The Sclerophomas associated with dieback of Douglas-fir

Two new species of Sclerophoma Höhn. are described from dieback of Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco) in British Columbia, Canada, viz. S. xenomeria n. sp. (conidial Xenomeris abietis Barr), and S. semenospora n. sp. Morphological and cultural characteristics are compared with S. pithyophila (Corda) Höhn., another common species in the same disease syndrome.