& Melin, (1927) Phoma acicola (Moug.

Wynne & Gott, (1956) Pycnis pinicola Zopf, (1881) Pyrenochaeta acicola (Moug.

Sacc., (1884) Sclerophoma pityophila (Corda) Höhn., (1909) Sclerotiopsis pityophila (Corda) Oudem., (1904) Sphaeronaema pithyophilum Corda, (1840) Sphaeropsis acicola Lév., (1848) Sphaeropsis acicola Pass., (1890) Sydowia polyspora is a plant pathogen infecting Douglas firs.

[citation needed] In Iceland, it has been reported to infect Larix russica, Pinus contorta and Pinus mugo.

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