| WebNameShort | |
| Grammatophora macilenta W. Smith 1856 |
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| Himantidium majus (major) W. Smith 1856 |
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| Himantidium majus (major) var. bidens (Gregory) W. Smith 1856 |
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| Himantidium soleirolii sense Wm. Smith 1856 |
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| Himantidium undulatum (Ralfs) W. Smith 1856 |
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| Himantidium williamsonii W. Smith 1856 |
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| Homoeocladia filiformis W. Smith 1856 |
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| Homoeocladia filiformis var. beta W. Smith 1856 |
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| Homoeocladia sigmoidea W. Smith 1856 |
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| Mastogloia apiculata W. Smith 1856 |
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| Mastogloia dansei (Thwaites) W. Smith 1856 |
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| Mastogloia lanceolata Thwaites in W. Smith 1856 |
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| Mastogloia smithii Thwaites in lit. ex W. Smith 1856 |
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| Mastogloia smithii var. beta W. Smith 1856 |
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| Melosira borrerii f. beta W. Smith 1856 |
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| Melosira nivalis W. Smith 1856 |
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| Melosira nummuloides var. gamma W. Smith 1856 |
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| Melosira westii W. Smith 1856 |
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| Meridion circulare var. beta W. Smith 1856 |
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| Meridion constrictum (constricta) var. beta W. Smith 1856 |
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