Howard Scott Gentry was an American botanist who is especially known for his expertise on the agave plant. Over the course of his work, Gentry introduced 15,000 plants into the United States for study, with his most notable contributions consisting of the development of a cortisone precursor compound, the introduction of disease-resistant wild beans, and the development of jojoba oil. This collection is comprised of professional correspondence, proposals, and manuscripts related to his research of plant species. Also included are some photographs and related material to individual plants in the forms of published articles, pamphlets, booklets, and notes.