Morphological and molecular analyses of Arceuthobium aureum Hawksworth & Wiens and A. globosum Hawksworth & Wiens (Viscaceae) demonstrated that these taxa are closely related but can be distinguished based on a few morphological differences, phenology, and host ranges. Therefore, the taxa previously treated under A. aureum are recombined under A. globosum: A. globosum subsp. aureum (Hawksworth & Wiens) Mathiasen and A. globosum subsp. petersonii (Hawksworth & Wiens) Mathiasen.