General Terms:
* Botanist: This is the most common term for a scientist who studies plants. Botanists can specialize in various aspects of plant science, such as taxonomy, physiology, ecology, or genetics.
* Horticulturist: This term refers to someone who specializes in the cultivation of plants, particularly in gardens and landscapes. They focus on growing, maintaining, and propagating plants.
* Plant Scientist: This is a broader term that encompasses anyone who studies plants, regardless of their specific area of expertise.
Specialized Terms:
* Taxonomist: This expert specializes in classifying plants based on their characteristics and relationships.
* Plant Pathologist: This expert studies plant diseases and their causes.
* Phytochemist: This expert studies the chemical compounds found in plants.
* Agronomist: This expert specializes in the science and technology of crop production.
* Dendrologist: This expert focuses on the study of trees.
The best term to use will depend on the specific context and the expert's specific field of study.