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L. E. Roth
Phytophthora [Chamaecyparis lawsoniana] root rot of Port-Orford-cedar. [Lateralis]
![Phytophthora [Chamaecyparis lawsoniana] root rot of Port-Orford-cedar. [Lateralis]](https://covers.openlibrary.org/b/id/11331196-L.jpg)