Dwarf Mistletoes: Biology, Pathology, and Systematics AH 709

Arceuthobium (dwarf mistletoes), a well-defined but morphologically reduced genus of the family Viscaceae, is parasitic on Pinaceae in the Old and New Worlds. In this taxonomic revision, the 46 recognized taxa comprise 42 species - 4 with 2 subspecies each, and 1 with 2 formal specialties. In addition to systematic and descriptive information for each species, we review ecological relationships, biotic associations, physiology, anatomy, pathogenic effects, and methods of control for the Arceuthobium. Color pictures, distribution maps, and a list of specimens examined are provided.