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| Achnanthes clevei var. rostrata Hustedt 1930 |
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| Achnanthes conspicua var. brevistriata Hustedt 1930 |
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| Achnanthes dispar var. angulata Hustedt 1930 |
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| Achnanthes exigua var. constricta (Torka) Hustedt 1930 |
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| Achnanthes grimmei Krasske in Hustedt 1930 |
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| Achnanthes grimmei var. elliptica Krasske in Hustedt 1930 |
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| Achnanthes hauckiana var. elliptica Schulz ex Hustedt 1930 |
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| Achnanthes hauckiana var. rostrata Schulz ex Hustedt 1930 |
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| Achnanthes kolbei Hustedt 1930 |
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| Achnanthes lacunarum Hustedt 1930 |
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| Achnanthes lanceolata var. rostrata (Østrup) Hustedt 1930 |
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| Achnanthes oestrupii (Cleve-Euler) Hustedt 1930 |
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| Achnanthes ploenensis Hustedt 1930 |
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| Amphiprora costata Hustedt 1930 |
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| Amphora coffeaeformis var. acutiuscula (Kützing) Hustedt 1930 |
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| Amphora delicatissima Krasske in Hustedt 1930 |
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| Amphora holsatica Hustedt 1930 |
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| Amphora normanii var. undulata Krasske in Hustedt 1930 |
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| Amphora ovalis f. gracilis (Ehrenberg) Hustedt 1930 |
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| Anomoeoneis serians var. brachysira (Brébisson in Rabenhorst) Hustedt 1930 |
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