Regenstein School Faculty and Instructors

PHOTO: Andrew Bell Teaching

Continuing education instructors are a special breed! They are enthusiastic about their subject matter, bring real-world expertise to the classroom, understand the needs of adult learners, and enjoy the interaction between student and instructor.

Find information on your instructor's background and credentials below. Interested in joining our staff? Send us your inquiry here.


Anderson, Alan,Chicago Audubon Society and member of the Board of Directors since 1977. Member of the Evanston North Shore Bird Club, Chicago Ornithological Society, Illinois and National Audubon Societies, and the Illinois Ornithological Society.

Appleby, James E., Ph.D., associate professor, Department of Natural Resources and Environmental Sciences, University of Illinois at Urbana-Champaign. He is particularly interested in studying the life histories of the numerous insects and mites that are found on landscape plants in Illinois.

Arkin, Bonnie, mosaic/jewelry teacher. Member of the Society of American Mosaic Artists and award-winning mosaic and jewelry designer

Ayres, Darin, sales and technical services representative for FX Luminaire, manufacturer of specification-grade low voltage outdoor lighting components; former founder and owner of local outdoor lighting design/build firm; B.S. in ornamental horticulture from the University of Illinois with more than 14 years experience in the green industry.

Bailey, Steven D., ornithologist with the Illinois Natural History Survey; is especially intrigued with owls. Co-author of Birds of Illinois, he has given owl presentations throughout the state and can be coaxed into doing his world-famous Barred Owl call. Also the associate editor of Meadowlark, the state's quarterly ornithological journal.

Baker, Cynthia, manager of horticultural services at the Chicago Botanic Garden. B.S. in ornamental horticulture and agronomy from the University of Arizona.

Belding, Richard, horticulturist, Regenstein Fruit & Vegetable Garden, Chicago Botanic Garden. M.S. in horticulture from University of Wisconsin, Madison, and B.S. in aeronautical science from Embry-Riddle Aeronautical University. Former owner of a design and installation firm for residential landscapes.

Bement, Lynn, principal, the Organic Garden. Coach and advisor for Soil Foodweb, Inc. Master Gardener, treasurer, and board member of the Midwest Ecological Landscaping Association. Horticultural certificate from Morton Arboretum, Master Composter certification from Michigan State University, and additional certification from Iowa State University.

Bergmann, Craig, ASLA, registered landscape architect, garden designer, plantsman, and lecturer. Editor of Sunset's Midwestern Landscaping.

Botts, Beth, Chicago-area garden writer. Raised on the South Side by an organic gardener; editor, reporter, and garden writer for the Chicago Tribune for 21 years. Currently a senior editor at Chicagoland Gardening magazine. Also writes, speaks, and works on her mostly shady garden in the near west suburbs, and blogs at growinginchicago.com. 

Breuer, Linda, owner of Barnswallow, a Wild Bird Concern, dedicated to the rehabilitation of injured and orphaned wild birds with the goal to returning them to the wild and educating the public. Barnswallow admits aproximately 150 injured and orphaned raptors (hawks, owls, and falcons) each year and conducted 70 programs to more than 7,000 adults and children in 2007.

Bryan, Linda Oyama, photographer with specialty in landscapes and architecture. Has photographed extensively for the Chicago Botanic Garden and for the most notable landscape and architectural professionals in Chicagoland.

Cantwell, David S., assistant horticulturist, berm and wall gardens, Chicago Botanic Garden. M.S. from Roosevelt University, Chicago.

Carlson, Jack, certified professional photographer specializing in natural scenic images. Awarded the Commercial Print of the Year for 2005 by the Chicago Professional Photographers Association, and continues to be an active member of that group.

Carlson, Robin, photographer of the Chicago Botanic Garden since 2006. Earned a B.F.A. in illustration from the Rhode Island School of Design in 2003 and is now pursuing an M.F.A. at Columbia College Chicago.

Carman, Jack, ASLA landscape architect, president, Design for Generations, LLC. Specializes in creating therapeutic exterior environments for senior communities and healthcare facilities.

Carroll, Benjamin, senior horticulturist, Chicago Botanic Garden. B.S. in horticulture, Writtle College in Essex, England. Was employed for two years at Cambridge University Botanic Garden before joining the Chicago Botanic Garden staff.

Catlett, Rachel, artist, designer, and gardener. Has worked in the horticultural field in the Chicagoland area for the last 15 years. Moved from the east coast in 1992 to work at the Chicago Botanic Garden; ran her own garden design and consulting firm, The Garden Fairy; most recently has been associate head gardener at Craig Bergmann Landscape Design Inc. Currently works with her husband as caretaker of a private estate in Wisconsin, closer to her home and family in Delavan.

Cavallino, Lucia, restaurateur. Realized a lifelong dream when she and her husband Enzo opened their namesake Long Grove restaurant Enzo & Lucia's in December 2001. Shares and adapts generations of family recipes with a loyal clientele who appreciate fresh, cooked-to-order, authentic Italian food.

Clifton, Nancy, horticulture program specialist in visitor programs at the Chicago Botanic Garden with specialization in containers, troughs, wreaths, herbs, and other botanical crafts.

Crawford, Wylie, resident carillonneur for the Chicago Botanic Garden since the dedication of the Theodore C. Butz carillon in 1986. Member of the Guild of Carillonneurs. President of the World Carillon Federation.

Danielson, Donna, plant clinic assistant at the Morton Arboretum. A.A.S. in ornamental horticulture, College of DuPage, and M.A. in crop science, University of Illinois, with specialization in pest management of woody ornamentals.

Darin, Sam, Master Gardener, volunteer at the Chicago Botanic Garden, and tool and die designer. Sharpens and maintain tools for many of the horticulturists at the Garden. Instructor for the classes Tool Time with Sam, Tool Care and Sharpening, Felco Pruner Care, and Master Gardener Tool Care and Sharpening.

DeVore, Sheryl, reporter for the Chicago Tribune and author of three books about birds. Has given presentations throughout the Midwest on birds and is the chief editor for Meadowlark, published by the Illinois Ornithological Society. Her nature and environment stories have won numerous regional and national awards.

Diblik, Roy, co-owner of Northwind Perennial Farm, est. 1991, specializing in perennials, native plants, and ornamental grasses, and landscape design and installation. Has propagated more than 140 prairie species and was recently involved in the installation of the Lurie Garden in Chicago's Millennium Park.

Dion, Daniel, supervisor of specialty areas and the garden wall at the Chicago Botanic Garden. B.A. from Southern Illinois University in forestry/outdoor recreation resources management and plant and soil science.

Donelley, Marlene Hill, scientific illustrator in the geology department at the Field Museum. Degrees in zoology and art. Co-author of Painting Wildlife in Watercolor.

Donovan, Mary Chapman, ASID, CAPS, principal, Donovan Design, residential designer. B.S. from Florida State University, A.A.T. in environmental horticulture from Gwinnett Technical College.

Eskandari, John, buyer/manager of Gethsemane Garden Center's trees and shrubs department. Has a degree in horticulture from Michigan State University as well as a degree in English literature from the University of Michigan. Is a certified arborist and maintains active memberships in many Illinois landscape/horticulture organizations. A sought-after guest speaker at neighborhood garden clubs and schools, where he shares his experiences, opening peoples' minds to the joy of growing woody plants.  

Feldman, Pamela, artist/instructor, weaver, and natural dyer. M.F.A. from the School of the Art Institute of Chicago and certificate of excellence in dyeing from the Weavers Guild of America. Co-publisher of The Turkey Red Journal, a newsletter about natural dyes.

Fraley, Tobin, photographer and author of three books. Currently working on a multiyear project of photographically documenting the Reed Turner Woodland Nature Preserve. Tobin and his wife, Rachel, also own and operate several stores and art galleries in Long Grove.

Freeman, Carol, photographer and founder of the Endangered Species Photography Project, which attempts to photograph all the threatened and endangered species in Illinois. Award-winning contributor to books and magazines.

Fritz, Tom, plant healthcare specialist, Chicago Botanic Garden. Associate's degree from Joliet Junior College in horticulture (turf management) and an associate's degree from Kankakee Community College in agricultural business. Has worked at a number of different golf courses as assistant superintendent. Spent 11 years with the Des Plaines Park District as landscape maintenance supervisor and six years with the Wheeling Park District as horticultural supervisor.

Garner, Jerry, Ph.D. and B.S. in horticulture from Virginia Tech and an A.B. in English from the College of William and Mary. A freelance writer and consultant, he specializes in garden design history, botany, and orchids.

Garrity, DJ, award-winning sculptor. Served three consecutive tours of duty as sculptor-in-residence of Mount Rushmore National Memorial. Known as a sculptor, painter, and journeyman along the margins of abstract expression. www.djgarrity.com

Geiger, Barbara, adjunct professor, Illinois Institute of Technology, on faculty at School of the Art Institute of Chicago and in the Design Certificate Program at the Chicago Botanic Garden. Landscape historian and member of the Council of Educators in landscape architecture. Writing biography of O.C. Simonds for Library of American Landscape History/University of Massachusetts Press. M.A. in landscape architecture from the University of Wisconsin, Madison.

Gerdes Lemme, Valerie, ASLA, registered landscape architect. Chicago Botanic Garden instructor for more than 12 years and a private-practice residential designer. B.L.A. from Iowa State University and a M.L.A. from University of Wisconsin, Madison.

Gianneschi, David, horticulturist and landscape designer. Was involved in the award-winning Michigan Avenue streetscape and the Ruan Center in Des Moines. A regular lecturer at local garden clubs; serves as Technical Advisor for HGTV's The Seasoned Gardener and on the mayor's Landscape Advisory Taskforce as a Green Roof/Flowerbox Committee member.

Gorra, Jeffrey M., consulting biologist, X-Bar Diagnostics Systems, Inc. Jeff holds a Bachelors of Science in Molecular and Cell Biology and a Masters of Science in Genetics, both from the University of Connecticut. With over twenty years of research, training, and teaching experience, his research interests include the genetics and development of model species such as Drosophila melanogaster, as well as demographic and genetic analyses of rare plant populations in Illinois.

Grosch, Glenn, B.S. in agronomy from University of Illinois. Associate degrees in horticultural science and parks and grounds management from Harper College. Certified ISA arborist.

Guen, Terry, landscape architect, urban designer, principal, and president of Terry Guen Design Associates, Inc. Master landscape architect for Chicago's Millennium Park from 2000–05. Current work includes a sustainable plan for both Chicago's historic Martin Luther King Boulevard and the park and riverwalk areas along the Fox River in Aurora, Illinois, as well as the ecological restoration of Wisconsin's Duck Pond Recreation Area, Fontana. Graduate degrees in landscape architecture and urban design from the University of Pennsylvania.

Halliday, Nancy, museum artist for both scientific publications and educational exhibits for almost 50 years. Has taught scientific illustration since 1977. B.S. in zoology, University of Oklahoma, and M.A. in geography and environmental studies, Northeast Illinois University. Recently retired from the position of artist-naturalist for Forest Preserve District of Cook County, Illinois. Accomplishments include authoring the bird-illustration chapter in the GNSI Handbook of Scientific Illustration, and acting as GNSI historian since 1995.

Hawke, Richard, plant evaluation manager at the Chicago Botanic Garden. Horticultural degree from University of Wisconsin-Madison. Author of Plant Evaluation Notes, columnist for Chicagoland Gardening magazine, and recipient of the Perennial Plant Association's 2005 Academic Award for teaching excellence.

Hazen, Teresia, M.Ed., HTR, OMH, pregistered horticultural therapist and coordinator of therapeutic gardens and horticulture therapy at Legacy Health System in Portland, Oregon.

Hoover, Mary Rose, first-generation Italian American who learned how to cook from her mother and aunts, who emigrated from southern Italy. Has a lifetime of culinary experiences to share—experiences not found in a cookbook or on TV.

Humay, Priscilla, B.F.A. from the School of the Art Institute of Chicago and M.S. from the Illinois Institute of Technology. Did post-graduate study at Charles University, Prague, Czech Republic. Juried member of Landscape Artists International; worked as co-director for ARC Gallery, Chicago, and as public relations director for the Colored Pencil Society of America's National Governing Board. Her most recent awards are an Award for Excellence at the CPSA International Exhibition in Bethesda, Maryland, and first place at Midwest Color held in Illinois. Earned five-year merit signature status with the Colored Pencil Society of America, CPSA.

Husemoller, David, owner of EarthWild Gardens, dedicated to providing native plants. Serves as a consultant for the installation of prairie, woodland, and rain gardens.

Johnson, Tim, director of horticulture at the Chicago Botanic Garden. B.A. in horticulture from the University of Nebraska.

Jordon, Shelley, artist whose work "celebrates the power and beauty of domestic spaces and objects and the evanescence of time."

Joseph, Judith, painting instructor and two-time recipient of the Illinois Arts Council Artist's Fellowship Award. Specializes in the ketubah, a richly painted, hand-lettered document used at Jewish weddings. B.S. in art from the University of Wisconsin.

Kaulas, Kim, landscape designer, Kim Kaulas Inc., and board member of Landscape Design Association. Specializes in small urban spaces and shade.

Kelley, Sean, degree in landscape architecture from the University of Illinois and post-graduate studies in Oxford, England. Has traveled extensively throughout Europe visiting notable gardens; applies his appreciation of garden architecture to his classic and modern residential designs.

Kirschner, Bob, director of aquatic plant and urban lake studies at the Chicago Botanic Garden. B.S. from University of Illinois, plus more than 30 years' experience in lake and stream management as well as development of public policy relating to water resource protection.

Koziol, Nina, horticulturist and garden writer whose articles and essays have appeared in the Chicago Tribune, Chicagoland Gardening, Old-House Journal, and other magazines. Has a degree in education and environmental science and gardens on a deer-infested acre in south Cook County where butterflies and hummingbirds are summer residents.

Laiblin, Paul, project manager and senior estimator, Scott Byron and Co. Extensive experience in construction and project management and landscape design for residential, commercial, and resort landscape development. Special interest in promoting native plants and sustainable development.

Lally, Timothy, ASLA, RLA, principal of Timothy Lally Design, a landscape architectural firm specializing in residential landscape design in Chicago and the North Shore. Bachelor of landscape architecture degree from Iowa State University with 20 years of experience designing corporate, commercial, and residential projects.

Levy, Beth, custom container specialist at Chalet Nursery and Garden Shop and owner of a small residential design business. Also an active Master Gardener, volunteering at the Chicago Botanic Garden in plant healthcare and lecturing at garden clubs and civic organizations.

Limburger, Emily, assistant horticulturist for the Lakeside Gardens and horticulture intern coordinator at the Chicago Botanic Garden. B.S. in plant and soil science from Southern Illinois University.

Lyon, Ed, director of Allen Centennial Gardens, the botanical garden for University of Wisconsin-Madison. Owner of Spellbound Garden Writing & Consultation, writing for professional and public audiences. Lectures and teaches extensively in the Upper Midwest and is a regular instructor at the Chicago Botanic Garden.

Macnamara, Peggy, art instructor and author. Artist-in-residence at The Field Museum since 1990. Adjunct associate professor (2001–present), School of the Art Institute of Chicago.

Macunovich, Janet, Professional gardener, author (Designing Your Gardens and Landscape; Caring for Perennials), educator (founder, Michigan School of Gardening) and columnist (The Michigan Gardener, Fine Gardening, www.GardenAtoZ.com)

Maldonado, Maelo, ASLA, B.S. in landscape architecture from Purdue. Member of the American Society of Landscape Architects and chair of the Illinois Chapter Communications Committee. Has a background in park and recreation, commercial, land planning, and streetscape design.

Marcus, Clare Cooper, professor emerita, University of California, and principal of Healing Landscapes in Berkeley, California. Co-editor of Healing Gardens: Therapeutic Benefits and Design Recommendations and writes frequently for Landscape Architecture magazine.

Mariano, Jodi Z., senior associate at Teska Associates, Inc., in Evanston. Bachelor of fine and applied arts from the School of Landscape Architecture, University of Illinois (Urbana), and master of fine and applied arts from the School of Architecture, University of Illinois (Chicago). Member of the American Society of Landscape Architects and a registered landscape architect in Illinois. Experience in urban planning, landscape architecture, and architectural design. Has worked on transportation, recreational, commercial, industrial, and residential design projects ranging from thousands of acres to a fraction of an acre.

McMahon, Mark, artist, nationally and internationally renowned for his on-location drawings and paintings. His approach to the subject is through the eyes of an artist reporter and documentarian. Producer and director of Ceramic Tile Murals and artist-developer of a series of hand-colored silkscreens. www.mcmahonartgallery.com

Melecio, Leo, grounds supervisor at the Chicago Botanic Garden. Veteran of 27 years at the Chicago Botanic Garden. Plant care and garden maintenance expert.

Mercado, Gabriel, certified landscape technician, licensed commercial pesticide operator, and landscape construction foreman with six years of horticulture and landscape experience. He volunteers annually as a judge for the certified landscape technician testing.

Mercado, Jose, residential maintenance and project coordinator and sales, Rosborough Partners, Inc. More than 16 years of horticulture and landscape experience. Certified landscape technician and licensed commercial pesticide operator.

Montoya, Jesus, senior construction foreman, Rosborough Partners, Inc., with more than 25 years of horticulture and landscape experience. Certified landscape technician, licensed commercial pesticide operator, and member of Rosborough's safety and training committee.

Montoya, Raul, construction foreman, Rosborough Partners, Inc. with more than 25 years of horticulture and landscape installation experience.

Moss, William, Master Gardener, environmental scientist, and "greening" expert. Works as a horticultural educator to spread the good news about gardening and writes greening articles for MyOrganicGardeningBlog, Moss In The City, and William's Web. Also serves on the board of The Talking Farm. Currently appears on TV as host of HGTV's Dig In and as a CBS Early Show greening correspondent, and as a QVC gardening guest.

Mueller, Gregory, Ph.D., internationally known mycologist and former curator of fungi at The Field Museum for more than 23 years; vice president of Science and Academic Programs at the Chicago Botanic Garden.

Nakon, Steve, founder of Northwest Yoga and instructor for the yoga and meditation programs at the Chicago Botanic Garden. An inspiring teacher and health advocate. A popular conference presenter on yoga, meditation, and health and wellness; has presented at conferences as diverse as Yoga Journal Grand Geneva Conference, Green Yoga Conference, and the North American Vegetarian Society Conference. www.northwestyoga.org

Natura, Heidi, RLA, ASLA, founder and partner of Living Habitats, a firm offering landscape architecture, ecological restoration, and fine art.

Nejman, Sharon, senior horticulturist, Education Greenhouses, Chicago Botanic Garden. Came to the Garden with over 30 years of wholesale and retail green industry experience and a horticulture degree from Danville Community College in Commercial Floriculture. Has taught floral design and plant maintenance courses at Parkland Community College in Champaign.

Norman, Derek, founder, director, botanical artist, and designer for the Midwest Center for Botanical Documentation; creative director, designer, educator, faculty advisor, illustrator and co-author of six books and numerous newspaper columns.

O'Shaughnessy, Joan, ecologist for the Skokie River Corridor and interim ecologist for the Dixon Prairie. M.A. in environmental studies from Northeastern Illinois University. Has worked in Native Habitats areas at the Garden for the last 14 years.

Phillips, Ellen, extension educator in crop systems, University of Illinois Extension. B.S. in agronomy with an emphasis on soil fertility from the University of Illinois. M.S. from Iowa State University in soil management. Member of the Soil Science Society of America, the International Soil Science Society, and the American Society of Agronomy.

Pollak, Tim, outdoor floriculturist, Chicago Botanic Garden. Grower of the seasonal display annuals, containers, baskets, and specialty plant displays seen throughout the Garden. Has written and contributed to articles for newspapers, magazines, and other publications relating to many gardening topics. Earned his degree from Colorado State University in Fort Collins.

Priest, Tim, collector of suiseki for eight years and carver of custom diazas for five of them. Has been invited to display his suiseki at the Chicago Botanic Garden's Three Friends of Winter show since its inception. Has also taught diaza carving at the Michigan All State Bonsai Show for the past two years and is known as the authority on suiseki in Michigan, where the bonsai community refers to him as “The Stone Guru."

Quon, John, graduate of the Cooking and Hospitality Institute of Chicago and baker of delicious pastries and breads at the Hotel Sofitel since 2005.

Raue, Barb, current nursery supervisor and formerly a horticulturist at the Chicago Botanic Garden. B.S. in plant and soil science from Southern Illinois University. Has been at the Garden for 21 years.

Rex, Elizabeth, horticulturist at the Chicago Botanic Garden. B.S. in horticulture from the University of Wisconsin, Madison, and fine cheese connoisseur.

Rodriguez, Lynette, co-owner and horticulturist, A Finer Touch. B.S. in horticulture from UW-Madison. Previously worked on private estates and with a landscape company. Now designs, installs, and maintains landscapes. Experienced in designing and maintaining perennial gardens and four-season container plantings.

Rokach, Allen, photographer. Expert in location photography best known for his photographs of flowers, gardens, and landscapes. Served as staff photographer and director of photography at the New York Botanical Garden and as a senior photographer for Southern Living magazine. His editorial assignments include National Geographic, Audubon, Natural History,Better Homes & Gardens, Fine Gardening, Garden Design, Garden, and Horticulture magazines, and The New York Times. Coordinated the certificate program in nature and garden photography at the New York Botanical Garden and founded the Center for Nature Photography. Co-authored eight books and numerous articles on photography, travel, nature, and science.

Rutenberg, Linda, photographer, author, and educator for the last 30 years. Her work in fine art has been exhibited internationally and can be found in many prestigious collections. In 1997 opened Galerie Mistral, a fine-art photography gallery in Montreal, Canada. Author of Mont Royal—A World Apart and The Garden at Night. Lives and works in Montreal.

Sanchez, Manuel, grounds foreman at the Chicago Botanic Garden for more than 20 years. B.S. in industrial mechanics. Expert in engine repair, landscape construction, and landscape maintenance.

Scarfone, Scott C., ASLA, founder and principal, Oasis Design Group. Practicing landscape architect and certified professional horticulturist.

Selinger, Jill, manager of Continuing Education for the School of the Chicago Botanic Garden. Also an instructor for the hardy bulbs course in the Ornamental Plant Materials Certificate Program, as well as other courses. Previously worked for Synnestvedt Nursery Company and DeVroomen Bulb Company; an avid gardener who maintains an estate garden part-time.

Selinger, R. Thomas, director of design, Hursthouse, Inc. Degree in landscape architecture from Michigan State University. Program instructor for the Joseph Regenstein, Jr. School of the Chicago Botanic Garden, College of DuPage, and the Illinois Landscape Contractors Association.

Shelton, Emily, horticulturist for the research and evaluation gardens at the Chicago Botanic Garden. B.S. in horticulture from Missouri State University.

Sherwood, Heather, senior horticulturist, English Walled Garden, Chicago Botanic Garden. B.S. in horticulture from Iowa State University. Her passion for gardening was cultivated in Laytonsville, Maryland, where she worked for a cut-flower grower and a small public garden before going to college.

Shores, Bill, manager of garden management and design business focusing on intensive, small-scale gardening systems. More than 12 years of experience designing and running organic commercial food gardens, designing urban landscapes, and teaching intensive techniques. Works with clients to utilize their indoor and outdoor urban spaces for food production, edible landscaping, and native plantscapes.

Siegel, Julie, owner of J. Siegel Designs, Inc. and president of Midwest Ecological Landscaping Association. A teacher and public speaker for many years; very involved with various community, environmental, and social projects.

Siegel, Leora Ornstein, M.S. in library and information science and M.S. in natural resources and environmental sciences, both from the University of Illinois at Urbana-Champaign. Manager of the Lenhardt Library of the Chicago Botanic Garden, where she has worked in various capacities over the last seven years. On the board of directors of the Council on Botanical and Horticultural Libraries (CBHL) and the North Suburban Library System (NSLS).

Smith, Gilbert, co-owner of Arborsmith, Ltd. University-educated, certified arborist who has been caring for trees on the North Shore of Chicago for more than 40 years. Smith has been featured in Better Homes & Gardens' Do It Yourself magazine for his own home garden.

Smith, Lesley Bruce, co-owner of Arborsmith, Ltd. University-educated, certified arborist who has been caring for trees on the North Shore of Chicago for more than 40 years. Smith has been featured in Better Homes & Gardens' Do It Yourself magazine for her own home garden.

Sollenberger, Dave, seed bank conservation specialist for the Seeds of Success National Tallgrass Prairie Seed Bank. Chicago Botanic Garden restoration ecologist of the Dixon Prairie for 25 years. B.S. in botany at Southern Illinois University-Carbondale.

Stack, Greg, extension horticulturist providing leadership in horticultural programming for both homeowners and commercial horticulturists with emphasis in the area of herbaceous ornamentals. B.S. and M.S. in ornamental horticulture from the University of Illinois. Actively involved in the development of horticulture websites, flower show exhibits, and youth horticulture programs.

Steffen, Amy, naturalist.

Sternberg, Guy, arboretum manager, consultant, and lecturer. Bachelor's degrees in horticulture and landscape architecture from Purdue University. Numerous articles and photos featured in such publications as American Nurseryman, Arborist News, and Tree Care Industry, among many others.

Stevens, Jessie, photographer in the Chicago area. Degree in horticulture. Her work combines photographic skill, scientific knowledge, and a passion for nature. Exhibited at the Pilsen East Artists' Open House in 2008; work purchased for Rush Memorial Hospital's new patient rooms.

Stewart-Pyziak, Marcy, horticulturist, The Gardener's Tutor.

Story, David, certified arborist and manager of Bartlett Tree Experts' Northbrook, Illinois, office. B.A. from Cornell University in 1976. Primary work is consulting with residential and commercial clients, to implement comprehensive tree-management programs, including tree-preservation programs. Member of ILCA board of directors, and MidAm board of directors.

Thomas, Cathy, propagator at the Chicago Botanic Garden. B.S. from Northwestern University.

Thomas, Kay, Japanese ink painting instructor. B.A. from Duquesne University, with extensive Japanese ink painting and Chinese painting, watercolor, oil, crafts, and other experience.

Thomson, Karen, B.S. in horticulture from Iowa State University. Owns and operates a home-based business called Thomson Topiaries, L.L.C. Published in various local newspapers as well as in Better Homes & Gardens and Midwest Living magazines, including the April 1999 cover story. Specializes in giving lectures and workshops on topiary construction and care.

Tiddens, Tom, plant healthcare supervisor at the Chicago Botanic Garden. M.S. in natural resources and environmental sciences from the University of Illinois and B.S. in engineering from Northern Illinois University.

Trabka, Greg, new product development manager with Ball Horticultural Company. Master's degree in ornamental horticulture and a master's degree in the integrative business management from Michigan State University. More than 20 years of experience in plant production and wholesale and retail trades, as well as in marketing.w

Tonietto, Rebecca, graduate student in the Plant Biology and Conservation program offered by Northwestern University and the Chicago Botanic Garden. Completed her M.S. at the Garden and Northwestern, comparing the bee communities of green roofs to city parks and restored prairies. Her Ph.D. research is investigating the effects of prairie restoration on native bee communities.

True, Jeffrey, vice president for operations for Hursthouse, Inc., Landscape Architects and Contractors. More than ten years of experience and a degree from the University of Illinois in ornamental horticulture. Frequent lecturer at the Chicago Botanic Garden, Morton Arboretum, College of DuPage, and the Illinois Landscape Contractors Association.

Valauskas, Edward, lecturer in the Graduate School of Library and Information Science at Dominican University, where he teaches classes about the history of the book, information policy, and technology.

Van Wassenhove, Chris, president, Chicago Audubon Society.

Watters, Ivan, artist and curator of the Chicago Botanic Garden Bonsai Collection, teacher for many years, and recipient of numerous bonsai awards.

Weidner, Shawn, landscape designer, primarily in the Chicago area for the past five years. Graduated from The Ohio State University with a B.S. in landscape architecture (minoring in business and horticulture). Worked as senior landscape designer/project manager of Chicago Specialty Gardens. Currently serves as director of design for Ecogardens, overseeing all design and management of rooftop gardens, green roofs, and landscape garden projects.

Weiss, Nina, nationally recognized artist who has been painting and drawing the landscape for more than 25 years. B.F.A. from the Tyler School of Art and K-12 Art Education Certification from the University of Wisconsin, Madison. Awarded an artist's residency at the Ragdale Foundation in Lake Forest, Illinois, In 2007; artist-in-residence at Acadia National Park, Main, in 2005. In addition to teaching workshops throughout the Midwest, travels to Europe every summer to conduct European Landscape Workshops.

Welch, Patsy, artist and educator. B.F.A., painting, cum laude, University of Tennessee; advanced study of painting and fresco, Ecole des Beaux-Arts, Paris, France; M.Arch., University of Wisconsin-Milwaukee. Previously a watercolor instructor at the Evanston Art Center, the Suburban Fine Arts Center, and Hull House.

Wilhelm, Gerald, Ph.D., principal and director of environmental services, Conservation Design Forum, Inc. Much noted for his coauthorship of Plants of the Chicago Region with the late Floyd Swink, a preeminent botanist in the field of floristics.

Williams, Rachael, principal landscape designer with Northwind Perennial Design Group. Formerly a horticulturist at the Chicago Botanic Garden for eight years. Associate's degree in horticulture. Studied landscape design at Kew Gardens.

Wittig, Jane, steward, Reed-Turner Woodland Nature Preserve, Long Grove, Illinois.

Wood, Daniel, instructor for Chicago Botanic Garden, ILCA, FLDA, the Miami-Dade Community College Environmental Center, Fairchild Botanical Garden, and Leu Botanical Garden, with more than 25 years of experience in the landscape industry.

Yiesla, Sharon, horticulturist with University of Illinois Extension in Lake County since 1993. B.S. in horticulture, Purdue University. M.S. in horticulture, University of Illinois at Urbana-Champaign. Author of Shade Trees for the Central and Northern United States and Canada.

Zampardo, Mark, Ph.D., coordinator of horticulture, College of Lake County, for 28 years. Published several magazine articles and one book, soon to be published, on perennial flowers. Led several course trips to England to study gardens.