in person

Botany

PhD in Botany

Claremont Graduate University’s MS and PhD programs in Botany focus on systematics and evolution of higher plants. The programs are offered in conjunction with California Botanic Garden, one of the nation’s premier research-focused botanic gardens.

Claremont Graduate University’s PhD in Botany is a research-intensive program with a robust fieldwork component. Located in a unique 86-acre learning environment dedicated to conservation of the state’s flora, program highlights include a botanical library, fully equipped molecular and anatomy laboratories, comprehensive herbarium, scanning electron microscope, greenhouses, and growth chambers. You’ll find abundant opportunities for hands-on research at California Botanic Garden, working alongside collegial faculty-mentors dedicated to advancing knowledge in the field. A seminar series addressing topics of systematic and evolutionary botany is offered weekly during each semester and draws attendees not only from our student body, but also from the biology research community, faculty, and students at nearby colleges and universities.

Botany students may pursue concentrations in the following subdisciplines:

  • Comparative morphology
  • Floristics
  • Molecular systematics
  • Monographic and revisionary studies
  • Phylogenetics
  • Plant anatomy
  • Plant geography
  • Population and conservation genetics
  • Reproductive biology

This program is STEM designated, allowing international students who hold F-1 visas to apply for OPT work authorizations for a total of 36 months (an initial 1-year period and a 24-month OPT STEM extension) of paid work experience in the U.S. after graduation.

Program At-a-glance

  • 72 units

    required units

  • PhD in Botany

    degree awarded

  • In Person

    modality

  • Fall

    program start

  • 5 years | full time*

    estimated completion time

Faculty

  • Portrait of Lucinda McDade

    Lucinda McDade

    Professor of Botany
    Chair, Botany Department
    Executive Director, California Botanic Garden
    Judith B. Friend Director of Research

    Research Interests

    Family Acanthaceae; Role of hybridization in plant evolutionary history, phylogeny reconstruction, and plant reproductive biology; Tropical plants;
    Systematics

  • Portrait of Travis Columbus

    Travis Columbus

    Professor of Botany, Research Scientist

    Research Interests

    Agrostology (study of grasses), Plant systematics, Biological nomenclature, Phylogenetics

  • Portrait of Naomi Fraga

    Naomi Fraga

    Associate Professor of Botany

    Research Interests

    Floristics in western North America; Plant conservation; Rarity and endemism in California; Systematics of Phrymaceae; Pollination biology

  • Mare Nazaire

    Mare Nazaire

    Assistant Professor of Botany

    Research Interests

    California floristics, peatlands and wetlands, desert systems, alpine floras, systematics of Mertensia (Boraginaceae)

Application Guidelines

University Requirements
Application Fee

The Botany Program waives the $80 admissions application fee and the $200 admissions deposit fee. Email botany@cgu.edu to request the application fee waiver code.

Official Transcripts

Undergraduate/graduate

Applicants must submit a sealed, official transcript from every undergraduate and graduate institution that has granted the applicant a degree. Electronic transcripts sent to admissions@cgu.edu are also accepted. For undergraduate coursework, applicants are required to submit proof of a completed bachelor’s degree from a regionally accredited college or university. Unofficial copies of transcripts are accepted for review purposes, but official copies will be required upon admission.

Applicants currently earning a degree that will be completed prior to attending CGU are required to submit a transcript showing work in progress for evaluation purposes. Once the degree has been granted, a final official transcript documenting the degree conferred must be submitted to CGU.

International applicants are advised to review the International Transcript Guidelines for additional information on submitting international transcripts.

English Proficiency Exam

Required (international applicants only)

A valid score on one of the following examinations TOEFL, IELTS, Pearson PTE, Duolingo English Test is required of all non-native English-speaking applicants. The examination is not required for the following applicants:

  • Citizens or permanent residents of countries where English is the sole official language of instruction, e.g., Australia, Bahamas, Barbados, Canada (except Quebec), England, Ghana, Ireland, Jamaica, Kenya, New Zealand, Nigeria, Scotland, St. Vincent and the Grenadines, Trinidad, Tobago, Uganda, and Wales (see the CGU Bulletin for a complete list of accepted countries).
  • Applicants who hold an undergraduate or advanced degree, or will have earned such a degree prior to enrolling at CGU, from an institution in the US or in countries where English is the sole official language of instruction (see above).
  • Applicants who have successfully completed an academic English pre-master’s or intensive graduate bridge program from a nationally recognized, regionally accredited four-year college or university in the United States in the last two years, with submitted evidence of successful completion, and subject to curriculum approval.
  • CGU allows for an English proficiency waiver if the applicant has received, or will receive prior to enrollment at CGU, an undergraduate or advanced degree from an institution where English is one of the primary languages of instruction for the majority of courses in the student’s program. To receive the waiver, documentation must be provided by the applicant to show that English is the language of instruction at their university/college.

CGU’s school code for the TOEFL exam is 4053.

International applicants are encouraged to visit our International Applicants page for more information, including score requirements.

Resume

Applicants must submit an up-to-date copy of their resume.

Program Requirements
Statement of Purpose

Please submit a 2-3 page statement of purpose that details your academic and/or professional achievements, your specific areas of research interest within your desired field of study, why you are a strong candidate for graduate studies at CGU, and your career goals.

Academic Prerequisites

You must have an undergraduate GPA of at least 3.0 on a 4-point scale (or equivalent). You should have a demonstrated ability to perform independent research.

Letter of Recommendation

3 letters required

When filling out the online application, please enter references acquainted with your potential for success who will submit a written recommendation on your behalf. In most academic departments, references from faculty members who can speak to your academic ability are preferred; applicants with substantial work experience may request professional references. Please do not enter family members as references.

You will be required to input information for your recommenders (whether they are submitting online or not) in the “Recommendations” section of the online application. Please follow the directions in this section carefully before clicking on “Recommendation Provider List” to input the names and contact information for each recommender. You will have an opportunity to indicate if the reference writer will be submitting online. These reference writers will receive an email from CGU with instructions on submitting an online recommendation.

Recommenders who are indicated as offline will not receive an email from CGU with instructions to submit. These reference writers can submit via traditional mail and should use the supplemental New Student Recommendation Form. Recommenders can also email their letter of recommendation to the Office of Admissions at admissions@cgu.edu.

Download the Recommendation Form

Standardized Test Scores

GRE (optional)

Standardized test scores are not required in order to apply for this program. Applicants who have taken the Graduate Record Examinations (GRE) General Test are invited to submit scores, but are not required to do so.

Applicants who feel that their Grade Point Averages do not adequately represent their ability to succeed in a graduate program may find it helpful to submit GRE scores for consideration.

CGU’s school code:
ETS (GRE and TOEFL) 4053

Key Dates and Deadlines

CGU operates on a priority deadline cycle. Applicants are strongly encouraged to submit complete applications by the priority dates in order to assure maximum consideration for both admission and fellowships.

Once the priority deadlines have passed, the University will continue to review applications for qualified candidates on a competitive, space-available basis. The final deadlines listed are the last date the University can accept an application in order to allow sufficient time to complete the admissions, financial aid, and other enrollment processes.

Fall 2025
Application Deadline – January 15, 2025
Classes begin – August 25, 2025

Additional Information

It is strongly recommended that prospective students communicate directly with prospective faculty advisors whose research best fits their own interests. Owing to the small size of the program, “fit” is a key component of admission.

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California Botanic Garden

Spread across 86 acres in Claremont, California, the Garden displays about 2000 taxa of California plants and includes those native to the California Floristic Province as a whole. Nestled in the foothills of the San Gabriel Mountains, the Garden offers beautiful mountain vistas.

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