AS ADOPTED BY THE PARKS, RECREATION AND CULTURAL SERVICES BOARD ON DECEMBER 6, 2018

APPENDIX G – RIGHT-OF-WAY STREET TREE LIST

APPENDIX G – RIGHT-OF-WAY STREET TREE LIST 1

Large Columnar Trees

Scientific & Common Mature Spread Under Min Strip Flower Fall Comments Name Height (ft) Wires/View Width (ft) Color Color (ft) Covenants

Acer nigrum ‘Green 50 10 No 6 N/A Good close to Column’ buildings Green Column Black Sugar Maple Ginko biloba ‘Princeton 40 15 No 6 N/A Very narrow growth. Sentry’ Princeton Sentry Ginkgo Nyssa sylvatica 60 20 No 6 N/A Handsome chunky Tupelo bark – Great Plant Pick Quercus ‘Crimschmidt’ 45 15 No 6 N/A Hard to find in the Crimson Spire Oak nursery trade Quercus frainetto 50 30 No 6 N/A Drought resistant – Italian Oak beautiful green, glossy leaves in summer. Great Plant Pick Quercus robur 40 15 No 6 N/A Columnar variety of ‘fastigiata’ oak Skyrocket Oak Taxodium distichum 55 20 No 6 N/A Deciduous conifer - 'Mickelson' Shawnee tolerates city Brave Bald Cypress conditions

Large Trees

Scientific & Common Mature Spread Under Min Flower Fall Comments Name Height (ft) Wires/View Strip Color Color (ft) Covenants Width (ft) Acer saccharum Fastest growing sugar ‘Bonfire’ 50 40 No 6 N/A maple Bonfire Sugar Maple Acer saccharum Resistant to leaf tatter. 'Commemoration' Great Plant Pick 50 35 No 6 N/A Commemoration Sugar Maple Acer saccharum 'Green Reliable fall color. Mountain' Green 45 35 No 6 N/A Great Plant Pick Mountain Sugar Maple Acer saccharum Limited use - where 'Legacy' sugar maple is desired 50 35 No 5 N/A Legacy Sugar Maple in limited planting strip area. Great Plant Pick Aesculus flava Least susceptible to leaf 60 40 No 6 Yellow Buckeye blotch – large fruit – fall

APPENDIX G – RIGHT-OF-WAY STREET TREE LIST 2

Scientific & Common Mature Spread Under Min Flower Fall Comments Name Height (ft) Wires/View Strip Color Color (ft) Covenants Width (ft)

color is varied, but quite beautiful

Cercidiphyllum Needs lots of water japonicum when young – can 40 40 No 6 N/A Katsura Tree produce large surface roots. Great Plant Pick

Fagus sylvatica Silvery-grey bark 50 40 No 6 N/A Green Beech

Fagus sylvatica Beautiful cut leaf. Great 'Asplenifolia' 60 50 No 6 N/A Plant Pick

Fernleaf Beech

Ginkgo biloba 'Magyar' more upright and Magyar Ginkgo 50 25 No 6 N/A narrow than 'Autumn

Gold’

Gymnocladus dioicus Very coarse branches - 'Espresso' extremely large bi- 50 35 No 6 N/A Espresso Kentucky pinnately compound Coffee leaves

Liriodendron tulipifera Fast-growing tree – can Tulip Tree 60 30 No 8 N/A get very large in open

conditions

Metasequoia Fast growing deciduous glyptostroboides 50 25 No 6 N/A conifer. Great Plant

Dawn Redwood Pick

Quercus bicolor Interesting shaggy 60 45 No 8 N/A Swamp White Oak peeling bark

Quercus coccinea Best oak for fall color 60 40 No 6 N/A Scarlet Oak

Quercus garryana Native to Pacific 50 40 No 8 N/A Oregon Oak Northwest. Great Plant Pick

APPENDIX G – RIGHT-OF-WAY STREET TREE LIST 3

Scientific & Common Mature Spread Under Min Flower Fall Comments Name Height (ft) Wires/View Strip Color Color (ft) Covenants Width (ft)

Quercus imbricaria Nice summer foliage - Shingle Oak 60 50 No 6 N/A leaves can persist

throughout the winter

Quercus muhlenbergii coarsely toothed leaf 60 50 No 6 N/A Chestnut Oak

Quercus robur Large, sturdy tree. English Oak Acorns do not need 60 40 No 8 N/A dormant cold period to

germinate, so can be invasive.

Quercus rubra Fast growing oak – Red Oak 60 45 No 8 N/A large tree that needs

space

Quercus velutina More drought tolerant 60 50 No 8 N/A Black Oak than red oak

Taxodium distichum A deciduous conifer, Bald Cypress broadly spreading when 55 35 No 8 N/A mature – columnar

when young. Great Plant Pick Ulmus ‘Homestead’ Complex hybrid - close Homestead Elm in form to American elm 60 35 No 6 N/A - Resistant to Dutch elm disease Ulmus ‘Frontier’ Resistant to Dutch elm 50 35 No 6 N/A Frontier Elm disease Zelkova serrata Attractive exfoliating ‘Greenvase’ bark provides Winter Green Vase Zelkova appeal. Dark green 45 40 No 6 N/A leaves turn orange-red and purple in Fall. Great Plant Pick Zelkova serrata ‘Village Green Vase, Green’ Mussichino and Halka 40 40 No 6 N/A Village Green Zelkova are improved forms. Great Plant Pick

APPENDIX G – RIGHT-OF-WAY STREET TREE LIST 4

Medium / Large Trees

Scientific & Common Mature Spread Under Min Flower Fall Comments Name Height (ft) Wires/View Strip Color Color (ft) Covenants Width (ft) Acer campestre Contrary to its name, this Hedge Maple is not a small tree – nice 50 30 No 5 N/A overall shape and structure Acer campestre More upright branching ‘Evelyn’ than the species. 40 30 No 5 N/A Queen Elizabeth Hedge Maple Acer freemanii Cross between red and 'Autumn Blaze' silver maple – fast 50 40 No 6 N/A Autumn Blaze Maple growing with good fall color Acer miyabei 'Morton' Similar to, but faster State Street Maple 40 30 No 6 N/A growing and larger than Hedge maple Acer pseudoplatanus Leaves green on top ‘Atropurpureum’ 40 30 No 5 N/A purple underneath. Spaethii Maple Aesculus x carnea Resists heat and drought ‘Briottii’ 30 35 No 6 better than other Red Horsechestnut horsechestnuts Betula jacquemontii White bark makes for Jacquemontii Birch good winter interest – 40 30 No 5 N/A best for aphid resistance, but does have issues with Bronze Birch Borer Ginko biloba ‘Autumn Narrow when young Gold’ 45 35 No 6 N/A Autumn Gold Ginkgo Nothofagus antarctica Rugged twisted Antarctic Beech branching and petite 50 35 No 5 N/A foliage – difficult to find in the nursery trade Tilia americana Pyramidal, needs extra ‘Redmond’ 50 30 No 8 N/A water when young Redmond Linden Tilia cordata Symmetrical, pyramidal ‘Greenspire’ form – sometimes has Greenspire Linden 40 30 No 6 N/A structural issues due to tight branch attachements Ulmus parvifolia ‘Emer Exfoliating bark and nice II’ 45 35 No 5 N/A fall color – Resistant to Allee Elm Dutch Elm Disease

APPENDIX G – RIGHT-OF-WAY STREET TREE LIST 5

Medium Columnar Trees

Scientific & Common Mature Spread Under Min Strip Flower Fall Comments Name Height (ft) Wires/View Width Color Color (ft) Covenants (ft) Carpinus betulus Broadens when older. ‘Fastigiata’ Great Plant Pick 40 15 No 5 N/A Pyramidal European Hornbeam Fagus sylvatica Purple foliage. ‘Dawyck Purple’ 40 12 No 6 N/A Dawyck Purple Beech Liriodendron tulipifera Good next to buildings – 'Fastigiatum' can have problems with 40 10 No 6 Columnar Tulip Tree tight branch angles. Great Plant Pick Malus ‘Tschonoskii’ Sparse green fruit, Tschonoskii 30 15 Yes 5 pyramidal Crabapple Oxydendron arboreum Consistent and brilliant Sourwood 35 12 No 5 fall color. Great Plant Pick Pyrus calleryana Narrow tree with better ‘Cambridge'’ branch angles and form Cambridge Pear 40 15 No 5 than the species – brittle limbs may be a problem with ice or wet snow

Medium Trees

Scientific & Common Mature Spread Under Min Strip Flower Fall Comments Name Height (ft) Wires/View Width Color Color (ft) Covenants (ft) Acer grandidentatum Intense red fall color - ‘Schmidt’ Limited availability in 25 20 Yes 5 N/A Rocky Mt. Glow nursery trade Maple Acer truncatum x A. Reliable fall color - nice platanoides reddish orange ‘Keithsform 35 25 No 5 N/A Norwegian Sunset Maple Acer truncatum x A. Limited use under platanoides higher wires 30 25 Yes 5 N/A 'Warrensred‘ Pacific Sunset Maple Betula albosinenesis White and pink peeling var septentrionalis 40 35 No 5 N/A bark. Great Plant Pick Chinese Red Birch Carpinus caroliniana Outstanding fall color American Hornbeam (variable – yellow, 25 20 Yes 5 N/A orange, red) – nice little tree. Great Plant Pick

APPENDIX G – RIGHT-OF-WAY STREET TREE LIST 6

Scientific & Common Mature Spread Under Min Strip Flower Fall Comments Name Height (ft) Wires/View Width Color Color (ft) Covenants (ft) Cladrastis kentukea White flowers in spring, Yellowwood resembling wisteria flower – blooms 40 40 No 5 profusely only every 2 to 4 years – yellow/gold fall color Cornus controversa Frothy, 6-inch clusters 'June Snow' 40 30 No 5 of white flowers in June Giant Dogwood – Great Plant Pick Crataegus crus-galli Red persistent fruit ‘Inermis’ 25 30 Yes 5 Thornless Cockspur Hawthorne Cornus 'Eddie's White A hybrid of C. florida Wonder' and C. nuttalii 30 20 Yes 5 Eddie's White Wonder Dogwood Crataegus x lavalii Thorns on younger 25 20 Yes 5 Lavalle Hawthorne trees. Great Plant Pick Davidia involucrata Large, unique flowers in 40 30 No 5 N/A Dove Tree May. Great Plant Pick Eucommia ulmoides Dark green, very shiny Hardy Rubber Tree 50 40 No 6 N/A N/A leaves – insignificant fall color Fagus sylvatica Attractive purple leaves 'Rohanii' with wavy margins. 50 30 No 6 N/A N/A Purple Oak Leaf Great Plant Pick Beech Halesia monticola Attractive small white 45 25 No 5 Mountain Silverbell flower Halesia tetraptera Attractive bark for 35 30 No 5 Carolina Silverbell seasonal interest Koelreuteria Midsummer blooming – paniculata 30 30 Yes 5 slow growing. Great Goldenrain Tree Plant Pick Magnolia denudata 6” inch fragrant white Yulan Magnolia 40 40 No 5 N/A flowers in spring. Great Plant Pick Magnolia grandiflora Evergreen magnolia – ‘Victoria’ can be damaged in 25 20 Yes 5 N/A Victoria Evergreen years with wet, heavy Magnolia snow. Great Plant Pick Magnolia kobus Does not flower well ‘Wada's Memory’ when young. Great 30 20 Yes 5 Wada's Memory Plant Pick Magnolia’ Ostrya virginiana Hop like fruit – slow 40 25 No 5 N/A Ironwood growing

APPENDIX G – RIGHT-OF-WAY STREET TREE LIST 7

Scientific & Common Mature Spread Under Min Strip Flower Fall Comments Name Height (ft) Wires/View Width Color Color (ft) Covenants (ft) Phellodendron This variety is fruitless – amurense 'Macho' 40 40 No 5 N/A fall color can be varied. Macho Cork Tree High drought tolerance Prunus cerasifera Burgundy colored ‘Krauter Vesuvius’ leaves – tree best used 30 20 Yes 5 N/A Vesuvius Flowering as an accent rather Plum than in mass plantings Pterostyrax hispida Pendulous creamy Fragrant Epaulette white flowers – fragrant 40 30 No 5 Tree – difficult to find in the nursery trade Quercus Ilex Evergreen oak - Holly Oak Underside of leaf is 40 30 No 5 N/A N/A silvery-white. Often has a prominent umbrella form Rhamnus purshiana Native tree – fall color Cascara depends on exposure – 30 20 Yes 5 N/A purplish fruit feeds many native birds Robinia x ambigua Fragrant flowers. Pink Idaho Locust Sterile variety. Drought 35 25 No 5 tolerant. Some varieties will sucker profusely. Sorbus x hybridia It has leaves which are Oakleaf Royal Mt. similar to English oak, 30 20 Yes 5 Ash and interesting bark for seasonal features. Styrax japonica Reliable and easy to Japanese Snowbell grow, it has plentiful, green ½” inch seeds. 25 25 Yes 5 Flowers similar to lily in the valley. Great Plant Pick Tilia cordata ‘De One of the smaller Groot’ stature littleleaf lindens. 30 20 Yes 5 N/A De Groot Littleleaf Linden Tilia cordata Pyramidal when young. ‘Chancole’ 35 20 No 6 N/A Fragrant flowers that Chancelor Linden attract bees. Ulmus parvifolia High resistance to 'Emer I' Dutch Elm Disease. Athena Classic Elm Drought resistant. 30 35 No 5 N/A Cinnamon colored exfoliating bark for seasonal interest.

APPENDIX G – RIGHT-OF-WAY STREET TREE LIST 8

Small Columnar Trees

Scientific & Common Mature Spread Under Min Strip Flower Fall Comments Name Height (ft) Wires/View Width Color Color (ft) Covenants (ft)

Maackia amurensis 30 20 Yes 5 N/A Interesting exfoliating Amur Maackia bark – flowering in June or July - varies in intensity from year to year Malus ‘Adirondack’ 20 10 Yes 5 Very resistant to apple Adirondack scab – one of the Crabapple narrowest crabapples – persistant reddish ¼” fruit. Great Plant Pick Malus ‘Red Barron’ 20 10 Yes 5 Deep pink blossom and Red Barron persistent red berries Crabapple for seasonal interest Prunus serrulata 20 8 Yes 6 Pinkish flower bud, ‘Amanogawa’ changing to white Amanogawa flower. Flowering Cherry Sorbus americana 20 10 Yes 5 Nice winter form - Red ‘Dwarfcrown’ berries persistent in Red Cascade clusters Mountain Ash

Small Trees

Scientific & Common Mature Spread Under Min Strip Flower Fall Comments Name Height (ft) Wires/View Width (ft) Color Color (ft) Covenants Acer buegerianum Somewhat shrub-like – Trident Maple must train to a single 30 30 Yes 5 N/A stem – interesting bark. Great Plant Pick Acer circinatum Native tree. Avoid using Vine Maple 25 25 Yes 5 N/A on harsh sites. Great Plant Pick Acer ginnala ‘Flame’ Clusters of small cream Flame Amur Maple colored flowers in spring 25 20 Yes 5 – very fragrant. Nice fall color. Informal branch structure. Acer griseum Peeling cinnamon Paperbark Maple colored bark for 30 20 Yes 5 N/A seasonal interest. Great Plant Pick Acer palmatum Many varieties available Japanese Maple 20 25 Yes 5 N/A – select larger varieties for street planting Acer triflorum Multi seasonal interest 25 20 Yes 5 N/A Three-Flower Maple with tan, exfoliating bark

APPENDIX G – RIGHT-OF-WAY STREET TREE LIST 9

Scientific & Common Mature Spread Under Min Strip Flower Fall Comments Name Height (ft) Wires/View Width (ft) Color Color (ft) Covenants and red, orange/red fall color. Great Plant Pick Amelanchier Good for narrower grandiflora ‘Princess planting strips Diana’ 20 15 Yes 4 Princess Diana Serviceberry Amelanchier x Good for narrower grandiflora ‘Autumn planting strips – reliable Brilliance 20 15 Yes 4 bloom and fall color Autumn Brilliance Serviceberry Arbutus unedo Substitute for Pacific ‘Marina’ madrone – can suffer Strawberry Tree 25 20 Yes 5 N/A severe damage or death due to cold weather - evergreen Carpinus japonica Wide spreading, slow Japanese Hornbeam growing – fall color is not 20 25 Yes 5 N/A outstanding. Great Plant Pick Cercis canadensis Deep pink flowers on 25 30 Yes 5 Eastern Redbud bare twigs in spring Cercis siliquastrum Deep pink flowers on Judas Tree 25 30 Yes 5 bare twigs in spring – drought resistant Cornus alternifolia Small white flowers in Pagoda Dogwood 25 25 Yes 5 flat clusters – fall color is varied. Great Plant Pick Cornus kousa Does not do well on ‘Chinensis’ 20 20 Yes 4 harsh, dry sites. Great Kousa Dogwood Plant Pick Cotinus obovatus Showy pinkish panicles American Smoke of flowers in the spring – Tree 25 25 Yes 4 reddish purple leaves on some varieties. Great Plant Pick Lagerstroemia Light cinnamon brown 'tuscarora' bark lends year round Tuscarora Hybrid 20 20 Yes 4 interest – drought Crape Myrtle resistant – likes a warm site Magnolia 'Elizabeth' Yellowish to cream Elizabeth Magnolia 30 20 Yes 5 N/A colored flower in spring. Great Plant Pick Magnolia 'Galaxy' Showy pink flowers. 25 25 Yes 5 Galaxy Magnolia Great Plant Pick Magnolia x loebneri Flower is ‘star’ shaped Loebner Magnolia 20 20 Yes 5 rather than tulip like – white to pinkish white in

APPENDIX G – RIGHT-OF-WAY STREET TREE LIST 10

Scientific & Common Mature Spread Under Min Strip Flower Fall Comments Name Height (ft) Wires/View Width (ft) Color Color (ft) Covenants March or April. Great Plant Pick Malus ‘Golden Disease resistant – Raindrops’ persistent yellow fruit in 20 20 Yes 5 Golden Raindrops fall and winter. Great Crabapple Plant Pick Malus 'Donald Large white blossom – Wyman' nice green foliage in 25 25 Yes 5 Donald Wyman summer Crabapple Malus 'Lancelot' Red flower buds, ('Lanzam') 15 15 Yes 4 blooming white – red Lancelot Crabapple persistent fruit Parrotia persica Blooms before it leafs Persian Parrotia out – drought tolerant - 30 20 No 5 Varied fall color - reds, oranges and yellows. Great Plant Pick Prunus ‘Frankthrees’ Burgundy colored leaves Mt. St. Helens Plum – tree best used as an 20 20 Yes 5 N/A accent rather than in mass plantings Prunus ‘Newport’ Burgundy colored leaves Newport Plum – tree best used as an 20 20 Yes 5 N/A accent rather than in mass plantings Prunus ‘Snowgoose’ This selection sports Snow Goose Cherry abundant white flowers 20 20 Yes 5 and healthy green, disease-resistant foliage Prunus x yedoensis Has masses of large, ‘Akebono’ semi-double, pink Akebono Flowering 25 25 Yes 6 flowers – most widely Cherry planted cherry in Pacific Northwest Sorbus alnifolia Simple leaves and Korean Mountain Ash 35 30 No 5 beautiful pink/red fruit. Great Plant Pick Stewartia Extraordinary cinnamon monodelpha colored bark – avoid hot, 30 20 Yes 5 Orange Bark dry sites. Great Plant Stewartia Pick Stewartia Patchwork bark, white psuedocamellia 25 15 Yes 5 flower in spring. Great Japanese Stewartia Plant Pick Styrax obassia Smooth gray bark and Fragrant Styrax 25 20 Yes 5 fragrant white flowers. Great Plant Pick

APPENDIX G – RIGHT-OF-WAY STREET TREE LIST 11

Unimproved Right-of-Way Trees

Scientific & Common Mature Spread Under Min Strip Flower Fall Comments Name Height (ft) (ft) Wires/View Width (ft) Color Color Covenants Pseudotsuga menziesii Unimproved right-of-way 80 30 No 20 N/A N/A Douglas Fir only Abies procera Unimproved right-of-way 60 25 No 20 N/A N/A Noble Fir only Pinus contorta Unimproved right-of-way 80 30 No 20 N/A N/A Shore Pine only Thuja plicata Unimproved right-of-way 70 25 No 15 N/A N/A Western Red Cedar only Pinus strobus Unimproved right-of-way 80 35 No 20 N/A N/A White Pine only Arbutus menziesii Unimproved right-of-way 80 40 No 15 N/A Pacific Madrone only Fraxinus latifolia No Unimproved right-of-way 80 60 20 Oregon Ash only Acer macrophyllum No Unimproved right-of-way 75 60 20 N/A Big Leaf Maple only Picea sitchensis No Unimproved right-of-way 80 30 20 N/A N/A Sitka Spruce only Tsuga No Unimproved right-of-way heterphylla/mertensiana only 70 30 20 N/A N/A Mountain/Western Hemlock Amelanchier alnifola Unimproved right-of-way Serviceberry only 25 20 Yes 5

APPENDIX G – RIGHT-OF-WAY STREET TREE LIST 12