Arboretum Bulletin

Header photo: River otter in the Arboretum wetlands (courtesy Larry Hubbell).

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.

Spring 2022

CONTENTS

Page 2  Spring Endeavors—Jane Stonecipher

Page 3  Hardy Rubber TreeWalt Bubelis

Page 5  HIDDEN TREASURE OF THE ARBORETUM: Climbing Hydrangea—Niall Dunne

Page 8  How Vines Attach to a Support System—Pat Roome

Page 9 Snakebark Maples in the Arboretum—Phil Wood

Page 14: Japanese Cleyera: Shintō’s Sacred Flowering Evergreen—Corinne Kennedy

Page 18: Gauging Resistance: My Azalea Lace Bug Research in the Arboretum—Ryan R. Garrison

Page 5  PLANT ANSWER LINE: Plants That Look and Taste Like Spinach—Rebecca Alexander

Page 26  IN A GARDEN LIBRARY: New Books for Northwest Gardeners—Brian R. Thompson

Thanks to Our Sponsors!

The spring 2022 issue of the Bulletin was made possible by:

Carol Ottenberg
Molbak’s
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.

Earth Day Volunteers Pull 50+ Cubic Yards of Weeds!

Earth Day Volunteers Pull 50+ Cubic Yards of Weeds!

A total of 116 volunteers participated in our annual Earth Day at the Arboretum work-service event on April 23. They removed more than 50 cubic yards of ivy, blackberry, and other invasive weeds from plant collection beds and natural areas—covering a combined area of...

Arboretum-Based Research Tackles the Azalea Lace Bug

Arboretum-Based Research Tackles the Azalea Lace Bug

Since 2015, the invasive azalea lace bug (Stephanitis pyrioides) has been causing serious damage to azaleas and rhododendrons in our state, including in the Arboretum. A tiny aphid relative, the lace bug removes chlorophyll from Rhododendron foliage, weakening the...

Wild and Wonderful Willows of the Arboretum

Wild and Wonderful Willows of the Arboretum

Beautiful willows, such as the Salix gracilistyla 'Melanostachys' pictured here, are blooming in the Arboretum's Witt Winter Garden and beyond. In the latest issue of the Arboretum Bulletin, writer and estate gardener Daniel Mount discusses the wild and weedy willows...