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12. Polystichum sect. Sorolepidium (Christ) Tagawa, Acta Phytotax. Geobot. 9: 122. 1940.
高山耳蕨组 gao shan er jue zu
Sorolepidium Christ, Bot. Gaz. 51: 350. 1911; Polystichum sect. Lasiopolystichum Daigobo; P. ser. Moupinensia H. S. Kung & Li Bing Zhang.
Plants small, summer-green. Upper part of rhizome often with persistent stipe bases. Lamina 1-pinnate, lanceolate or elliptic-lanceolate. Pinnae deeply or shallowly pinnatifid. Pinnae ovate, deltoid, or oblong, indistinctly toothed, mucronate. Microscales linear or lanceolate. Sori abaxial or terminal on veinlets. Indusia large, membranous, erose.
About 16 species: alpine regions in Asia; 13 species (seven endemic) in China.
The currently defined Polystichum sect. Sorolepidium is comparable to P. ser. Moupinensia H. S. Kung & Li Bing Zhang, only a part of P. sect. Lasiopolystichum sensu H. S. Kung & Li Bing Zhang in FRPS (5(2): 60. 2001). Molecular data (Liu et al., Chin. Sci. Bull. 52: 631-638. 2007) show that Sorolepidium is nested within Polystichum.
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1 |
Basalmost pinnae pinnatilobate or pinnatifid but not pinnatipartite |
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(2) |
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Basalmost pinnae pinnatipartite and with 1-7 nearly free lobes dissected nearly to midrib |
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(5) |
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2 (1) |
Stipe and rachis with light brown scales and scales with blackish brown centers. |
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55 P. paramoupinense |
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Stipe and rachis scales light brown |
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(3) |
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3 (2) |
Rachis often subglabrous; pinnae glabrous adaxially. |
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52 P. lachenense |
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Rachis with dense scales; pinnae with lanceolate microscales adaxially |
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(4) |
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4 (3) |
Indusia exindusiate. |
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53 P. glaciale |
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Indusia indusiate. |
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54 P. duthiei |
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5 (1) |
Only pinnae of lower part of lamina with 1 or 2 pairs of free lobes dissected to midrib |
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(6) |
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Pinnae with more than 3 pairs of free lobes dissected to midrib |
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(8) |
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6 (5) |
Stipe and rachis with light brown scales and scales with blackish brown centers; pinnae below middle of lamina ovate or oblong. |
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56 P. castaneum |
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Stipe and rachis scales concolorous; pinnae below middle of lamina deltoid-ovate or ovate |
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(7) |
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7 (6) |
Stipe stramineous, sometimes brown at base; pinnae acute or acuminate at apex. |
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57 P. moupinense |
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Stipe brown; pinnae obtuse or rounded at apex. |
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58 P. habaense |
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8 (5) |
Stipe brown, with brown scales and scales with blackish brown centers. |
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59 P. melanostipes |
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Stipe stramineous |
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(9) |
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9 (8) |
Stipe and rachis with light brown scales and scales with blackish brown centers |
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(10) |
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Stipe and rachis scales concolorous |
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(11) |
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10 (9) |
Pinnae oblong or ovate, obtuse or rounded at apex. |
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63 P. salwinense |
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Pinnae narrowly deltoid or narrowly ovate, acute at apex. |
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64 P. nigrum |
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11 (9) |
Stipe and rachis scales yellowish brown to fulvous. |
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60 P. integrilobum |
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Stipe and rachis scales brown |
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(12) |
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12 (11) |
Lamina 11-30 cm; indusia flat. |
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61 P. shensiense |
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Lamina 8-12 cm; indusia arc-shaped. |
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62 P. taizhongense |
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List of lower taxa
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