James Harvey Logan was an American botanist and horticulturist known for his contributions to the study of plants. He was particularly recognized for his work on the flora of the western United States, where he documented various species and their habitats. His research helped advance the understanding of plant diversity in the region. Logan was also involved in the establishment of several botanical gardens and institutions. His efforts in promoting plant conservation and education have had a lasting impact on the field of botany. He is remembered for his dedication to the study of botany and the natural world.