1. Plant Disease
  2. Host and Disease Descriptions

Cedar, Port Orford (Chamaecyparis lawsoniana)-Seiridium Canker

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Latest revision: 
March 2026
Image related to Cedar, Port-Orford (Chamaecyparis lawsoniana)-Seiridium Canker

Seiridium canker on Port-Orford-Cedar. Tree has been inoculated with the fungus. Picture shows death of tissue above cankered stem.

Danielle Martin
Image related to Cedar, Port-Orford (Chamaecyparis lawsoniana)-Seiridium Canker

Seiridium canker on Port-Orford-Cedar. Tree has been inoculated with the fungus.

Danielle Martin

See:

Cypress (Cupressus spp.) - Canker

Notes: Seiridium cardinale is the usual fungus but a different species of Seiridium may be involved with cankers of Port Orford cedar in Oregon. Australia, Japan and New Zealand report S. unicorne on Port Orford cedar.