- Agronomy — Application of plant science to crop production
- Bryology — Mosses, liverworts, and hornworts
- Cryptobotany — Study of plants largely considered nonexistent
- Dendrology – Study of woody plants, shrubs, trees and lianas
- Economic botany — Study of plants of economic use or value
- Ethnobotany — Relationship between humans and plants
- Forestry — Forest management and related studies
- Horticulture — Cultivated plants
- Lichenology — Lichens
- Mycology — Fungi
- Paleobotany — Fossil plants
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- Palynology — Pollen and spores
- Phycology — Algae
- Phytochemistry — Plant secondary chemistry and chemical processes
- Phytopathology — Plant diseases
- Plant anatomy — Cell and tissue structure
- Plant ecology — Role of plants in the environment
- Plant genetics — Genetic inheritance in plants
- Plant morphology — Structure and life cycles
- Plant neurobiology — Behavioral-like aspects
- Plant physiology — Life functions of plants
- Plant systematics — Classification and naming of plants
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