Scientifically Accurate

Tree & Botanical Illustrations



2,000+ illustrations

600+ species illustrated

Trusted for 30+ years

Used by municipalities, nonprofits, universities,

and conservation organizations

Licensing, guides, publications, and custom projects



DISCUSS YOUR PROJECT
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.
Botanical Illustration

Scientifically accurate artwork for publications, education, and research.
Educational Tree Guides
Licensing

Educational materials for municipalities, nonprofits, and institutions.

Artwork licensing for print, digital, and commercial projects.
Educational & Interpretive Displays

Museums, signage, displays, conservation initiatives, and specialized work.
discuss your project
Licensing • Guides • Custom Projects
Robert O'Brien was one of America's most prolific natural history illustrators, creating scientifically accurate tree and botanical artwork for over three decades. His illustrations have supported education, conservation, field guides, and public institutions 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

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.
John Giedraitis, Urban Forestry Coordinator Texas Forest Service
His beautiful artwork has been very well received by our customers over the years, helping us create 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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