Polysiphonia nigrescens (Huds.) Grev. ex Harv.

ALGAE SCANDINAVICAE
Exsiccatae
QXJAS ADJE0TI8 0HARACK1S
distribuii
John ehr. Areschoug.
Upsalle 1861-1876.
[	, Columbia University. Purchased i8qb.
152. Polysiphonia lirodicei Aresch. Phyc. Sc. p. 50.
Polysiphonia nigrescens cl pectinata J. Ag.
sp. 2 p. 1058.
In mari Bahusiee. Junio.
Domina S, Akermark.
Hsec junior, et quae antea (sub. n:o 63) tradita est
iplantn adultior forma.
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