May 19th, 2013 by Catherine Nelson, Adult Tours Program Assistant
Calycanthus x raulstonii ‘Hartlage Wine’
With the majority of our Rhododendron collection blooming right now, many other blossoming plants can be overshadowed – like this small shrub, the Calycanthus x raulstonii “Hartlage Wine’ which sits outside the Graham Visitors Center.
These gorgeous dark maroon flowers caught my eye the other day. The Calycanthus is a deciduous shrub that likes sun/part shade, can be a vigorous grower (though not taller than 8′), and bears long lasting flowers in the spring. The cultivar ‘Hartlage Wine’ is fairly new to gardens, it is a cross between a SE US species and a Chinese species. Although the 3″-4″ flowers last a long time, they do not bear the scent of their parent plants. The common name for these plants is Allspice, although they are not related to the pepper bearing Allspice which is the genus Pimenta. Free weekend walks for the month of May will feature many special flowers in our collection.
April 19th, 2013 by Catherine Nelson, Adult Tours Program Assistant
Our native Big Leaf Maples, Acer macrophyllum, are currently covered with dangling flowers. Right now is one of my favorite times to view these giant native trees because the effect of all these flowers in the trees is stunning. The flower clusters are about 4 inches long and 1 inch thick and because the tree has not foliated yet, they pop out like bright yellow/green ornaments.
To observe these flowers up close, you need to look for a low lying branch, not always easy to find on these huge trees. The Park’s Free Weekend Walks for April through May will feature these and more spring blooms.
March 24th, 2013 by Catherine Nelson, Adult Tours Program Assistant
The Red or Swamp Maple, Acer rubrum, is always noticed for its intense flame color in the fall, but I love these trees best right now – when they are covered in flowers prior to foliation.
From a distance the light gray bark of the tree sets off the pink & maroon flowers creating a stunning effect – it’s as if the tree is full of red fuzz. In order to see these gorgeous tiny flowers, you need to find a tree with low hanging branches and get up close; they are only about an 1-1 1/2″ long.
The Acer rubrum is native to North America, East of the Mississippi from the Southern US to Canada. The tree is monoecious and carries both male and female flowers, but bears them on separate branches. The flowers with a darker red color are identified as the females. It is a very popular street tree in Seattle, so keep your eyes open while traveling around the city right now, you can’t miss them.
February 4th, 2013 by Catherine Nelson, Adult Tours Program Assistant
There are several species of Witch Hazel, genus Hamamelis, featured in the Witt Winter Garden, which is in all its glory this month. The colors range from yellow to orange to red and their scent is incredibly heady.
The plant’s common name comes from the Old English word “Wych” which means “pliable”. The pliable branches of this plant were used for water dowsing, which was a way to find underground water, hence this activity also is known as ‘water witching”.
The Witch Hazel and many other winter blooming plants are featured on the Free Weekend Walks held each Sunday at 1:00 pm.
January 4th, 2013 by Catherine Nelson, Adult Tours Program Assistant
Japanese Umbrella Pine
The Washington Park Arboretum’s free Weekend Walk Program resumes in the new year. These 90 minute guided tours are free and open to the public every Sunday at 1:00 pm. No cost, no registration – just meet up at the Graham Visitors Center.
January’s tour is Ancient Trees; our guides will show and discuss tree species which have been around for millennia – such as the Japanese Umbrella Pine (see photo).
In February our walks will highlight the Witt Winter Garden in all its blossoming glory.
The March tour is Our Favorite Plants, during which your guide will share plants and garden areas that they enjoy the most.
For further information or questions you can email me at email@example.com. More Arboretum tour options.
November 6th, 2012 by Catherine Nelson, Adult Tours Program Assistant
The WPA guides and education staff recently visited Seattle’s Dunn Garden on one of our enrichment tours. We visit local gardens regularly as part of our commitment to further education so that we, as guides, can provide WPA visitors a great tour experience.
The Dunn Garden, like the arboretum, was designed by James Dawson of the Olmstead Brothers landscape design firm, While the WPA was designed in the 1930’s as a natural park to house the plant collection, the Dunn Garden is a private formal garden surrounding residences and predates our park by almost 30 years.
The two gardens have other connections. Ed Dunn, son of garden founder Arthur Dunn, served as the Arboretum Foundation president in the late 1950’s and was instrumental in the installation of the Japanese Garden. Many of the plants Ed Dunn installed in his garden were species he acquired through the WPA, purchased as extras by him when the arboretum would receive new collection plants.
Other similarities occur – I noticed that the Dunn, like the WPA, also featured some Douglas Firs with Hydrangea anomala vines growing up their trunks. I asked our docent if this was a Dawson design feature and was told that this was the influence of Elisabeth Miller, who was very involved the both gardens and founded the CUH’s Miller Library.
One of the most amazing features of the Dunn is the presence of many mature East Coast specimen trees like Sugar Maples, European Beech, and the largest Magnolia I have ever seen personally. The garden covers several acres separated in a variety of styles and is beautiful even in late autumn. I plan to return in the spring when flowers will be in their glory because I can only imagine how breathtaking it must be. The Dunn Garden is closed for the winter, but open again for tours in April, 2013. I highly recommend a visit . For more information their web site is www.dunngardens.org.
October 26th, 2012 by Catherine Nelson, Adult Tours Program Assistant
The Japanese maple collection in the arboretum boasts more than 90 different cultivars, many of which have been new plantings in the last few years. This makes our collection one of the largest in the United States. The Woodland Garden garden itself contains over 70 of these cultivars and the next couple of weeks is the time to see them in all their blazing glory. The tree pictured is Acer palmatum, cultivar Osakazuki which is at the NE pathway into the Woodland Garden. This photo does not do the vibrant red leaves justice, but this cultivar is considered to have the most intense crimson color of any of the maples. It is a hardy grower which does not get much above 8′ tall even in extreme old age and has been listed in catalogs since the mid-1800s.
The name Osakazuki is a reference to its leaves which cup at the base, the literal translation is “saki-cup-like leaf.”
Please join one of our free weekend walks over the next couple weeks and view the amazing fall colors. All tours meet at 1:00 pm, Sundays at the Graham Visitors Center.
October 13th, 2012 by Catherine Nelson, Adult Tours Program Assistant
I walked through the arboretum this week looking for early fall color in the park. This Fothergilla major always seems to be one of our first color transformations and its brilliant reds and oranges drew me to it as usual.
The Fothergilla major is a deciduous shrub native to the Southeastern U.S. where its common name is Witch Alder. Though not an alder, it is in the Hamamelidaceae family and, like its relative Witch Hazel, is a wonderful deciduous shrub for any garden.
Although the Japanese Maples are not quite turning as of this date, there is still great fall color to be seen in other trees like the Chestnut,Maples, Sumacs and others.
Our Free Weekend Walk topic from mid-October through at least mid-November will be on fall color. Come on a tour and let us show you the Park in its autumn glory. Join us on any Sunday at 1pm in front of the Graham Visitors Center.
September 9th, 2012 by Catherine Nelson, Adult Tours Program Assistant
These 3-parted pods contain the seeds of the Koelreuteria paniculata or Golden Rain Tree. This tree is native to East Asia, China & Korea and is used as an ornamental for its flowers, leaves and seed pods. Although it is considered an invasive in the SE United States. The Arboretum’s free Sunday walks for the month of September will feature the “Fruits & Nuts” of this tree and many others in the collection. Come on our free walk with a knowledgeable guide – every Sunday, 1:00 pm at the Graham Visitors Center