Polysiphonia is not a valid species
Did you mean one of the species from the following list?
Polysiphonia abscissa - 2 collection objects
Polysiphonia abscissoides - 1 collection objects
Polysiphonia amphibolis - 1 collection objects
Polysiphonia australiensis - 3 collection objects
Polysiphonia beaudettei - 1 collection objects
Polysiphonia brodiei - 14 collection objects
Polysiphonia crassiuscula - 1 collection objects
Polysiphonia croajingolongensis - 10 collection objects
Polysiphonia daveyae - 2 collection objects
Polysiphonia decipiens - 79 collection objects
Polysiphonia denudata - 2 collection objects
Polysiphonia elongata - 6 collection objects
Polysiphonia flexicaulis - 1 collection objects
Polysiphonia infestans - 23 collection objects
Polysiphonia isogona - 8 collection objects
Polysiphonia mollis - 18 collection objects
Polysiphonia pacifica - 1 collection objects
Polysiphonia paniculata - 1 collection objects