Spring Arrives at the Washington Park Arboretum

Selected cuttings from the Washington Park Arboretum , March 13 - 20, 2017

1)   Cornus mas                     Cornelian Cherry A native of Europe, C. mas has been cultivated for centuries in Britain. Flowers are produced in February and March on the leafless stems in short-stalked umbels from the joints of the previous year’s wood. Oblong-ellipsoid, fleshy, bright red fruit are produced in late summer, and are edible when ripe. Found throughout the Arboretum, these shrubs or small trees are easily identified at this time. 

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Selected Cuttings from the Joseph A. Witt Winter Garden (Part II)

Selected cuttings from the Joseph Witt Winter Garden, February 13 - 26, 2017

1)  Corylopsis glabrescens                                    Winter Hazel This native of Korea and Japan teases us with flower buds that seem to be just on the edge of opening – for weeks! The Joseph Witt Winter Garden contains multiple species of Corylopsis so that people may compare and appreciate the subtle differences in form and flower color the genus Corylopsis offers. 2)  Pieris japonica                                                          Lily of the Valley Shrub The spring flowers and often the new growth of Pieris can be quite showy, but the buds themselves decorate our gardens throughout the winter months. 

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Selected Cuttings from the Joseph A. Witt Winter Garden

Selected cuttings from the Washington Park Arboretum, January 30, 2017 - February 12, 2017

The Witt Winter Garden was originally designed and planted in 1949. In the late 1980s the garden was named after Joseph A. Witt, an Arboretum curator who had a special interest in winter ornamental plants. Here is a small sampling of plants to be enjoyed now in the Winter Garden. Download a map and plant list at: https://botanicgardens.uw.edu/washington-park-arboretum/gardens/joseph-a-witt-winter-garden/ 1)   Chimonanthus praecox                (Wintersweet) The 15’ tall arching stems host beautiful and aromatic creamy, yellowish flowers. 

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The New Zealand Dead Look

Selected cuttings from the Washington Park Arboretum, January 17 - 31, 2017

New Zealand has a large number of shrubs with small tough leaves and wiry interlacing branches – divaricates. Some even have brown or grey new growth, giving a dead-like appearance. It is suggested that this may be a defensive mechanism to deter browsing moa (extinct flightless birds). 1)  Coprosma propinqua                (Mingimingi) A visiting New Zealand scholar once described Coprosma as “a genus without morals that hybridizes incessantly” as she was politely telling us she didn’t think we were actually growing true Coprosma propinqua. 

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Cold? No Problem

Selected cuttings from the Washington Park Arboretum, (January 3 - 16, 2017)

The following conifers are among the cold-hardiest on earth! 1)   Abies balsamea                (Balsam Fir) USDA Hardiness Zone 3: -40° to -30°F. North American fir with range distribution as far north as Labrador, Canada. Balsam fir is the most cold-hardy and aromatic of all firs. 2)   Juniperus communis                (Common Juniper) USDA Hardiness Zone 2: -50° to -40°F. The most widespread tree or shrub in the world! 

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Happy Holidays from the Washington Park Arboretum!

Selected cuttings from the Washington Park Arboretum (12/20/16 - 1/3/17)

1)   Calocedrus decurrens                Incense Cedar This native of Oregon and south to Baja California was first described by Colonel John C. Fremont in 1846. Incense cedar is often confused with Western Red Cedar (Thuja plicata), but is distinguished by its branchlets being held vertically, its narrow pyramidal habit, and by the lack of white stomata on the leaf undersides. Located north of the Wilcox Bridge (marked by a sign) and east of the Pinetum Loop Trail. 

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Fine (Evergreen) Foliage of Fall

Selected cuttings from the Washington Park Arboretum (October 31, 2016 - November 13, 2016)

1)   Arbutus unedo                    Strawberry Tree Autumn brings bright white bell flowers and deep red-orange fruit, both of which are set off by the deep-green, leathery leaves. Hidden under the foliage are attractive stems with shredding red-brown bark. 2)   Berberis (Mahonia) fortunei              Chinese Mahonia Many evergreen Mahonias have excellent textural foliage, from large and bold to low and delicate. Berberis fortunei can be found growing low to the ground on our Sino-Himalayan hillside. 

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Selected Mid-Autumn Cuttings from the Washington Park Arboretum

Selected cuttings from the Washington Park Arboretum, October 17 - 30, 2016

1)   Araucaria araucana                Monkey Puzzle Native to Chile and Argentina in the south central Andes mountains. This long-lived tree is frequently described as a living fossil. Large cones yield many edible nuts, similar to a pine nut. 2)   Berberis gagnepainii                                 Gagnepain’s Barberry This evergreen shrub is native to China in the Sichuan and Yunnan Provinces. Shrub is protected by many slender three-spined thorns. 

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Autumn Color Arrives at the Washington Park Arboretum

Selected cuttings from the Washington Park Arboretum (October 3 - 16, 2016)

1)  Sorbus alnifolia                                               (Korean Mountain Ash) Native to central China, Korea and Japan this medium-sized tree boasts showy 2-3 inch umbrella-shaped clusters of 5-petal white flowers in late spring. As summer yields to autumn, clusters of purple-red to orange-red ½ inch showy fruits appear and persist into winter. 2)  Gaultheria mucronata                                      (Prickly Heath) Formerly known as Pernettya, this southern Chilean native spends the fall awash with showy globose berries in shades from deep plum to pink to white. 

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