Published online by Cambridge University Press: 28 March 2007
Apothecia from Usnea longissima thalli collected in the Oregon Coast Range are described. Fertile U. longissima specimens have seldom been observed and rarely documented in the literature. A brief history of accounts in the literature is given, and possible reasons for the infrequent occurrence of apothecia are discussed. This is the first published account of fertile U. longissima specimens in the U.S. Pacific Northwest.