Apr 19, 2021 / Washington Park Arboretum, Horticulture, News / UWBG Horticulturist, David Zuckerman

“Magnificent Magnolias!”

Close-up photo of Magnolia 'Carhaeys Belle'

If you missed our peak magnolia bloom, you can extend their beauty virtually here enjoying several wonderful photos of a few of my personal favorites.  Many thanks to both Niall Dunne – Arboretum Foundation Communications Manager and Bulletin editor, Ray Larson – UW Botanic Gardens Interim Director and Skylar Lin – PSGO aerial photographer for sharing their extraordinary photos capturing these magnificent magnolias in bloom! 

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Apr 13, 2021 / Rare Care, Research, News / Wendy Gibble

Unraveling the Mysteries of Seeds

Sometimes it takes a while to unravel the mystery of seeds; other times they present no mystery at all. Take showy stickseed (Hackelia venusta) seeds as an example of the former. The germination ecology of showy stickseed was for years a mystery. Traditional propagation techniques using cold stratification yielded poor germination rates. Researchers experimented with various scarification techniques (altering the seed coat by weakening or creating an opening) and gibberellic acid, a plant growth hormone, to stimulate germination. 

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Apr 7, 2021 / Rare Care, News / Stacy Kinsell

Conserving plants by investing in people

It’s an early winter morning at the Center for Urban Horticulture greenhouse. While the sun considers rising, Sarah Shank greets her seedlings. Fueled by a passion for growing plants and her first cup of coffee, she describes her quiet mornings watering rare native plants as the perfect way to begin her workday. The current plants she tends to, Astragalus sinuatus (Whited’s milk-vetch) and Eriogonum codium (Umtanum buckwheat), she grew from seed and each day begins with observing them. 

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April 2021 Plant Profile: Metasequoia glyptostroboides, aka Hobbit trees

Metasequoia glyptostroboides trunk with grooves

The mysterious case of X-478*A and B, a.k.a. “Hobbit trees”, continue to baffle and impress those who are familiar with these two unique Arboretum Dawn Redwoods.

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Mar 29, 2021 / Washington Park Arboretum, Horticulture, News / Darrin Hedberg, UWBG Horticulturist

“Firs Things Firs”

Close-up photo of Algerian Fir

1)   Abies bornmuelleriana                                                                Turkish Fir

This species is allied to the Caucasian Fir (A. Nordmanniana), but with some characteristics of the Greek Fir (A. cephalonica), notably the resinous buds and glabrous shoots.
It has a small range in northwestern Asia Minor, where it forms forests on the Bithynian Olympus.
With regards to our collections at the Arboretum, we have a few specimens in the Northwest Pinetum, as well as the one shown here residing below the Pacific Connections New Zealand Garden. 

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Mar 24, 2021 / News / Clare McLean

Coppicing: The Endless Gift of Trees

A millennia-old arboricultural practice is alive and well at the SER-UW Native Plant Nursery: Coppicing. 
Humans have coppiced trees for 10,000 years, estimates esteemed arborist and author William Logan Bryant. His recent book, Sprout Lands: Tending the Endless Gift of Trees, details this traditional practice with passion and reverence.
In the pre-Industrial era all over the globe, coppicing was the cutting back of a tree or shrub close to ground level in order to obtain a crucial, life-giving harvest: stems, canes and branches to be used for firewood, to build fences, furniture and bridges, and to produce baskets and rope, among many other essentials. 

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Mar 8, 2021 / Washington Park Arboretum, Horticulture, News / UWBG Horticulturist, Joanna Long

Signs of Spring at the Washington Park Arboretum

Photo of Sierra Laurel

1)  Leucothoe davisiae                                                                                   Sierra Laurel

This evergreen member of the Heath family is native to the mountains of eastern and northern California where it grows in bogs and seeps.
The hot-pink buds will open in spring to reveal white urn-shaped flowers.
You can find Leucothoe davisiae in the Cascadia Forest.

2)  Magnolia sargentiana var. 

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Mar 1, 2021 / Washington Park Arboretum, Plant Profiles / Joanna Long, Pacific Connections Horticulturist

March 2021 Plant Profile: The Gaultherias of Pacific Connections

close up of leaves

The Pacific Connections Gardens is a great place to admire examples of related plants from different parts of the globe. One excellent example of this is the genus Gaultheria. Only a few steps separate Gaultheria species hailing from Chile, China, and the Pacific Northwest!
The genus Gaultheria includes over one hundred and fifty species hailing from North and South America, Eastern and Southeastern Asia, New Guinea, Australia, and New Zealand. 

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Feb 12, 2021 / Washington Park Arboretum, Horticulture, News / UWBG Horticulturist, Ryan Garrison

Examples of the Plant Collections Network at the Washington Park Arboretum

Photo of Paperbark Tree bark

Several genera at the Washington Park Arboretum are part of a multi-site nationally-accredited plant collection administered through the Plant Collections Network of the American Public Gardens Association. The Plant Collections Network is one of the most significant networks of cultivated living plant collections on Earth and is used for taxonomic studies, evaluation, breeding, and other research. The Network stewards diverse living collections at public gardens across North America to safeguard plants and share them with the world. 

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New Year, New Tree: Winter Plant Sale at the SER-UW Nursery

Whether you’re aiming to beautify your yard or hoping to decrease your soil erosion rate, planting a tree would offer benefits beyond your intention. Trees are the foundation of maintaining a sustainable wellbeing. When you plant a tree, you are providing a new source of oxygen, introducing an efficient way to rid the air and soil of pollutants, and contributing to habitat in tree canopies for wildlife. 

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