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Scientific name English name Authority Reco<br />
rds<br />
First Last Nat. Status Axios Notes<br />
Populus balsamifera Eastern Balsam-poplar L. 31 1940 2002<br />
Populus nigra 'Gigantea' 2 1994 2010<br />
Populus nigra 'Italica' Lombardy-poplar Muenchh. 71 1970 2011<br />
Populus nigra cultivars Cultivated Black Poplar 4 2009 2011<br />
Populus nigra sens. lat. Poplar 40 1972 2011<br />
Populus nigra ssp. betulifolia Black Poplar (Pursh) W.Wettst. 67 1969 2011 Riverbanks<br />
Populus tremula Aspen Linnaeus 280 1867 2011 Upland<br />
rock<br />
As native<br />
Populus trichocarpa Western Balsam-poplar Torr. & A. Gray ex<br />
Hook.<br />
18 1973 2011<br />
Populus x berolinensis Berlin Poplar (P. laurifolia<br />
x nigra 'Italica')<br />
Dippel 3 1977 2002<br />
Populus x canadensis Hybrid Black-poplar Moench 205 1960 2011<br />
Populus x canadensis 'Marilandica' 1 1973 1973<br />
Populus x canadensis 'Regenerata' Railway Poplar 8 1976 1979<br />
Populus x canadensis 'Serotina' Black-Italian Poplar 41 1960 2010<br />
Populus x canescens Grey Poplar (P. alba x<br />
tremula)<br />
(Aiton) Smith 134 1969 2011<br />
Populus x generosa Generous Poplar 3 1979 1987<br />
Populus x jackii P. balsamifera x deltoides Sarg. 1 1995 1995<br />
Potamogeton alpinus Red Pondweed Balbis 8 1939 1972<br />
Potamogeton berchtoldii Small Pondweed Fieber 70 1807 2011<br />
Potamogeton coloratus Fen Pondweed Hornem. 2 1939 1944 Nationally Scarce<br />
Potamogeton compressus Grass-wrack Pondweed L. 1 1939 1939 Endangered<br />
Potamogeton crispus Curled Pondweed L. 99 1867 2011<br />
Potamogeton friesii Flat-stalked Pondweed Rupr. 1 1944 1944 Near Threatened<br />
Potamogeton gramineus Various-leaved Pondweed Linnaeus 1 1971 1971<br />
Potamogeton lucens Shining Pondweed Linnaeus 1 1975 1975<br />
Potamogeton natans Broad-leaved Pondweed Linnaeus 421 1944 2011<br />
Potamogeton obtusifolius Blunt-leaved Pondweed Mert. & Koch 13 1794 2011<br />
Potamogeton pectinatus Fennel Pondweed Linnaeus 105 1867 2011<br />
Potamogeton perfoliatus Perfoliate Pondweed Linnaeus 10 1955 2010<br />
Potamogeton polygonifolius Bog Pondweed Pourret 185 1859 2011 Upland
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