生，近无柄，矩圆形，长0.8-1.0厘米，宽0.3-0.4厘米，先端急尖，具短尖头，基部楔形，上侧全缘无芒，不具耳状凸，下侧具短芒，羽片基部上侧一片最大，具缺裂；小羽片具羽状脉，侧脉5-7对，二歧分叉，明显。叶草质，两面密生长纤毛状小鳞片；叶轴腹面有纵沟，背面密生棕色线形、披针形鳞片和较大鳞片，大鳞片卵形和卵状披针形，黑棕色至深棕色，具光泽，密生或略疏生，长达9毫米，宽达5毫米，先端尾状，边缘具密集小齿；羽轴腹面有纵沟，背面具棕色线形鳞片。孢子囊群圆形，小而不明显，早落，每小羽片1-3对，主脉两侧各一行，靠近主脉，生于小脉末端；囊群盖圆形，盾状，小，褐色，膜质，发育不好，边缘不规则齿裂。

我国特有种，产云南（泸水）、西藏（墨脱、察隅）。生林下，海拔2200-2600米。模式标本采自云南泸水片马。