April Color Appears at the Washington Park Arboretum

April 6th, 2014 by UWBG Horticulturist
Selected cuttings from the Washington Park Arboretum (4/1/14-4/14/14)

Selected cuttings from the Washington Park Arboretum (4/1/14 – 4/14/14)

1)  Berberis x lologensis

  • A natural hybrid of B. darwinii and B. linearifolia originally found near Lake Lolog, Argentina in 1927
  • If you can get past the thorns, enjoy the rich, spicy fragrance.
  • Located in grid 14-6E near Arboretum Drive.

 

 

2)  Acer tegmentosum  ‘Joe Witt’

  • This striped-bark maple is named for former Arboretum Director Joseph Witt.
  • Located in the Witt Winter Garden and on Arboretum Drive in the Peonies.

3)  Magnolia salicifolia  ‘Else Frye’

  • Selected by Joe Witt for its larger flowers and named for the wife of T.C. Frye.
  • See Arboretum Bulletin Summer 1961, Summer 1962, and Winter 1962 for articles about this tree and the Fryes.
  • The original tree is in the Magnolia Collection, grid 26-2E.

4)  Magnolia x kewensis  ‘Wada’s Memory’

  • Part of a collection of plants purchased from Koichiro Wada in Japan in 1940.
  • Selected by Arboretum Director Brian Mulligan for its unusually large flowers.
  • The original tree is in grid 11-6E in the Hydrangeas.

5)  Quercus suber  (Cork Oak)”

Close-up photo of <em>Quercus suber</em>  (Cork Oak)

Close-up photo of Quercus suber (Cork Oak)

  • Evergreen oak native to southern Europe. A tree of incalculable social value, it produces the cork of
    commerce.
  • Located in the Rock Roses on Arboretum Drive.
  • This cutting includes the distinctive acorns – extremely rare in the Pacific Northwest.
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March Color Appears at the Washington Park Arboretum (Part II)

March 21st, 2014 by UWBG Horticulturist

“Seeing Red”

Selected cuttings from the Washington Park Arboretum (March 17 - 30, 2014)

Selected cuttings from the Washington Park Arboretum (March 17 – 30, 2014)

1)   Acer rubrum      (Red Maple)

  • Specific epithet, rubrum (red), refers to foliage in fall; however, flowers are red too
  • One of the earliest trees to flower, appearing in March, well before the leaves
  • Located at south end of Arboretum Drive East, against the Broadmoor fence
Close-up photo of the Acer rubrum (Red Maple) flowers

Close-up photo of the Acer rubrum (Red Maple) flowers

 

 

 

 

 

 

 

 
 
 
2)   Camellia japonica      ‘Jupiter’

  • Carmine-red flowers with prominent yellow stamens on white filaments
  • Located along Ridgetop Trail at head of Rhododendron Glen

3)   Chaenomeles sp.      (Flowering Quince)

  • Old-fashioned, early spring flowering shrub
  • OK, so this specimen is not the reddest available, but the best I could find.
  • Located behind the Stone Cottage along the public path

4)   Grevillea victoriae      (Mountain Grevillea)

  • This proteaceous plant’s foliage was the feature cutting for the first half of March 2014; now it’s the red flowers.
  • Located in the Pacific Connections – Australia Entry Garden

5)   Rhododendron strigillosum

  • Early maroon-red flowering rhododendron
  • Twigs and leaf stalks on young growth covered with long bristles
  • Specimens located in the Witt Winter Garden, Woodland Garden and Sino-Himalayan Hillside
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March Color Appears at the Washington Park Arboretum

March 9th, 2014 by Pat Chinn-Sloan
Selected cuttings from the Washington Park Arboretum (March 3 - 16, 2014)

Selected cuttings from the Washington Park Arboretum (March 3 – 16, 2014)

1)   Berberis fortunei      (Chinese Mahonia)

  • Previously categorized in the genus, Mahonia
  • Characterized by narrow, serrated evergreen leaves
  • Located in the Sino-Himalayan hillside

2)   Grevillea victoriae      (Mountain Grevillea)

  • Australian shrub, growing up to four meters
  • Named for Queen Victoria
  • Located in the Pacific Connections – Australia Entry Garden

3)   Lomatia myricoides      (River Lomatia)

  • Originally placed in the genus, Embothrium
  • Specific epithet refers to foliage similar to the genus, Myrica
  • Located near the Pacific Connections – New Zealand Forest

4)   Morella californica      (California Bayberry)

  • Formerly of the genus, Myrica
  • A Pacific Coast native shrub that is well suited for borders and hedges
  • Located in the Pacific Connections – Cascadia Entry Garden

5)   Podocarpus macrophyllus      (Kusamaki)

  • Japanese conifer, sometimes referred to as Buddhist Pine
  • Known by carpenters for termite resistant wood
  • Located near the junction of the Middle Trail and Lower Trail
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February Color Appears at the Washington Park Arboretum (Part II)

February 23rd, 2014 by Pat Chinn-Sloan


“Spring Buds”


Selected cuttings from the Washington Park Arboretum (February 17 - March 2, 2014)

Selected cuttings from the Washington Park Arboretum             (February 17 – March 2, 2014)


1)   Acer monspessulanum var. turcomanicum
Montpelier maple

  • An elegant, compact tree reaching 23-33 feet tall.
  • Suitable for warm climates and adapted to calcareous and stony soils.
  • A mature individual is growing in the Mediterranean bed along Arboretum Drive.

2)   Magnolia kobus                Kobushi Magnolia

  • Blooms in early spring and bears pleasantly fragrant white flowers.
  • Native to Japan and cultivated in temperate climates.
  • A lovely, large specimen sits in the Arboretum Magnolia Collection.

3)   Rhodondendron ‘Directeur Moerlands’
Azalea ‘Directeur Moerlands’

  • Derived from crosses between Japanese azaleas and Chinese azaleas.
  • Known for their excellent fall color and unsurpassed springs flowers.
  • Azalea Way is loaded with beautiful azaleas just ready to explode for spring.

4)   Ribes sanguineum ‘Henry Henneman’           Henry Henneman Winter Currant

  • Studded with a cap-burst of color at a botanically bereft time of year.
  • Easy to grow, well-mannered and amenable to pruning.
  • The Cascadian Entry Garden boast several cultivars of this wonderful, early blooming shrub.

5)   Sambucus racemosa              Red Elderberry

  • Grows in riparian environments, woodlands and in generally moist areas.
  • Many parts of the plant are poisonous and have been used as an emetic.
  • Native to the Pacific Northwest, elderberry bushes dot the Arboretum. Birds love the seeds.
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February Color Appears at the Washington Park Arboretum

February 6th, 2014 by Pat Chinn-Sloan
Selected cuttings from the Washington Park Arboretum (February 3 - 16, 2014)

Selected cuttings from the Washington Park Arboretum             (February 3 – 16, 2014)

1) Chimonanthus praecox  Wintersweet

  • With exceedingly fragrant yellow flowers borne on the bare shoots in winter, C. praecox has a suitable home here within the Witt Winter Garden.
  • Chimonanthus is the Chinese counterpart of the North American genus, Calycanthus.

2)  Lonicera standishii Winter Honeysuckle

  • A native of China, L. standishii is a perennial favorite because of its charming fragrance.
  • This specimen can be found in the Witt Winter Garden.

3)  Pieris japonica ‘Valentine’s Day’

  • Known commonly as ‘Lily of the Valley’, P. japonica is an evergreen shrub of low habit. The clustered panicles of this particular cultivar are a dark, dusky red color, giving it plenty of mid-winter attraction.
  • Located near the south end of the Lilac Collection along Azalea Way.

4)  Prunus x subhirtella ‘Rosea’

  • Native to Japan, this relatively small flowering cherry has begun to show us its rose-pink blossoms.
  • Several specimens can be found throughout the Arboretum, including one along the trail that leads from here to the Winter Garden.

5)  Viburnum specimens

  • V. farreri ‘Candidissimum’
  • V. foetens
  • V. x bodnantense ‘Deben’
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January Color Appears at the Washington Park Arboretum

January 13th, 2014 by Pat Chinn-Sloan
Selected cuttings from the Witt Winter Garden at the Washington Park Arboretum (January 6 - 19, 2014)

Selected cuttings from the Witt Winter Garden at the Washington Park Arboretum (January 6 – 19, 2014)

Witt Winter Garden

1)  Calluna vulgaris ‘Robert Chapman’            Heather, Ling

  • This monotypic genus is native from northwestern Europe, through Siberia and Turkey, all the way to Morocco and the Azores.
  • The species has over 500 cultivars – some noted for spectacular flower displays in summer, while others display fantastic foliage coloration in winter.
  • C.v. ‘Robert Chapman’ has golden foliage throughout summer, which turns red in winter and spring.

2)  Cornus sanguinea ‘Midwinter Fire’           Bloodtwig Dogwood

  • In winter, the yellow stems of this twiggy shrub brighten to a stunning display of reds and oranges, depending on sun exposure.

3)  Danae racemosa           Alexandrian, Poet’s Laurel

  • This native of Iran and Turkey has no true leaves, only leaf-like modified stem tissue called phylloclades.
  • Tiny, yellow flowers that grow directly on the stem produce dramatic red fruits in winter.
  • Poet’s Laurel was used by the Romans and Greeks to crown exemplary athletes, orators and poets.

4)  Garrya x issaquahensis ‘Carl English’           Silk Tassel

  • A hybrid of G. elliptica and G. fremontii, this Garrya bears purple-tinged silvery flower tassels in winter.
  • Both parents are native to the west coast of the United States.

5)  Hamamelis mollis           Witch Hazel

  • This Chinese witch hazel has large, very fragrant, golden-yellow flowers in early winter.
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Medicinal woody plants growing in the Washington Park Arboretum

December 30th, 2013 by Kathleen DeMaria, Arboretum Gardener
photo

Bark from the Pacific Yew, Taxus brevifolia

1) Taxus brevifolia (Pacific or Western Yew)

  • Native from southern Alaska to central California
  • Chemotherapy drug Taxol was derived from the bark
  • All parts of the plant are toxic except the fleshy red aril surrounding the little green cones

2) Salix (Willows)

  • Aspirin is derived from Salicylic acid (component of Willow-bark extract)
  • Medicinal use dates back to at least the 5th century BC when the Greek physician Hippocrates prescribed it to ease pain and reduce fevers.
  • Lewis and Clark used willow bark tea as a remedy for crew fevers

3) Hamamelis virginiana (Witch Hazel)       

  • Leaves and bark contain hamamelitannin believed to be responsible for astringent properties, hemostatic properties, and antioxidant activity
  • North American Indians distilled bark, leaves and twigs to make eyewash, treatment for hemorrhoids, internal hemorrhages, and gum inflammation.

photo4) Ginkgo biloba (Maidenhair tree)

  • Considered a living fossil, Ginkgo  is native to China
  • Chinese people appreciate the dry-roasted nuts as a treatment for lung qi deficiency

5) Thuja occidentalis (Eastern arborvitae)

  • One of the four plants of the Ojibwe medicine wheel
  •  Rich in vitamin C, thought to have cured many bouts of scurvy in mariners

Source: Moerman, Native American Ethnobotany; Van Wyk and Wink, Medicinal Plants of the World; Schafer, The Chinese Medicinal Herb Farm

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

December 16th, 2013 by Pat Chinn-Sloan
Selected cuttings from the Washington Park Arboretum (December 9 - 23, 2013)

Selected cuttings from the Washington Park Arboretum (December 9 – 23, 2013)

1)   Abies balsamea   (Balsam fir)

  • Pitch from almost every conifer is used to seal and protect wood.
  • “Canada Balsam” from the Balsam Fir is used to cement together the lens elements in optical equipment and to mount specimens for microscopy.
  • It is North America’s most popular Christmas tree, but only newly planted in the Arboretum in grid 42-4W.
  • Native to eastern North America

2)   Cedrus libani   (Cedar of Lebanon)

  • “Cedar oil” is distilled from several conifers, mostly not Cedrus, the “true cedar”.
  • Cedar oil has insecticidal properties, was used in ancient embalming, and is currently used as immersion oil in microscopy and to mask surface flaws in emeralds.
  • Several of our true cedars – Cedar of Lebanon, Atlas Cedar, and Deodar Cedar are located along the Lynn Street entrance, west of the Wilcox foot bridge.

3)   Picea sitchensis   (Sitka spruce)

  • Before the introduction of chicle, North Americans (both natives and immigrants) chewed spruce gum.
  • Spruce roots are used for stitching bark canoes and weaving hats and baskets.
  • The famous “Spruce Goose” was not spruce but acquired its alliterative sobriquet because early airplane builders valued spruce’s high strength-to-weight ratio.
  • Our best Sitka spruce is in 15-B on Azalea Way.

4)   Pinus monticola   (Western white pine)

  • The Lower Kootenay Band of the Ktunaxa Nation made bark canoes from white pine bark.   See the website: sturgeon-nose-creations.com
  • Industrially, pine extracts make pine tar, turpentine, pitch, and rosin for violin bows, ballet shoes, baseball bats, and soldering flux.
  • Pinus monticola is in the Pinetum in grid 35-6W.

5)   Quercus suber   (Cork oak)

  • Quercus = oak, suber = cork. Location: Rock Roses on Arboretum Drive.
  • Any questions?
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December Color Appears at the Washington Park Arboretum

December 1st, 2013 by Pat Chinn-Sloan
Selected cuttings from the Washington Park Arboretum (November 26, 2013 - December 9, 2013)

Selected cuttings from the Washington Park Arboretum (November 26, 2013 – December 9, 2013)

“Berry Best from Hollywood”

1)   Ilex aquifolium   ‘Ferox Argentea’   (Variegated Porcupine Holly)

  • This “Punk” star is a sterile male with spiny leaves, but obviously no berries.
  • But this means it doesn’t contribute to English holly’s invasiveness in the Pacific Northwest.
  • Old cultivar in England, first reported in 1662 (Galle).
  • Specimen is located in the Eurasian clade (family), W. berm, of the Ilex Collection.

2)   Ilex maximowicziana var. kanehirae

  • This “Mod” diva has a tidy upright form with black berries.
  • Native to China and Japan
  • Has gone through many name changes, intermediate between I. crenata and I. triflora.
  • Specimen is located in the Asian/North American clade of the Ilex Collection.

3)   Ilex opaca  ‘Boyce Thompson Xanthocarpa’

  • An American holly celebrity which dares to be different, sporting yellow berries.
  • Reported to have been discovered in the wild, Mount Vernon, VA, late 1920’s.
  • Specimen located in the American clade, S. berm, of the Ilex Collection.

4)   Ilex verticillata  ‘Winter Red’     (Winterberry cultivar)

  • You don‘t always need to be dressed in leaves, says this scarlet actress.
  • Reliable shrub with heavy, bright red fruit set and good berry retention.
  • A nice thicket is found along Azalea Way, just north of Lookout Pond.

5)   Ilex x  ‘Nellie R. Stevens’

  • This mischievous leading lady has been nothing but trouble!
  • Claiming English holly parentage, but also Chinese holly parentage. In any case, no denying she certainly resembles English holly in my book.
  • Specimen is located in the Eurasian clade, N. berm, in the Ilex Collection.
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November Color Appears at the Washington Park Arboretum (Part II)

November 18th, 2013 by Pat Chinn-Sloan
Selected cuttings from the Washington Park Arboretum (November 12 - 25, 2013)

Selected cuttings from the Washington Park Arboretum (November 12 – 25, 2013)

Got Greens?

1)   Fokienia hodginsii     (Fokienia)

  • Native to China, Vietnam, and Laos
  • Extremely slow growing outside of native range
  • Specimen located in Rhododendron Glen

2)   Keteleeria evelyniana     (Keteleeria)

  • Native to China, Vietnam, and Laos
  • Thrives in warm climates, but may be considered an “herbaceous perennial” in northern climates
  • Specimen located in north Pinetum area

3)   Taiwania cryptomerioides     (Coffin Tree)

  • Native to Taiwan, China, and Vietnam
  • Considered “critically threatened” in native range
  • Specimen located near East Newton Street entrance to the Pinetum area

4)   Thujopsis dolabrata     (Lizard Tree)

  • Native to Japan
  • Thrives in moist, shady areas with rich soil
  • Specimen located among Acer Collection in the Woodland Garden

5)   Torreya taxifolia     (Stinking Cedar)

  • Native to southeastern U.S. (Florida)
  • Very rare in native range due to a fungal pathogen
  • Specimen located between Loderi Valley and the Woodland Garden
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