Winter Garden Project: Remodeling the “Living Walls”

August 20th, 2014 by UWBG Horticulturist

Arboretum Tree Removal Notification:

 

The week of 8/25/14, UWBG tree crew will embark on a project located in the Winter Garden (read about project below). 

4 western red cedars will be removed due to negative impact to plant collections and garden encroachment. 

All pedestrian path detours and other safety considerations will be handled by tree crew. 

If possible, cedar logs will be salvaged for future park uses.  

UW professor of landscape architecture and designer of our Winter Garden (1987), Iain Robertson, states it’s time to open up the “room” that has been closing in on the Winter Garden for over 25 years. Continuous growth of the “living walls”, predominantly western red cedars, is now negatively impacting many of the garden’s choice plant collections. Due to this encroachment, the garden “room” is feeling confining. Judicious consideration and deliberation has led to the following curation and horticultural decisions.

Project Scope:

  • Removal of 4 western red cedars to provide needed light and future growing space for plant collections. In all cases, the “room’s walls” will expand, yet filled in by existing trees in the background to continue to provide the experience of being in an enclosed space.Pruning of several other cedars to provide light and future growing space for plant collections.
    • 2 on the west side in the “twig bed”
    • 1 on the south side next to the Chinese red birch grove
    • 1 on the east side growing over several camellias and other collections
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August Color Appears at the Washington Park Arboretum

August 17th, 2014 by Kathleen DeMaria, Arboretum Gardener
Selected cuttings from the Washington Park Arboretum (August 11 - 24, 2014)

Selected cuttings from the Washington Park Arboretum (August 11 – 24, 2014)

1)   Poliothyrsis sinensis

  • A rare and very attractive small flowering tree of upright, open habit.
  • Originally brought from China to the Arnold Arboretum by E.H. Wilson.
  • Big 6-8” mildly fragrant, creamy flower clusters (corymbose panicles) make a significant contribution to the August-September garden.
  • Located in grid 30-3E, near the south entrance to the Woodland Garden along Arboretum Drive.

2)   Daphniphyllum macropodum

  • This dioecious plant (translation = “of two houses”) needs plants of both sexes to seed.
  • Our largest grouping sits in grid 7-2E.  This area was recently renovated for the New Zealand Garden construction, allowing more light and air to these plants.
  • Purplish-red petioles, copious berries and leaves arranged in tight spirals make this one of the most asked-about plants in the Washington Park Arboretum.

3)   Veronica salicifolia   (Hebe salicifolia)

  • Is it a Hebe? Is it a Veronica?  Just wait and it might change again!
  • Large, spear-shaped, white flowers populate this New Zealand native in late summer.
  • Salicifolia = “leaf like a Salix (willow)”, hence the common name willow-leaved hebe.

4)   Buplerum fruitcosum

  • This evergreen shrub in the carrot family has striking leathery blue-green foliage.
  • Long-lasting, umbels of greenish-yellow flowers bloom in late spring/early summer.
  • Flowers are highly attractive to a number of predatory insects that feed on aphids and other garden pests.

5)   Argyrocytisus battandieri

  • Commonly called Pineapple Broom, this pea-family plant produces yellow flowers atop blue-gray foliage.
  • Native to Morocco, this plant grows best in full sun and well-drained soil.
  • Located along the west side of Arboretum Drive in grid 16-5E.
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The “Lost” Enkianthus Grove in Washington Park Arboretum

August 8th, 2014 by UWBG Horticulturist

Does anyone reading this know where our arboretum’s “lost” Enkianthus grove is located? By “lost”, I mean extremely well-hidden under a dense canopy of western red cedars and other trees.

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Enkianthus specimens previously “lost” in the overgrowth.

Enkianthus are shade-tolerant shrubs, but NOT “black-hole” shade tolerant. Like most living plants, they do need light to grow and thrive.  It’s a bit embarrassing, but I can honestly say, during my 30 plus year tenure on the UWBG horticulture staff, I don’t recall ever working in the area for longer than maybe a day cleaning up after a storm or pruning a few of the bigger trees. And, we definitely did not pay any attention to the main attraction – a grove of over 50 Enkianthus specimens, mostly all E. campanulatus (red-vein enkianthus) and over 70 years old! Well, the answer to the question above is Rhododendron Glen, encompassing several grid maps (14-2E, 14-3E and 15-3E).

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Accession number 2352-37, this Enkianthus campanulatus was planted in 1937.

Now for the good news. Thanks to funding designated for Rhododendron Glen, our horticulture staff has taken on the project to restore the grove for all to be able to once again, after a very long hiatus, enjoy its natural beauty and splendor throughout the year.

The project scope includes the following to improve the health and display of the Enkianthus grove:

  • Increase light conditions through selective understory brush clearing, tree removals and pruning
  • Open view corridors and a cleared natural pathway for visitors to walk from the upper Rhododendron Glen pond area down to the lower “Lookout” pond
  • Improve health of the Enkianthus through practicing sound horticulture: mulching, watering and fertilizing the grove

For more information about the ornamental shrub, Enkianthus campanulatus, go to Wikipedia website below:

http://en.wikipedia.org/wiki/Enkianthus_campanulatus

 

 

 

 

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Explore! Art, Bugs, Mosses and Sustainable Landscapes!

August 5th, 2014 by Sasha McGuire, Education Program Assistant

2014Catalog_Summer_Fall_Cover_smallGrab a copy of our new Summer/Fall catalogand try your hand at botanical art, discover the microscopic worlds of insect and moss identification, or learn how to turn your backyard into an sustainable, eco-friendly paradise!

Landscape for Life: Sustainable Home Gardening

Are you a homeowner who wants to create and maintain your own healthy, sustainable landscape? Through instructor-led presentations, class discussions, and activities, this 4 part class will deepen your understanding of how to get the most out of water in your garden, build healthy soils with minimal outside inputs, use native and climate-adapted plants for the Pacific Northwest, and find the most environmentally-friendly landscape materials. Students will analyze their own home landscape focusing on soils, water, plants, and use of materials.

Four Thursday evenings, starting September 25, 6-8:30pm
More information…

Register online or call 206-685-8033

 

 

Botanical Watercolor or Botanical Art Weekend Workshop

botwatercolor

Botanical Watercolor:  7 Tuesdays – starting September 23, 7 – 9:30pm
Learn how to create stunning watercolor portraits of your favorite flowers or trees with this class taught by long-time instructor Kathleen McKeehen. Topics covered include drawing, measurement, color mixing, controlled washes and dry-brush techniques.  Whether you are just starting out, or have taken some classes before, all skill levels are welcome.

More information…

Register online or call 206-685-8033

vorobikorchid

 

 

 

 

 

 

Botanical Art Weekend Workshop: Saturday and Sunday October 4-5, 9am – 5pm
Learn the basics for creating botanical illustrations from professional botanist, illustrator, and teacher, Dr. Linda Ann Vorobik. Through lecture, demonstration and hands-on work, this class provides instruction in pencil drafting, pen & ink, and watercolor. All skill levels welcome.

More information…

Register online or call 206-685-8033

 

 

bugBugs: Bad, Beneficial, and Beautiful

Have you ever wondered about the 900,000 species of insects that roam the earth? Discover a few of them in this 4-part course on Thursday evenings. Learn about ID, life cycles, and how to live with the beneficial and bothersome insects that you may come across in your daily life. This class won’t be just lectures, though; we will have hands on periods, with practical demonstrations, specimens to examine, and reference resources. Don’t miss this fascinating class taught by Evan Sugden, entomologist, teacher, and illustrator!

Thursday, October 30, 7 – 9pm
More information…

Register online or call 206-685-8033

 

Introduction to Mosses

mossesWhile strolling in the woods, or walking around town, are you intrigued by the tiny green plants along the way? Do you wonder exactly what they are? Here is an opportunity to take a closer look at one group of small plants, the mosses.  This workshop, designed for beginners, will help you understand the basics of moss structure and biology, as well as the characteristics useful for identification. In the morning we will work in the class room for about 3 hours. After lunch we’ll take a walk in the Arboretum, and then finish up in the classroom.

Saturday, October 25, 9am – 3:30pm
More information…

Register online or call 206-685-8033

Want to see what else we have going on this season? Check out our full catalog!

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Where in the Arboretum? New interactive map answers that question.

August 5th, 2014 by Tech Librarian, Tracy Mehlin
map screenshot

A screen shot of the interactive map with pop-up detail for the tree Toona

A visitor to the Washington Park Arboretum recently wondered if the “tuna” tree grew among its world class collection of woody plants. She asked a staff member who figured out she meant Toona sinensis, a hardy member of the mahogany family with bright pink new growth. “Yes, we have three specimens.” replied Laura Blumhagen, working at the reference desk in the Miller Library. “Where?” asked the visitor. Laura searched the brand-new interactive map, located the Toona trees and directed the visitor to the northwest corner of the Arboretum where Lake Washington curves around near the off ramp from State Route 520.

The online, interactive map identifies landmarks, trails, gardens and most importantly every woody plant growing in the Arboretum. It can be browsed or searched. Users can turn layers on and off, measure distances, draw a custom route and print out a custom map. Zooming into the map reveals thousands of green circles that represent trees and shrubs. Click on a circle to learn the plant’s name and other data related to that individual specimen.
UW Botanic Gardens Director, Professor Sarah Reichard, envisioned a system where public visitors could gain a deeper appreciation of the value of the collections and the story behind each tree, as well as improve management efficiency. “The integration of the existing database and new map has exceeded my expectations” said Dr. Reichard.

In August 2012 the University of Washington Botanic Gardens received a grant from the Institute of Museum and Library Services to survey the Arboretum and digitize paper inventory maps. That groundwork enabled the development of a geo-referenced database and a publicly accessible, interactive map. Prior to this project, the paper inventory maps were arduous to update, impossible to search and inaccessible to the public and most staff. Surveying the Arboretum with modern equipment and digitizing inventory maps increased the accuracy of plant location data and decreased the effort to locate plants. Staff management of the collection has improved because time spent searching for plants can now be used caring for them. Docents save time creating seasonal tours by searching the map for trees of interest. The map integrates not just location information, but data about the plant’s name, origin, native range, health condition and the id number for the pressed plant specimen in the Hyde Herbarium.

Articles and posts about the mapping project

Arboretum Bulletin article about the history of mapping at the Arboretum and how the interactive map was created.
IMLS grant funds geo-referenced, integrated database
In the Arboretum with the total station and other milestones
How would you use an interactive map in the Arboretum?
About the map and credits

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A glimpse into the past – new buildings for visitors and crew

August 4th, 2014 by UWBG Communication Staff
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Looking east, new sewer lines were installed behind the old apartment (aka barn).

By John A. Wott, Director Emeritus

The first buildings to be added to the grounds of the Washington Park Arboretum were begun in 1985, as defined in the Jones and Jones Master Plan Update for the Washington Park Arboretum. It took almost ten years for the building plans to be finalized and the funds to be raised. The public building was named the Donald B. Graham Visitors Center, and it housed offices, meeting spaces, public information space and a gift shop.

The Arboretum Foundation conducted the fund raising campaign, with the City of Seattle Parks Department supervising the project.

The original Works Progress Administration-constructed office/crew building was razed. A near-by large barn/apartment building was converted into the current crew headquarters and shop, with the upstairs apartment eventually being converted to office space. A new machine storage shed was added and the terrain of the land greatly changed.

The photographs taken March/April 1985 show sewer work and the building foundation and beginning walls of the storage shed. The new facilities were dedicated in 1986.

 

 

 

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Looking north to the new shed under construction and re-purposed apartment (aka barn).

phptp

Walls for the new storage shed being poured.


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August 2014 Plant Profile: Aeonium arboreum var. atropurpureum

August 4th, 2014 by Soest Gardener, Riz Reyes

Aeonium 1Succulent plants continue to be very popular amongst gardeners everywhere because of their unusual and architectural forms and thriving with very minimal watering. The Aeoniums are one of the most iconic of all succulents. Unfortunately, they are not hardy in the Pacific Northwest, but they are excellent container specimens that are actually pretty easy to overwinter if cared for properly indoors.

The key to success with any succulent is bright light, very well-drained soil and limited watering during the growing season. They respond to being fertilized on a regular basis during active growth (for us it’s June-September) and then as cold temperatures approach, they are dug up before the first frost and potted up and kept indoors where it can stay cool, but not freezing. Some growers overwinter them “bareroot” and will mist them occasionally so they don’t dry out. The more light you can give them during this pseudo-dormant period the better.

Aeonium 2

Family: CRASSULACEAE
Genus: Aeonium
species: arboreum var. atropurpureum
Common Name:  Tree Aeonium, Irish Rose, Houseleek
Location: Containers in Soest Garden
Origin: Straight species from Canary Islands, but this selection may be of garden origin.
Height and Spread: 1.5ft wide to 2ft. tall (potentially much larger in milder climates)
Bloom Time: N/A for Pacific NW outdoors (but may flower later winter/early spring if greenhouse-grown)

 

 

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July Color Appears at the Washington Park Arboretum (Part II)

August 4th, 2014 by UWBG Arborist, Chris Watson
Selected cuttings from the Washington Park Arboretum (July 21 - August 8, 2014)

Selected cuttings from the Washington Park Arboretum (July 21 – August 8, 2014)

1)   Houpu Magnolia    (Magnolia officinalis var. biloba)

  • Unique bi-lobed leaf 8-12″ in length
  • 4-8″ seed pods on display in late summer
  • Located in grid 27-1W in the Rhododendron hybrid bed

2)   Sargent Magnolia    (Magnolia sargentiana var. robusta)

  • Bears large pink flowers in spring
  • Large, pinkish-red fruit appear in late summer and fall
  • Located in grid 13-7E in Rhododendron Glen

3)   Rehder Tree    (Rehderodendron macrocarpum)

  • White flowers appear in spring
  • 3-4″ seed pods weigh down branches in late summer
  • Located in grid 13-6E and elsewhere throughout the Washington Park Arboretum

4)   Himalayan Stachyurus    (Stachyurus himilaicus)

  • Deciduous or semi-evergreen shrub to height of 10’
  • Displays clusters of flowers in early spring
  • Located in grid 25-1W

5)   Yunnan Stachyurus    (Stachyurus yunnanensis)

  • Small evergreen shrub to height of 6’
  • Chains of white flowers appear in spring
  • Located in grid 25-1W
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Orchids and Monkeys and Quetzals – OH MY!

July 28th, 2014 by Sarah Reichard

An Upcoming UW Botanic Gardens Adventure in Costa Rica

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Adventure awaits in Costa Rica with UW Botanic Gardens. Photo by Joanna Livingstone

One of the best things I did for myself during my graduate school days – no actually, in my whole life – was to take a two month tropical ecology class in Costa Rica from the Organization for Tropical Studies (OTS). Besides being in an incredibly beautiful place, I found myself in experiences that challenged me. Because I am a serious plant geek, I have always chosen projects relating to plants, but OTS would have none of that – we were assigned to work with various biologists and did projects relating to their specialties. Therefore, I spend a very memorable night trapping bats with a noted expert from the Smithsonian Museum, with a dawn serenade from howler monkeys all around us. I also worked on leaf cutter ants and poison dart frogs – and plants.

It was such a wonderful experience, that I felt no need to return to Costa Rica – until now. Holbrook Travel has organized a great trip that has many of the experiences I had with OTS, but a little safer. For instance, Holbrook can arrange for us to float in a raft on the Rio Sarapiqui. This river flows through the OTS La Selva station. Our field work was usually done in the morning and we would often run up the river a ways and then jump in the water fully clothed and float back to the field station to cool off before lunch. Between rocks and caimans we were probably flirting with more danger than we should, but we were in our 20s and had that live-forever mentality. I also spent a memorable evening with others in the class on Volcan Arenal, an active volcano, that resulted in our wandering in the dark as the volcano erupted, trying to find the bus that was coming to pick us up. Holbrook has placed us in the lovely Arenal Lodge, where we will be able to view the volcano and engage in a number of civilized activities.

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Photo by Dain Van Schoyck

We will also be visiting the high elevation Monteverde Reserve, where I am determined to see the Resplendent Quetzal! Despite many attempts to see this bird in Costa Rica and Guatemala, all involving me getting up in the wee hours of the morning, I have never seen it. In Guatemala I went to the place listed in all the guidebooks as the place you were guaranteed to see one. I heard them calling all around me (lovely call, by the way) but never saw one. To add further insult to injury, the woman who owned the property showed me a time-stamped photo taken the previous afternoon of three of these gorgeous birds sitting on a wire by her house! This time I will see one – I just KNOW it!

So come with me to Costa Rica! I can’t promise caimans and bats (and apparently not a Resplendent Quetzal), but I can promise fun and new experiences. We will very likely see all sorts of critters and certainly some amazing tropical rain forest plants. Oh and here is a tip – when we go out for a night walk to see nocturnal animals, bring a flashlight, but not a head lamp –a 6 inch moth banging into your head repeatedly is very distracting!

Download the itinerary for January 04, 2015 – January 13, 2015. Space is limited so register today!

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A Local Beauty

July 27th, 2014 by Catherine Nelson, Adult Tours Program Assistant

tplicatabranchesThis photo is of a native Thuja Plicata (common name; Western Red Cedar) and shows the great J-arm branches that these trees feature. Although the Puget Mill Company logged most trees on the site by 1900, this particular Thuja was perhaps overlooked by the loggers and is therefore one of the oldest and largest specimens in the arboretum. It is located between the Witt Winter Garden and Azalea Way.
This tree species was valued by the local Salish tribes who called it the “tree of life” as it provided them with bark for clothing, dried leaves for a medicinal tea, and planks for longhouses among many other uses.
Our August Free Weekend Walk’s topic is Native Plants & People; a knowledgeable guide will talk about this tree and various other native plants and their ethnobotanical uses.

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