CONTRIBUTION TO THE STUDY OF THE TULOSTOMATACEAE IN BAJA-CALIFORNIA, MEXICO .1.

Fifteen species of Tulostomataceae from the Baja California Peninsula, Mexico were studied. A thorough macroscopic and microscopic study of the species was undertaken, including observations of spores under the scanning electron microscope. Tulostoma submembranaceum is proposed a s a new species. Tulostoma exitum is a new record for America. Tulosto ma meridionale and T. macrocephalum are new records for Mexico. Tulost oma albicans and T. pygmaeum are new records for Baja California. Tulo stoma utahense is proposed as a synonym of T. meridionale.