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| Achnanthes expressa J. R. Carter in Hartley 1986 |
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| Achnanthes lanceolata var. elliptico-lanceolata (Schaarschmidt) R. Ross in Hartley 1986 |
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| Achnanthes quadratarea (Østrup) R. Ross in Hartley 1986 |
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| Achnanthes quadratarea var. fennica (A. Cleve-Euler) R. Ross in Hartley 1986 |
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| Achnanthes sonyda J.R. Carter in Hartley 1986 |
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| Aulacoseira distans var. humilis (A. Cleve-Euler) R. Ross in Hartley 1986 |
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| Aulacoseira distans var. tenella (Nygaard) R. Ross in Hartley 1986 |
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| Aulacoseira fennoscandica (A. Cleve-Euler) R. Ross in Hartley 1986 |
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| Aulacoseira italica f. crenulata (Ehrenberg) R. Ross in Hartley 1986 |
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| Aulacoseira lirata (Ehrenberg) R. Ross in Hartley 1986 |
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| Aulacoseira lirata var. lacustris (Grunow in Van Heurck) R. Ross in Hartley 1986 |
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| Aulacoseira lirata var. perglabra (Østrup) R. Ross in Hartley 1986 |
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| Berkeleya scopulorum var. belgica (Van Heurck) R. Ross in Hartley 1986 |
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| Berkeleya scopulorum var. perlonga (Brun) R. Ross in Hartley 1986 |
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| Brachysira brebissonii R. Ross in Hartley 1986 |
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| Brachysira brebissonii f. thermalis (Grunow in Van Heurck) R. Ross in Hartley 1986 |
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| Brachysira follis (Ehrenberg) R. Ross in Hartley 1986 |
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| Brachysira styriaca (Grunow in Van Heurck) R. Ross in Hartley 1986 |
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| Brachysira vitrea (Grunow) R. Ross in Hartley 1986 |
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| Caloneis crassa (Gregory) R. Ross in Hartley 1986 |
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