The University of Arizona Campus Arboretum Advisory Board

Dr. Tanya Quist is the director of the University of Arizona Campus Arboretum, Assistant Professor in The School of Plant Sciences. She earned a Ph.D. studying plant environmental stress and MS and BS degrees in horticulture science. She advocates for responsible landscape practices which protect urban trees and support sustainable landscape management. 





David Yetman is an academic expert on Sonora, Mexico and an Emmy award-winning media presenter on the world's deserts. He is a research social scientist at the University of Arizona. Yetman is a known as the 'voice' for the people and desert regions of the south-west USA and Northern Mexico. His publications date back to the 1980s and often deal with the plant use of particular tribes and peoples.
Mark Dimmitt is a botanist, plant breeder, former director of natural history at the Arizona-Sonora Desert Museum and world-renowned expert on Adeniums, the desert rose, and other of the world's weirdest plants from extremely dry environments. Mark is an invaluable advisor to Campus Arboretum providing advice and direction on plant selection and culture. 

Sandra Obenour-Dowd is the Grounds Superintendent for the University of Arizona. She earned her B.S. degree in Horticulture from Texas A&M University. From wholesale and retail nurseries, to tissue culture at the Biosphere, to golf course horticulturist, to university grounds maintenance, she has a deep horticultural background. Sandra has lived in all three of the southwestern United States deserts and has a great interest in promoting the beauty and functionality of native and adapted plants in the landscape.



Margaret Pope is a scientific illustrator who has done commissioned work for private individuals, businesses and organizations.  Solo exhibits of her work have been held at Tohono Chul Park  and  Tucson Botanical Gardens and her work has been juried into both local and international exhibits. She has also curated several exhibits. In 2008 she began The Sonoran Desert Florilegium Program, a non-profit organization sponsored by the Tucson Cactus and Succulent Society, whose mission it is to promote and preserve botanical art of the Sonoran Desert region.  Prior to becoming an artist Margaret received a B.S. in Science, from the University of San Francisco and a Masters in Public Health and Nurse-Midwifery from The Johns Hopkins School of Hygiene and Public Health.  She was in the Peace Corps in India from 1965 -1968 and worked as a nurse-midwife on the Navajo Reservation and in Tucson from in 1970 through 1979.  

Dr. Steven Leavitt, Steven Leavitt has a B.S. degree in Geology from the University of Illinois, M.S. in Environmental Sciences from the University of Virginia, and Ph.D. in Geochemistry from the University of Arizona. Leavitt is the Associate Director of the Laboratory of Tree-Ring Research at the University of Arizona. His specialty is isotope dendrochronology as applied to paleoclimate and ecology questions. He has been author or co-author on more than 150 papers, and has been Principal Investigator or Co-Investigator on 20 grants from various agencies including National Science Foundation, U.S. Dept. of Agriculture, U.S. Dept. of Energy, and National Oceanic and Atmospheric Administration.  Leavitt teaches classes related to global change, biogeochemical cycles and isotope dendrochronology, and he has also been editor of the international journal Tree-Ring Research since 2001.

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Juan Barba Juan Barba is a Consulting and Working Arborist, the owner of Juan J. Barba & Associates in Tucson, Arizona.  Holding a degree in Environmental and Landscape Horticulture from the UofA and ISA Arborist Certification, Juan has practiced in and instructed all facets of arboricultural & horticultural care around Arizona and many other states.  A native Tucsonan who enjoys traveling, he is a past president of Western Chapter, ISA and a former chair of Trees for Tucson.



Ann Audrey is an alumna of the U of A, and has spent many happy hours over the years walking among the wonderful trees in the Campus Arboretum. As a board member, she tirelessly uses her experience as a fundraiser and expertise in running non-profits to help with marketing, fundraising and landscape development. 





Profile image for Ross Charles CoelhoJudith Ratliff (MLA, UA 1991) has been designing Tucson landscapes for 25 years. She's also known for the articles she's written on plantings, design issues and architecture for various publications. 









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Bob Baker is a UA alum and possibly the most dedicated Campus Arboretum board member -  having served since it's inception! Bob has devoted his time and energy to outreach, donating unique and beautiful plants, actively attending arboretum events and making his love for campus known through advocacy for the arboretum programs. 







Profile image for Ross Charles CoelhoLori Woods earned her Landscape Architecture degree from the UA and works with RECON Environmental, Inc. She is native Tucsonan, with a passion for Sonoran desert conservation and habitat restoration. Ms. Woods provides design consultation assistance to Dr. Quist for key areas of the Campus Arboretum that are prioritized for revitalization, giving careful consideration to their historic context.