The outdoor preschool at the Washington Park Arboretum aims to counteract “nature deficit disorder.”

On November 21, 1993, which was a rainy blustery Sunday afternoon, we dedicated “The New Zealand High Country”, the first Arboretum garden of New Zealand natives.

Recent test results from Washington State University Puyallup Plant & Insect Diagnostic Laboratory confirmed the first case of Dutch Elm Disease (DED) in the core area of the Washington Park Arboretum.  The tree, a 45 year old Guernsey Elm (Ulmus minor ‘Sarniensis’), had been suffering from mechanical injury to the root crown and annual infestations of the Elm Leafminer, an insect that that feeds on elm leaves.  

Cornucopia
1)  Betulaceae          Carpinus japonica, Corylus colurna, Ostrya carpinifolia

Nut-bearing, often enclosed in interesting husks, cones or bracts.

2)  Fabaceae            Colutea orientalis

Legumes, which are dry fruit in pods that dehisce (open along a seam).

3)  Gunneraceae         Gunnera manicata

The fruit-bearing conical spike can reach 6 feet in length.

4)  Magnoliaceae        Magnolia grandiflora, M. officinalis var. biloba, M. sieboldii

Cone-like fruits, from green to red, open to display bright orange seeds. 

1)    Aralia elata (Japanese Angelica Tree)

Natural range: Japan, Korea, Russian Far East
Can be a tree more than 30 feet tall. Ours are multiple suckers from a spreading root system.
Located north of the Wilcox footbridge (40-3W).

2)   Bupleurum fruticosum

A dense, multi-stemmed shrub tolerant of exposure and poor soil.
Native to Southern Europe and the Mediterranean.
Located in our Rock Rose area west of the Sorbus Collection (21-3E). 

After a year of surveying Washington Park Arboretum grid points and digitizing paper maps we have made substantial progress on our georeferenced database project. See photos and a video of Botanic Gardens Director Sarah Reichard.

“Can You Smell That Smell?”
1)   Clerodendrum trichotomum (Peanut-Butter Tree)

Repugnant, peanut-butter odor when leaves are bruised!
Cats are attracted to the smell.
See our suckering forest of young trees along the path leading down to the WPA horticultural crew barn.

2)   Prostanthera cuneata      (Alpine Mint-Bush)

This low-growing shrub is from Australia and is in the Mint family.
When leaves are crushed, they emit a strong fragrance that some liken to eucalyptol and smelly socks. 

In the midst of our dry NW summer, while many plants look worse for wear, our native evergreen Salal shrubs, Gaultheria shallon, are shiny and healthy. Salal flowers in the spring with pinkish-white bell-shaped flowers in groups of 5-15 on racemes; very similar to the Pieris japonica flower. Both plants are in the Ericacea family. The Salal shrub can grown to 16′ tall and forms a dense mass that creates habitat and food for local birds and animals. 

“Quirky Oaks”
1)   Quercus x bushii ‘Seattle Trident’
(Seattle Trident Hybrid Red Oak)

Cultivar of a Black Oak and Blackjack Oak hybrid.
Developed in Sir Hillier Gardens and Arboretum in England from scion wood collected at Washington Park Arboretum.
Located in the Oak Collection, northwest of Azalea Way service road intersection.

2)   Quercus dentata     (Daimyo Oak)

Asian native (China, Korea, Japan, Mongolia)
Develops an unusually large leaf; occasionally used as a vegetable in native range. 

Pacific Connections Garden Stewards made history on June 20th when they planted the New Zealand High Country plants into the new Bollard Garden in the new  forest. They planted several species well over 20 years old. These include Nothofagus solanderi, Griselinia littoralis, Phyllocladus alpinus, Phormium colensoi, and Dodonaea viscosa. In addition to the Bollard Garden (aka The New Zealand High Country Display), the garden will include the Hebe Meadow, the Griselinia Bush, the Mountain Tussock, Snow Tussock, the Silver Beech Forest, the Phormium Fen and the Mountain Beech Zone.