Arboretum Bulletin

Our full-color horticultural and botanical magazine

Published since 1937, the Washington Park Arboretum Bulletin is a quarterly botanical and horticultural magazine. A benefit of Arboretum Foundation membership, it includes in-depth articles on the Arboretum collections and history, as well as general information of interest to botanists, gardeners, and plant lovers in the Pacific Northwest and beyond.

You can also purchase the Bulletin at the Arboretum Gift Shop for $5 per copy.

Summer 2026

CONTENTS

Page 2  The “Slow” Season — Christina Owen

Page 3  CONSERVATION CORNER: Large-Winged Wingnut — Christina Pfeiffer

Page 6 HIDDEN TREASURES OF THE ARBORETUM: Fabiana imbricata f. violacea — Cynthia Welte

Page 9 Symbiotic Marvels: Get to Know the Small but Mighty Lichens of the Arboretum — Katherine Glew

Page 14 ART OF NATURE: The Photography of Morgan Brackett

Page 16 Plantsman Mike Lee: A Fond Reminiscence — Arthur Lee Jacobson

Page 19 Arboretum Trees Used to Make Household Goods — Jason Morse

Page 23  PLANT ANSWER LINE: Fragrant Hydrangeas — Rebecca Alexander and Niall Dunne

Page 26  IN A GARDEN LIBRARY: Award-Winning Plant and Garden Books — Brian R. Thompson

COVER PHOTO: Morgan Brackett

Thanks to Our Sponsor!

The summer 2026 issue of the Bulletin was made possible by:
The Berger Partnership

For information on advertising/sponsorship opportunities—or to submit an article idea—please email the editor, Niall Dunne, or call him at 206-325-4510.

Bulletin Archive

Back issues of the Bulletin can now be viewed online for free at the Biodiversity Heritage Library. The digitization was paid for by a grant from the Institute of Museum and Library Services. We also publish select articles from past issues of the Bulletin on our news blog.