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1,100,502 specimens across 6 departments, collected since 1754 — 100,256 names, 42,336 type specimens.
Polysiphonia nigrescens
BISH 538686
Stephenson, T.A., 1948
Prince Edward, Canada
Polysiphonia nigrescens
BISH 538687
Stephenson, T.A., 1948
Caribou, Canada
Polysiphonia nigrescens
BISH 538688
Stephenson, T.A., 1948
Canada
Polysiphonia nigrescens
BISH 538689
Stephenson, T.A., 1948
Prince Edward, Canada
Polysiphonia nigrescens
BISH 538690
Stephenson, T.A., 1948
Canada