Scientifically Accurate

Tree & Botanical Illustrations



Trusted for over 30 years with 2,000+ illustrations spanning 600+ species



Supporting municipalities, nonprofits, universities, corporations, and conservation organizations worldwide.

Robert O'Brien Design specializes in botanical illustration, tree guides, and natural history artwork built from over 30 years of expertise. Our library of more than 2,000 detailed illustrations spanning 600+ species has supported municipalities, nonprofits, educational institutions, corporations, and conservation organizations across the United States and internationally. Combining scientific accuracy, artistic craftsmanship, and a multigenerational legacy, illustrator Kelly O'Brien continues expanding this body of work for modern print and digital applications.
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Licensing • Guides • Custom Projects

clients

For over three decades, our illustrations have supported municipalities, universities, conservation organizations, nonprofits, corporations, and government agencies across five continents. Our client list reflects decades of trusted work in education, forestry, conservation, research, and natural history.
Robert O'Brien was one of America's most prolific natural history illustrators, specializing in scientifically accurate tree and botanical artwork. Over more than three decades, his illustrations have supported field guides, education, conservation initiatives, interpretive displays, publications, and municipal projects across five continents. Today, this legacy continues through his eldest daughter, artist and illustrator Kelly O'Brien.
Photograph by Kelly O'Brien

About the Founder, Robert O'Brien

Botanical Illustration

Expertly crafted scientifically accurate tree and plant artwork that combines meticulous botanical detail with artistic precision, enhancing educational value and visual appeal for both academic and decorative purposes.
Educational Tree Guides
Licensing

Educational and municipal publications serve as authoritative resources that disseminate vital information, promote community engagement, and support informed decision-making within academic and local government sectors.

Illustrations for print, digital, and commercial applications, including expertly crafted visuals tailored for educational and municipal publications to enhance clarity, engagementand impact.
Educational & Interpretive Displays

Museums, parks, conservation efforts, and informative signage collectively play a crucial role in preserving cultural heritage, promoting environmental stewardship, and enhancing public education and engagement.
request a quote
Licensing • Guides • Custom Projects
O'Brien's work is intricate, scientifically accurate and accessible. He creates vibrant, miniature facsimiles that are as artful as they are encyclopedic.
Karen Calvert, Curator The Austin Corporate Art Collection, Austin, Texas
With O'Brien's absolutely stunning and botanically correct illustrations, our agency gets rave reviews of all of his work. He makes us look great.
John Giedraitis, Urban Forestry Coordinator Texas Forest Service
Bob and I worked together, week after week, for over 15 years, often on very tight deadlines. He was great to work with as a team member, contracted as a freelance illustrator and graphic designer by our company to help us educate our customers on the value of trees in a utility frame of reference. His beautiful artwork and graphics have been very well received by our customers over the years, helping us create likely some of the most popular publications in our company's history.
Lisa Randle, Corporate Communications Pacific Gas & Electric Company San Francisco, California
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