An Undescribed Phomopsis from Douglas Fir on the Pacific Coast

SUMMARY

A hitherto unrecognized species of Phomopsis on the Pacific Coast associated with a definite canker of young Douglas fir, Pseudotsuga taxifolia, is herein described as P. Lokoyae sp. nov. This organism is morphologically and culturally distinct from P. Pseudotsugae which previous investigation has shown to cause a similar canker of exotic Douglas fir in Europe. The western Phomopsis appears to be confined to a single host species and to a limited geographical range.