Summary: Nectria pithoides is distinguished "by the bright red perithecia which are decidedly barrel-shaped when dry". Other features include the yellowish stroma on bark of dead alders, and microscopic characters.
Microscopic: spores 6-10 x 3-4 microns, elliptic, colorless, 1-septate, with an oil droplet in each cell; asci 8-spored, 70-80 x 5 microns, cylindric
Notes: The type description is from BC.
Habitat and Range
SIMILAR SPECIES
Other Nectria species undoubtedly occur in the Pacific Northwest but they have not been comprehensively studied. In addition to Nectria cinnabarina, note the following collections: the University of British Columbia has BC collections labeled as Nectria coccinea, N. sanguinea, N. sulphurea, N. galligena, N. episphaeria, N. inventa, and N. pithoides. The University of Washington has WA collections of N. coccinea and N. episphaeria. O. Ceska has reported Nectria fuckeliana var. macrospora from B.C. Some of these have been recombined into Neonectria.