What Is Botany? Research Areas, Funding, and Career Paths

Botany is the scientific study of plants: their structure, growth, reproduction, metabolism, distribution, evolution, and interactions with their environment and with other organisms. It is one of the oldest formal branches of biology — people have systematically catalogued and studied plants for medicinal, agricultural, and taxonomic purposes for thousands of years — and today it underpins fields as varied as food security, drug discovery, climate science, and conservation biology. This guide gives a genuine, thorough answer to what botany studies and how its major subfields divide up the discipline, then adds the research-administration layer generic overviews leave out: who actually funds botanical research, the methods and tools the field relies on, and typical career and training paths into it.

What Is Botany?

Botany (also called plant science or, less commonly, phytology) is the branch of biology concerned with plants in the broad, traditional sense of the word — vascular plants, mosses and other bryophytes, ferns, and, in the classical scope of the discipline, algae and fungi as well (modern biology now generally treats algae and fungi as their own separate kingdoms with dedicated subfields — phycology and mycology — but botany departments and courses still frequently cover them for historical and practical reasons). As a formal discipline, botany asks a core set of interlocking questions:

• How are plants built, and how do those structures function? — plant anatomy and morphology examine tissues, organs (roots, stems, leaves, flowers, fruits, seeds), and the physical form that results from a plant’s developmental program.
• How do plants grow, develop, and carry out their metabolism? — plant physiology studies photosynthesis, water and nutrient transport, hormonal signaling, and the internal processes that let a stationary organism respond to a changing environment.
• How are plants related to one another, and what are the boundaries between species? — plant systematics and taxonomy classify and name plant diversity and reconstruct its evolutionary history.
• How do plants interact with their environment, other organisms, and each other? — plant ecology studies distribution, competition, pollination, herbivory, and the role plants play in ecosystems.
• How is genetic information encoded, inherited, and expressed in plants? — plant genetics and molecular biology examine heredity, gene function, and increasingly genome-scale variation across species and populations.

Because plants are the primary producers at the base of nearly every terrestrial food web — converting sunlight into the chemical energy that the rest of the biosphere depends on — botany is not a narrow specialty. It touches agriculture and food security, forestry, pharmacology and natural-products drug discovery, horticulture, conservation and restoration ecology, and climate science (plants are both a major carbon sink and a system highly sensitive to a changing climate). The name comes from the Greek botane, meaning “pasture” or “fodder,” reflecting the discipline’s ancient roots in identifying which plants were useful, edible, or medicinal — a practical origin that still echoes in how closely botany remains tied to agriculture, horticulture, and pharmacognosy today.

How Botany Relates to Neighboring Disciplines

Botany is a branch of the broader field of biology, sitting alongside zoology, microbiology, and other organism-focused branches as one of biology’s classical divisions — the traditional split being simply “the study of plants” versus “the study of animals” versus “the study of microorganisms.” Botany shares deep methodological and conceptual overlap with several neighboring fields:

• Ecology — plant ecology is one of the largest subfields of both botany and general ecology; much of what is known about community structure, succession, and species interactions was developed studying plant communities specifically. See CASRAI’s guide to what is ecology for the broader discipline.
• Genetics — plant genetics has historically driven major advances in the science of heredity itself (Gregor Mendel’s foundational work was done with pea plants), and modern plant genomics is a large, active research area in its own right. See what is genetics.
• Agricultural science — crop science, agronomy, and plant breeding apply botanical knowledge directly to food production; see CASRAI’s companion guide on what is agricultural science.
• Chemistry — phytochemistry, the study of chemical compounds plants produce (many of pharmacological interest), sits at the boundary between botany and organic chemistry; see what is chemistry.

For the full landscape of how botany fits alongside biology’s other major branches and the wider sciences, see CASRAI’s branches of science hub guide.

Major Sub-Disciplines of Botany

Botany divides into a number of well-established subfields, several of which overlap substantially with other branches of biology:

• Plant systematics and taxonomy — classifying and naming plant diversity and reconstructing evolutionary relationships among plant lineages, historically through comparative morphology and increasingly through DNA-sequence-based phylogenetics.
• Plant physiology — how plants carry out photosynthesis, respiration, water transport (transpiration), nutrient uptake, and hormonal regulation of growth and development.
• Plant anatomy and morphology — the internal tissue structure and external form of plant organs, and how structure relates to function.
• Plant ecology — how plants interact with their physical environment, with pollinators and herbivores, and with each other, from the level of individual populations up to entire biomes.
• Plant genetics and genomics — inheritance, gene function, and genome-scale variation in plants, including the genetic basis of traits important to breeding and adaptation.
• Plant pathology — diseases of plants caused by fungi, bacteria, viruses, and other pathogens, and how to diagnose, manage, and breed resistance to them; closely tied to agricultural science.
• Paleobotany — the fossil record of plants and the evolutionary history of plant life over geological time.
• Ethnobotany and economic botany — how human societies use plants for food, medicine, fiber, and other purposes, including traditional and Indigenous plant knowledge and the search for new natural-product compounds.
• Plant biotechnology — applying molecular tools to modify or improve plants, from tissue culture and micropropagation to genetic engineering and genome editing.

Two closely related fields — the study of algae (phycology) and the study of fungi (mycology) — are, in strict modern biological classification, no longer considered part of the plant kingdom (algae are polyphyletic and often grouped with protists; fungi form their own separate kingdom, more closely related to animals than to plants). Both are nonetheless still frequently taught within botany departments and courses for historical and practical reasons, and a working botanist may well work on algae or fungi even though, strictly, neither is a plant.

How Botany Research Is Funded

Botanical research in the United States is funded across several federal agencies, each with a different emphasis:

• National Science Foundation (NSF), Directorate for Biological Sciences (BIO) — NSF is the primary federal funder of fundamental, non-agricultural plant science in the US, supporting basic research into plant physiology, development, genetics, systematics, and ecology as part of its broader mandate to fund biology “from molecules to ecosystems.” Plant-focused proposals are reviewed within BIO’s programs covering organismal biology, environmental biology, and genomics/bioinformatics infrastructure.
• USDA National Institute of Food and Agriculture (NIFA) — through the Agriculture and Food Research Initiative (AFRI), USDA NIFA funds plant research with a direct application to agriculture, under AFRI’s “Plant Health and Production and Plant Products” priority area — crop breeding, plant pathology, and applied plant physiology relevant to food and fiber production.
• US Department of Energy (DOE), Office of Science — DOE’s Biological and Environmental Research program funds plant research with relevance to bioenergy and environmental systems, including photosynthesis research and the genomics of bioenergy feedstock crops.

Beyond federal agencies, a substantial share of applied plant research funding and infrastructure comes from land-grant university agricultural experiment stations (a system dating to the Hatch Act of 1887, funded jointly by USDA and individual states), and from major botanical gardens and herbaria that combine living and preserved plant collections with active research programs — examples include the Missouri Botanical Garden, the New York Botanical Garden, and the Royal Botanic Gardens, Kew in the UK. Professional societies in the field, discussed further below, also administer smaller research and travel grants for their members, particularly for graduate students and early-career researchers.

Common Research Methods and Tools in Botany

Botanical research draws on a broad toolkit spanning fieldwork, laboratory science, and increasingly, large-scale digital data:

• Herbarium specimens — pressed, dried, and labeled plant specimens are the discipline’s foundational voucher record, used to document species distributions, describe new species, and support taxonomic revisions; major herbaria hold millions of specimens accumulated over centuries.
• Field survey and sampling — systematic vegetation surveys, quadrat sampling, and transect methods to characterize plant communities and track change over time.
• Microscopy — light and electron microscopy to examine plant cell structure, tissue anatomy, and reproductive structures.
• Controlled-environment experimentation — greenhouses and growth chambers that let researchers manipulate light, temperature, water, and nutrients to isolate their effects on plant growth and physiology.
• Physiological measurement instruments — gas-exchange analyzers to measure photosynthesis and respiration rates, and related instruments to measure water potential and stomatal conductance.
• DNA sequencing and molecular phylogenetics — genome and marker-gene sequencing to reconstruct evolutionary relationships and study genetic variation, often deposited in shared repositories such as GenBank.
• Digitized biodiversity databases — occurrence and specimen data increasingly get shared through infrastructure such as the Global Biodiversity Information Facility (GBIF); see CASRAI’s guide on GBIF and the Darwin Core occurrenceID standard for how that data-sharing works in practice.

Career and Training Pathways

Formal training in botany typically starts with an undergraduate degree in biology, plant biology, or botany itself, followed for research-track careers by a graduate program (MS and/or PhD) in plant biology, botany, plant pathology, or a closely related field, structured much like graduate training in the rest of biology: coursework, a qualifying process, original dissertation research under a faculty advisor, and typically several years of post-PhD postdoctoral research before an independent faculty, museum, or agency research position. Career paths for trained botanists include academic and land-grant university research and teaching positions, herbarium and botanical garden curatorial and research roles, USDA and other federal agency scientist positions, agricultural and biotechnology industry research roles (plant breeding, crop protection), conservation and land-management organizations, and science communication or extension roles that translate plant science for growers and the public.

Two long-established professional societies anchor the field in the US: the Botanical Society of America (BSA), founded in 1893, which publishes the American Journal of Botany and holds an annual Botany conference; and the American Society of Plant Biologists (ASPB), which publishes The Plant Cell and Plant Physiology and focuses more heavily on plant physiology and molecular plant biology. Both societies offer student and early-career memberships, journals, and (as noted above) research and travel grant programs.

Frequently Asked Questions

What is botany the study of?

Botany is the scientific study of plants — their structure, growth, reproduction, physiology, genetics, classification, distribution, and interactions with their environment. Depending on the course or department, it may also cover algae and fungi, which are classified separately from plants in modern biology but are studied using closely related methods.

Is botany a branch of biology?

Yes. Botany is one of biology’s classical organism-based branches, alongside zoology (animals) and microbiology (microorganisms). It shares biology’s core concepts — evolution, genetics, cell biology, ecology — applied specifically to plants.

What is the difference between botany and horticulture?

Botany is the scientific study of plants as a branch of biology, concerned with understanding how plants work and how they are related to one another. Horticulture is the applied practice of cultivating plants — for food, ornamental, or landscape purposes — and draws on botanical science but is oriented toward growing plants successfully rather than studying them as a primary goal.

What jobs can you get with a botany degree?

Common paths include academic and government research positions, herbarium and botanical garden curatorial roles, USDA and other agency plant scientist positions, agricultural and biotechnology industry research (plant breeding, crop protection), conservation organizations, and extension or science communication roles. A research career track typically requires graduate training (MS or PhD); many applied roles are accessible with a bachelor’s degree.

Who funds botany research?

In the US, the main federal funders are the National Science Foundation (fundamental plant science), the USDA’s National Institute of Food and Agriculture through its Agriculture and Food Research Initiative (applied/agricultural plant science), and the Department of Energy’s Office of Science (bioenergy- and photosynthesis-related plant research). Land-grant university agricultural experiment stations, major botanical gardens, and professional societies also fund and support botanical research at a smaller scale.

Related Guides

For the broader landscape this guide sits within, see CASRAI’s branches of science hub and its companion guide to what is biology. Botany also connects closely to what is ecology, what is genetics, and, once published, CASRAI’s guides to what is agricultural science and what is oceanography (for the study of marine plant and algal life).