1 |
Lamina broadly triangular-lanceolate, widest at base |
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(2) |
+ |
Lamina oblong-lanceolate, often slightly tapering to base |
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(4) |
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2 (1) |
Pinnules becoming pinnate only near base of lamina; indusia somewhat thick, red-brown, persistent. |
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76 D. subimpressa |
+ |
Pinnules mostly pinnate throughout lamina; indusia thin, pale brown or brown, deciduous |
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(3) |
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3 (2) |
Lamina smooth on adaxial surface, ultimate segments rectangular, subentire, stipe base scales glossy and exserted. |
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77 D. marginata |
+ |
Lamina dull, with impressed veins on adaxial surface, ultimate segments acute, serrulate, stipe base scales, adpressed. |
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78 D. caroli-hopei |
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4 (1) |
Lamina markedly dimorphic; fertile lamina usually contracted; indusia strombuliform. |
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72 D. cochleata |
+ |
Lamina monomorphic; fertile lamina usually not contracted; indusia flat |
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(5) |
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5 (4) |
Lamina nearly leathery, with translucent narrow pinnule edges. |
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73 D. porosa |
+ |
Lamina papery, without translucent narrow pinnule edges |
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(6) |
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6 (5) |
Fronds arising from apices of rhizome, pinnules deeply pinnatifid. |
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74 D. pteridoformis |
+ |
Fronds arising from rhizome at intervals, pinnules pinnate. |
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75 D. angustifrons |
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