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29. Oreogrammitis Copeland, Philipp. J. Sci., C. 12: 64. 1917.
滨禾蕨属 bin he jue shu
Authors: Shannjye Moore & Barbara S. Parris
Plants small, epiphytic, seldom petrophytic. Rhizomes dorsiventral, with stipes in 2 rows; scales not clathrate, brown or reddish brown, glabrous. Stipe articulate or not, phyllopodia present or not. Lamina usually entire, rarely slightly crenulate; veins simple or 1- or 2-forked, free, vein endings sometimes with a hydathode on adaxial surface of lamina. Sori usually superficial or slightly sunken in shallow depressions on lamina, sometimes deeply sunken, on acroscopic vein branch unless veins simple, in 2 rows, 1 on each side of midrib. First-developed sporangia usually with 1-4 simple hairs at apex adjacent to annulus, rarely glabrous; later-developed sporangia glabrous. Hairs usually simple eglandular, either solitary or tufted, and rarely 1- or 2-forked with eglandular branches.
About 110 species: Sri Lanka and China to Australia and Pacific islands; seven species (two endemic) in China.
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| 1 |
Mature lamina glabrous in apical half, or only with very sparse hairs |
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(2) |
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Mature lamina with hairs in apical half, at least on midrib |
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(3) |
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| 2 (1) |
Sori superficial, or slightly sunken; sporangia setose. |
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1 O. adspersa |
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Sori deeply sunken; sporangia glabrous. |
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5 O. nuda |
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| 3 (1) |
Lateral veins distinct. |
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6 O. reinwardtii |
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Lateral veins hidden |
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(4) |
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| 4 (3) |
Lamina usually less than 6 cm; stipe usually less than 1 cm |
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(5) |
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Lamina usually more than 8 cm; stipe more than 1 cm |
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(6) |
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| 5 (4) |
Stipe hairs dark reddish brown, 0.1-0.2 mm. |
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3 O. dorsipila |
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Stipe hairs pale to dark red-brown, 0.2-1.8 mm. |
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7 O. sinohirtella |
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| 6 (4) |
Stipe hairs up to 1.2 mm; lateral veins 1- or 2-forked, acroscopic branch extending beyond sorus. |
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2 O. congener |
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Stipe hairs up to 0.5 mm; lateral veins 1-forked, acroscopic branch not extending beyond sorus. |
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4 O. hainanensis |
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Lower Taxa
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