Tree And Landscaping Manual - Plant Materials

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Tree and Landscaping Manual - Plant MaterialsPlant Materials and the Suggested Plant ListsGeneralPortland maintains several Plant Lists: Suggested Plant Lists for Required Landscaping are part of the Tree and LandscapingManual, and apply to landscaping required by the Zoning Code. Portland Plant Lists are primarily lists of plants native to Portland, but also include theNuisance and Prohibited Plant Lists. These lists were first developed for use in the city’sEnvironmental Zones. Street Tree Lists are maintained by the Urban Forester, and apply to trees planted in theright-of-way. The Zoning Code generally does not apply to the right-of-way. Stormwater Management Manual, maintained by the Bureau of Environmental Services.For required landscaping, you may use any plants not on the Nuisance and ProhibitedPlants listed in the Portland Plant List.The Suggested Plant Lists for Required Landscaping are intended to assist you in selecting plantmaterials, but you do not have to limit yourself to plants on the lists. If you select plantsthat are not on the Suggested Plant Lists for Required Landscaping, you must provide theBureau of Development Services with the necessary growth and spacing characteristics. Thecharacteristics must come from objective sources, such as books, manuals, or cut sheets(printed nursery information).Ground Cover Plants Ground cover plants must be planted to fill in the area within 3 years. Grasses can countas ground cover plants. Mulch is not a substitute for ground cover plants. Mulch must be confined to areasunderneath plants. Ground cover plants, except turf grasses, must be at least four-inch pot size when planted. The ground cover plant lists include plant-spacing specifications for calculating how manyplants are required.Shrubs Shrubs must be planted to meet the height and screening requirements within 3 years. Shrubs must at least the 1-gallon size at planting. The shrub lists include spacing recommendations.Trees Trees may be broadleaf or coniferous, but must follow any plant diversity requirements. Broadleaf trees at the time of planting must be fully branched. Broadleaf trees planted must be a minimum of 1.5 inches in diameter. Conifer trees at the time of planting must be fully branched and a minimum of 5 feetin height. These minimum requirements do not apply to trees used for mitigation, remediation,or restoration.PLANTSTREE AND LANDSCAPING MANUALP.1lu landscp manual3603/09/17

Tree sizesTrees are categorized as large, medium or small based on their height and crown spread at maturity and on theirgrowth rate. Many trees have already been categorized in the Suggested Plant List included as a part of theLandscaping Manual.If you want to use a tree that is not already on the list, give the Bureau of Development Services (BDS) informationabout the tree’s growth rate, mature height and mature crown spread. Objective information may come from publishedsources, Internet Web sites or from the nursery providing the tree like cut sheets. You must also tell BDS where you gotthe information.Trees sizes are determined according to the Canopy Factor, which is calculated using the following formula:(mature height in feet) x (mature crown spread in feet) x (growth rate number) x 0.01 Canopy FactorThe growth rate number is 1 for slow growing trees, 2 for moderately growing trees, and 3 for fast growing trees.The Canopy Factor isgreater than 90 large treesfrom 40 to 90 medium treesless than 40 small treesBDS will update the Suggested Plant List from time to time to include additional trees and plants.Other RulesExisting vegetationYou may use existing landscaping or natural vegetation to meet the standards if you protect and maintain it duringconstruction as specified in Zoning Code Section 33.248.030.D.1, and if the plants are not listed in the Nuisance Plants List.Existing trees may be used to meet landscape requirements if they are protected and maintained during construction.Each existing tree 1.5 up to 6 inches in diameter counts as one small tree. Each existing tree 6 or more inches in diameter counts as 1 medium tree for each full 6 inch increment. For example, a 19-inch tree would count as three mediumtrees, while an 11-inch tree would count as one medium tree.Selection of materialsSelect and locate your landscape materials to produce a hardy and drought-resistant landscape area. Consider soil typeand depth, the amount of maintenance required, spacing, exposure to sun and wind, the slope and contours of the site,and compatibility with existing native vegetation preserved on the site. Arborescent shrubs from the Portland Plant Listmay not be used to meet the tree requirement.Prohibited materialsPlants listed as nuisance or prohibited in the Portland Plant Lists are prohibited in required landscaped areas. Prohibitedplants include plants identified by the Director of the Bureau of Development Services or the City Forester as potentiallydamaging to sidewalks, roads, underground utilities, drainage improvements, foundations, etc.Exceeding standardsYou may plant landscaping materials that exceed the standards so long as all fence or vegetation height limitations aremet, including the vision clearance standards of Title 16, Vehicles and Traffic.Complying with the standardsIt is the applicant’s responsibility to show that the landscaping materials proposed will comply with the standards.PLANTSTREE AND LANDSCAPING MANUALP.2lu landscp manual3703/09/17

Tree and Landscaping Manual - Suggested Plant ListsSuggested plant listsThese are lists of suggested plants for use in required landscaping. The listed species are not required, and individualplants listed are not suitable for all uses. Successful plantings depend on planting the appropriate plant for the site andproviding water and care adequate for the plants to survive and thrive.No single plant is best for all situations. Evaluate the conditions at your site as well as the uses that will exist after youcomplete your development before selecting your plant materials. Consider the amount of light and heat, if people willwalk across your planted area (and ways to prevent it), whether the landscaping will receive runoff from roofs or paving, the possibility that low hanging branches or dropped fruit will interfere with pedestrians or cars, and so on.It is your responsibility to ensure that the plants survive. The most common problem is a lack of water in the first one tothree summers. Plants that die must be replaced.Q What are the Suggested Plant Lists for Required Landscaping for?A The Suggested Plant Lists for Required Landscaping are meant to provide information about plants for general use, and tomake it easier for applicants to select plants. They also help staff to conduct plan reviews and inspections.Q What is the Portland Plant List?A The Portland Plant List is separate from the Suggested Plant Lists for Required Landscaping and the Tree andLandscaping Manual. It lists plants native to Portland, and includes Nuisance and Prohibited Plant Lists. Usingnative plants from the Portland Plant List is encouraged wherever conditions are suitable.Q Do I have to use native plants?A Native plants are required only in environmental zones, but they are recommended for use throughout the City.Native plants are suited to Portland’s climate and soil, and they require less watering, fertilizer and pesticide. Nativeplants also provide habitat for native wildlife.Q How can I use the Suggested Plant Lists?A First identify the characteristics of your site, then select plants that match those characteristics. For example, if youhave a planter 4 feet wide, you do not want to plant a tree that requires an 8-foot wide planter. Also, many parkinglots have a lot of reflected heat in the summer, so in a parking lot you will probably want to use a drought-tolerantplant that tolerates full sun.Q What if I want to use a plant that is not on the lists?A You must include information about the plant size and spacing requirements when you submit your plans. Theinformation may come from a commonly available reference, such as the Sunset Western Garden Book, or the Manual ofWoody Landscape Plants by M. A. Dirr, from a Web site or from a nursery, wherever it comes from, you must indicatethe source of the information. It is your responsibility to demonstrate that the Zoning Code’s planting and spacingrequirements will be met.You may propose to use any plant that is not on the Portland Nuisance and Prohibited Plant Lists.Q If I use a tree that is not on the list, how do I know what size it is?A Trees are categorized by size according to the Canopy Factor, which is calculated using the following formula:(mature height in feet) x (mature crown spread in feet) x (growth rate number) x 0.01 Canopy FactorThe growth rate number equals 1 for slow growing trees, 2 for moderately growing trees, and 3 for fast growingtrees. The Canopy Factor for large trees is greater than 90, for medium trees is from 40 to 90, and for small trees isless than 40.To find out how big trees will become at maturity, check printed sources or the Internet.Q How are the lists organized?A There are four lists: the Tree List, the High Screen Shrub List, the Low Screen Shrub List, and the Ground CoverList. Plant characteristics, such as height, spread, spacing, drought tolerance and so on, are provided to help youselect appropriate plants.PLANTSTREE AND LANDSCAPING MANUALP.3lu landscp manual3803/09/17

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Suggested Plant Lists for Required LandscapingTreesExplanation of column headings for trees:Min Planter Width: The minimum recommended planter width for the tree to be healthy.Height: The maximum observed height of this species in the Portland area.Spread: The maximum observed spread of this species in the Portland area.Growth Rate: The rate observed in the Portland area.Native: Identifies plants on the Portland Native Plant list (PDX), native to the Willamette Valley (WV) or native elsewhere inOregon (OR). Drought Tolerant: Identifies trees noted for adaptablility to drought and dry conditions. Canopy Factor Number: This is the canopy factor calculated by the Bureau of Development Services (BDS) using theformula described in the Tree and Landscaping Manual. Botanical NameCOMMON NAMEMinCanopyPlanterGrowthDrought FactorWidth Height Spread Rate Native Tolerant NumberRemarksLARGE TREESAlbizia julibrissin4’50’70’3Yes105Deciduous broadleaf, pinkSILK TREE, MIMOSA TREEpincushion flowers.Alnus glutinosa4’75’50’3113BLACK ALDERDeciduous broadleaf,tolerates moist or wet soils.Alnus rhombifolia4’100’50’3WV150Deciduous broadleaf, moreWHITE ALDERtolerant of heat or droughtthan A. rubra (Red Alder).Catalpa speciosa4’90’70’2126Deciduous broadleaf,NORTHERN CATALPAadaptable to wet or dryconditions, tolerates heat.Cedrus atlantica(also C. libani ssp ‘atlantica’)ATLAS CEDAR4’100’80’2160Cedrus deodara4’70’75’2105DEODAR CEDAREvergreen conifer.Evergreen conifer, prefersdrier soils than C. atlantica.Celtis occidentalis4’100’70’2Yes140Deciduous broadleaf, droughtCOMMON HACKBERRYtolerant, does not liftpavement.Cladrastis kentukea6’75’70’2105Deciduous broadleaf, fragrantAMERICAN YELLOWWOODsummer blooms, prune insummer.Cupressocyparis leylandiiLEYLAND CYPRESS4’70’60’3126Fagus sylvatica8’80’100’2160EUROPEAN BEECHPLANT LISTTREE AND LANDSCAPING MANUALlu landscp manual03/09/17Evergreen conifer.Deciduous broadleaf, needsmoderate water, lowestbranches brush close toground and may needpruning, can suppress lawngrowth under older trees.PL.140

Botanical NameCOMMON NAMEMinCanopyPlanterGrowthDrought FactorWidth Height Spread Rate Native Tolerant NumberRemarksLARGE TREESFraxinus angustifoliaNARROWLEAF ASH4’70’70’298Deciduous broadleaf.Fraxinus excelsiorEUROPEAN ASH4’70’70’298Deciduous broadleaf.Fraxinus pennsylvanica4’100’100’2200‘Cimmaron,’ ‘Marshall,’‘Urbanite’GREEN ASHDeciduous broadleaf‘Marshall’ is not as large, butstill grows up to 75’ tall.Liquidambar styraciflua8’90’60’3162Deciduous broadleaf,SWEET GUMtolerates damp soil, needsroom for root development,prone to lifting pavement.Cultivar ‘Rotundiloba’reduces fruit drop.Liriodendron tulipifera8’100’803240Deciduous broadleaf, needsTULIP TREEroom for root development,prefers summer watering.Pinus nigraAUSTRIAN PINE4’100’50’2100Evergreen conifer.Platanus acerifolia4’80’95’3Mod231Deciduous broadleaf, these‘Yarwood’, ‘Bloodgood’,varieties resistant tox hispanica, ‘Columbia’anthracnose; tolerateLONDON PLANE TREEreflected heat, dust, soot, andsmog. Other varieties moresubject to red spider mites,powdery mildew, andanthracnose.Pseudotsuga menziesii8’240’60’2PDXYes288Evergreen conifer, can growDOUGLAS FIRvery tall given time, tends todrop needles and cones year-round, prune lower branchesfor clearance, older treesdrop large branches.Quercus alba4’100’100’1100Deciduous broadleaf, doesWHITE OAKbest in slightly acid, well-drained soils.Quercus coccinea4’100’75’2Yes150OAK, SCARLETDeciduous broadleaf, fallcolor, drought tolerant.Quercus garryana8’100’100’1PDXYes100Deciduous broadleaf, droughtOREGON WHITE OAKtolerant.Quercus imbricaria4’80’80’2128Deciduous broadleaf, pestSHINGLE OAKresistant.Quercus keloggii4’80’80’2WVYes128CALIFORNIA BLACK OAKDeciduous broadleaf, droughttolerant, good fall color, canbe host to Sudden Oak Death.Quercus lobata4’100’100’3Yes375Deciduous broadleaf,VALLEY OAK, orCalifornia native, droughtCALIFORNIA WHITE OAKtolerant.Quercus macrocarpa4’90’90’2160Deciduous broadleaf, littersBUR OAKlarge acorns.PLANT LISTTREE AND LANDSCAPING MANUALlu landscp manual03/09/17PL.241

Botanical NameCOMMON NAMEMinCanopyPlanterGrowthDrought FactorWidth Height Spread Rate Native Tolerant NumberRemarksLARGE TREESQuercus nigra4’100’100’3300Deciduous broadleaf,WATER OAKtolerates wet conditions, hasweak wood.Quercus phellos4’90’100’2180Deciduous broadleaf, slenderWILLOW OAKform when young, morerounded with time.Quercus robur4’80’80’2128ENGLISH OAKDeciduous broadleaf, litters,short-lived, can be invasive.Variety ‘Fastigiata’ is lessspreading, but has CanopyFactor # of 100.Quercus rubra4’100’100’3300RED OAKDeciduous broadleaf, needssummer water, can becomevery large over time, can behost to Sudden Oak Death.Quercus shumardii4’150’90’2Yes270Deciduous broadleaf, moreSHUMARD RED OAKdrought tolerant than otherred oaks, tolerates poorlydrained soil.Quercus velutina4’75’115’3258BLACK OAKDeciduous broadleaf, fastergrowth with summerirrigation, tolerates widerange of soil types.Quercus virginiana4’60’100’3180SOUTHERN LIVE OAKEvergreen broadleaf,tolerates moisture.Quercus wislizenii4’70’70’2Yes98INTERIOR LIVE OAKEvergreen broadleaf, westernnative, drought tolerant.Sequoia sempervirens12’100’503150Evergreen conifer, growsCOAST REDWOODtall, prefers to be watered insummer, not best for hot, drysites, can be a host toSudden Oak Death.Sequoiadendron giganteum16’115’55’3Yes189Evergreen conifer, trunkGIANT SEQUOIAquickly becomes massive,needs ample space.Taxodium distichum8’100’60’2120Deciduous conifer, toleratesBALD CYPRESSwet conditions or dryconditions, prefers summerirrigation.Thuja plicata8’150’70’1PDX105Evergreen conifer, prefersWESTERN RED CEDARmoist conditions and shadeuntil established, thendrought tolerant.Characteristic form lost iflow-hanging branches arepruned.PLANT LISTTREE AND LANDSCAPING MANUALlu landscp manual03/09/17PL.342

Botanical NameCOMMON NAMEMinCanopyPlanterGrowthDrought FactorWidth Height Spread Rate Native Tolerant NumberRemarksLARGE TREESTilia americana4’100’75’2150Deciduous broadleaf, deepLINDEN, AMERICAN, orrich soil, plenty of water,AMERICAN BASSWOODprone to aphids, which causeit to drip honeydew anddevelop sooty mold.‘Redmond’ is a usefulcultivar, but this tree is not agood choice for parking lots.Tsuga heterophylla4’150’70’2210WESTERN HEMLOCKEvergreen conifer, prefersmoist or seasonally wet soils.Umbellularia californica4’75’75’2ORYes112Evergreen broadleaf, droughtOREGON MYRTLE,tolerant, best in deep soil,CALIFORNIA LAUREL,can be host for Sudden OakCALIFORNIA BAYDeath.Zelkova serrata8’85’753Yes192Deciduous broadleaf, prune‘Green Vase’when young, aggressiveZELKOVAroots.MEDIUM TREESAbies concolorWHITE FIR4’100’40’1Yes40Evergreen conifer.Abies grandis8’150’40’1PDX60Evergreen conifer, can growGRAND FIRvery tall, can get aphids, canbe a host for Sudden OakDeath.Acer x freemanii‘Jefferson Red’JEFFERSON RED MAPLE4’60’40’360Deciduous broadleaf.Acer macrophyllum8’75’60’2PDX90Deciduous broadleaf, plantMAPLE, BIG LEAFfrom containerized stock,roots lift pavement, can hostSudden Oak Death.Acer nigrum‘Greencolumn’GREENCOLUMN MAPLE4’70’30’242Deciduous broadleafAcer rubrum4’70’60’284Deciduous broadleafRED MAPLE‘Bowhall’ is a smaller – butstill medium size – cultivar,reaching 50 feet in heightand 30 feet in spread.Aesculus hippocastanum4’105’80’289Deciduous broadleaf,‘Baumannii’Baumannii is fruitless, otherBAUMANN HORSEvarieties drop fruit. NeedsCHESTNUTsummer water. Can be hostto Sudden Oak Death.Alnus rubra4’60’40’3PDX72Deciduous broadleaf, shortRED ALDERlived, needs moisture,favored by tent caterpillars.This tree tends to suffer sunscald.PLANT LISTTREE AND LANDSCAPING MANUALlu landscp manual03/09/17PL.443

Botanical NameCOMMON NAMEMinCanopyPlanterGrowthDrought FactorWidth Height Spread Rate Native Tolerant NumberRemarksMEDIUM TREESCalocedrus decurrens4’100’30’2OR60Evergreen conifer, fragrant,INCENSE CEDARheat tolerant, deep wateringwhen young will make itdrought tolerant later.Carpinus betulus,4’60’70’284Deciduous broadleaf, hardy,except ‘Fastigiata’densely pyramidal.EUROPEAN HORNBEAMCeltis australis4’95’45’2Yes85Deciduous broadleaf, mod.EUROPEAN HACKBERRYirrigation, drops fruit, best tobuy in container, does not liftpavement.Celtis ‘Magnifica’4’50’40’360MAGNIFICA HACKBERRYDeciduous broadleaf, fastgrowing, insect resistant.Chamaecyparis nootkatensis6’100’25’250Evergreen conifer, does not‘Pendula’tolerate high heat well, doesNOOTKA CYPRESS,tolerate poor soil, prefersALASKA YELLOW CEDARsummer water.Fraxinus americana4’60’75’290Deciduous broadleaf.WHITE ASH‘Chicago Regal’ is a usefulcultivar that reaches about45 feet height and 35 feetspread. ‘Skyline,’ and‘Junginger’ are also goodcultivars.Fraxinus angustifolia4’50’50’375(also F. oxycarpa)RAYWOOD ASH,CLARET ASHDeciduous broadleaf,compact, produces no seeds,good fall color.Fraxinus latifolia4’60’40’2PDXYes48Deciduous broadleaf,ASH, OREGONtolerates wet conditions andsummer drought.Fraxinus nigra4’80’40’264Deciduous broadleaf,BLACK ASHtolerates wet soil.Fraxinus ornus4’60’35’363Deciduous broadleaf,FLOWERING ASHfragrant late-spring flowers.Fraxinus pennsylvanica4’45’35’363Deciduous broadleaf.‘Patmore’‘Patmore’ is seedless, smallerPATMORE ASHthan other F. pennsylvanicacultivars.Fraxinus quadrangulata4’60’70’2Yes84Deciduous broadleaf,BLUE ASHdrought tolerant.Magnolia kobusKOBUS MAGNOLIA4’70’60’284Deciduous broadleaf, hardy.Metasequoia8’70’30’363Deciduous conifer, prefersglyptostroboidesmoist soils, needs room forDAWN REDWOODroot development, trunk canbecome quite large.PLANT LISTTREE AND LANDSCAPING MANUALlu landscp manual03/09/17PL.544

Botanical NameCOMMON NAMEMinCanopyPlanterGrowthDrought FactorWidth Height Spread Rate Native Tolerant NumberRemarksMEDIUM TREESMorus alba4’50’60’2Yes60Deciduous broadleaf, soilWHITE MULBERRYadaptable, drought tolerant.Females display attractiveblossoms, bear edible fruitthat attracts birds, is messyand stains pavement. Maleslack blossoms and fruit,require less maintenance.Nothofagus obliquaBEECH, ROBLE4’70’40’384Deciduous broadleafNyssa sylvatica4’75’60’290Deciduous broadleaf, goodTUPELO, SOUR GUMfall color, tolerates wetconditionsOstrya virginiana4’70’60’1Yes42AMERICAN HOPHORNBEAMDeciduous broadleaf,drought tolerant, pyramidalform in youth, becomesmore rounded with age.Phellodendron amurense4’50’35’3Yes45Deciduous broadleaf,CORK TREEdrought tolerant, smogtolerant, tends to havespreading habit. ‘Macho’ is auseful cultivar.Pinus monticola8’75’45’2WV68Evergreen conifer, veryWESTERN WHITE PINEhardy, year-round needledropPinus ponderosa ssp. Valley8’85’50’2PDXYes86Evergreen conifer, prefersPONDEROSA PINE,drier conditions, but ValleyValley subspeciessubspecies is adapted toWillamette Valley climate.Pistacia chinensis4’70’70’1Yes49Deciduous broadleaf,CHINESE PISTACHEdrought tolerant, fall color,young tree can be lopsided,gawky, may need pruning toshape.Prunus cerasifera4’45’50’245CHERRY PLUMDeciduous broadleaf,attractive spring blossomsPrunus sargentii,4’45’45’241‘Columnaris’ or ‘Rancho’SARGENT CHERRYDeciduous broadleaf, exceptfor hardiest oforiental cherriesPrunus x yedoensis4’40’60’248Deciduous broadleaf,YOSHINO CHERRYattractive spring blossomsand fall color.Pyrus calleryana ‘Aristocrat’4’50’30’345Deciduous broadleaf,CALLERY PEARattractive spring blossoms.‘Aristocrat’ is a medium-sizecultivar. Avoid columnarcultivars, e.g., ‘Capital,’‘Chanticleer.’Quercus acutissimaSAWTOOTH OAK4’PLANT LISTTREE AND LANDSCAPING MANUALlu landscp manual03/09/1760’50’390Deciduous broadleaf.PL.645

Botanical NameCOMMON NAMEMinCanopyPlanterGrowthDrought FactorWidth Height Spread Rate Native Tolerant NumberRemarksMEDIUM TREESQuercus bicolor4’60’70’284SWAMP WHITE OAKDeciduous broadleaf,tolerates wet soil, but alsothrives in well-drained soil.Quercus frainetto4’50’30’3Yes45Deciduous broadleaf,‘Forest Green,’ ‘Schmidt’drought tolerant, dropsFOREST GREEN OAKacorns.Quercus ilex5’70’55’2Yes77Evergreen broadleaf, droughtHOLLY OAK, HOLM OAKtolerant, can be host toSudden Oak Death.Quercus palustris4’60’75’290PIN OAKDeciduous broadleaf,tolerates wet and poorlydrained soils, can bedamaged by alkaline soils.Quercus suber4’45’45’2Yes41Evergreen broadleaf, droughtCORK OAKtolerant, attractive bark,needs good drainage. Thevariety ‘Occidentalis’ ishardy.Sassafras albidium4’90’60’154Deciduous broadleaf, fallCOMMON SASSAFRAScolor, tends to producesuckers, grows quickly to 20’,then slows.Sophora japonica4’50’75’2Yes76Deciduous broadleaf,JAPANESE PAGODA TREEadaptable to soil and waterconditions, pest free.Tilia cordata4’85’50’286Deciduous broadleaf, deepLINDEN, LITTLE LEAFrich soil, plenty of water,prone to aphids, which causeit to drip honeydew anddevelop sooty mold.Tilia x euchlora4’60’50’260Deciduous broadleaf,CRIMEAN LINDENtolerates heat, aphid free.Older trees develop low-hanging branches.Tilia tomentosa4’60’50’3Yes90‘Sterling’SILVER LINDENDeciduous broadleaf,drought tolerant onceestablished, aphid free.Ulmus ‘Accolade,’4’60’50’360Deciduous broadleaf, disease‘Morton Glossy’ (Triumph),resistant, beautiful leaf,‘Pioneer’drops papery seeds. TheELMlisted cultivars are diseaseresistant.Ulmus parvifolia ‘Athena’,4’60’60’272Deciduous or evergreen‘Allee’broadleaf, excellent diseaseCHINESE ELMresistance, mod. irrigation,frequent pruning.PLANT LISTTREE AND LANDSCAPING MANUALlu landscp manual03/09/17PL.746

Botanical NameCOMMON NAMEMinCanopyPlanterGrowthDrought FactorWidth Height Spread Rate Native Tolerant NumberRemarksSMALL TREESAcer buergerianum4’40’30’1Yes12Deciduous broadleaf,(also A. buergeranum)drought tolerant.TRIDENT MAPLEAcer campestre4’50’30’115Deciduous broadleaf, airHEDGE MAPLEpollution tolerant.Acer davidii4’50’20’2Yes20DAVID MAPLEDeciduous broadleaf,somewhat drought tolerant.Acer ginnala4’30’30’327Deciduous broadleaf, hardyAMUR MAPLEand adaptable.Acer grandidentatum4’60’40’1Yes24BIGTOOTH MAPLE, ROCKYMOUNTAIN SUGAR MAPLEDeciduous broadleaf,drought tolerant, ‘Schmidt’ isa locally developed cultivar.Acer griseum4’25’20’210PAPERBARK MAPLEDeciduous broadleaf,tolerates partial shade,attractive bark and fall color.Acer miyabei‘Morton,’ ‘State Street’STATE STREET MAPLEDeciduous broadleaf.4’45’35’232Acer negundo4’30’25’1Yes8Deciduous broadleaf, very’Flamingo,’ ‘Sensation’hardy, tolerates drought, wetBOXELDERconditions, poor soils.Subject to various diseases,hosts boxelder bugs.‘Flamingo’ is a smallercultivar. ‘Sensation’ is slowergrowing, and is all maleclones. Male plants arecleaner.Acer palmatum4’20’20’14Deciduous broadleaf,(except ‘Dissectum’ varieties)attractive color. SelectJAPANESE MAPLEupright forms. Good varietiesinclude ‘Atropurpureum,’‘Bloodgood,’ ‘HeptalobumOsakazuki,’ ’Oshio Beni,’ and‘Senkaki.’Acer WINELEAF MAPLEDeciduous broadleaf,somewhat sensitive to heat.Acer rufinerve4’60’30’118Deciduous broadleaf, youngREDVEIN MAPLEbark is green striped,becomes gray with age.Prefers dryer soils.Acer saccharum4’60’50’130Deciduous broadleaf, fairlySUGAR MAPLEdrought tolerant, fall color,(except ‘Legacy’)‘Green Mountain’ is the mostdrought tolerant cultivar.PLANT LISTTREE AND LANDSCAPING MANUALlu landscp manual03/09/17PL.847

Botanical NameCOMMON NAMEMinCanopyPlanterGrowthDrought FactorWidth Height Spread Rate Native Tolerant NumberRemarksSMALL TREESAesculus flava6’55’50’128YELLOW BUCKEYEDeciduous broadleaf, fruitand leaf drop can be messy,needs room to develop.Betula jaquemontiiWHITE-BARKEDHIMALAYAN BIRCHDeciduous broadleaf.4’75’30’123Betula nigra4’70’50’135Deciduous broadleaf, needsRIVER BIRCHsummer water, resistant tobirch borer.Betula papyrifera4’70’50’135PAPER BIRCHDeciduous broadleaf, doesnot tolerate heat.Carpinus betulus4’30’10’26Deciduous broadleaf,‘Fastigiata,’ ‘Franz Fontaine’columnar forms. OlderEUROPEAN HORNBEAMspecimens of ‘Fastigiata’have been observed to reach30 feet in diameter. Potentialavailability problems.Carpinus caroliniana4’40’50’120AMERICAN HORNBEAMDeciduous broadleaf,rounded form, URA TREEDeciduous broadleaf, needsample water to establish.Cercis canadensis4’30’30’19Deciduous broadleaf, trunkEASTERN REDBUDusually branches close toground, spreading crown.Cornus alternifolia4’40’40’116PAGODA DOGWOODDeciduous broadleaf, prefersacidic soils, moisture.Cornus controversa4’40’40’116Deciduous broadleaf, prefersGIANT DOGWOODmoisture.Cornus kousa4’40’40’232Deciduous broadleaf, prefersKOUSA DOGWOODmoist soil, but is moderatelydrought tolerant.Cornus mas4’30’30’19CORNELIAN CHERRYDeciduous broadleaf,tolerates various soil types.Crataegus suksdorfii,4’40’45’1PDX18Deciduous broadleaf,BLACK HAWTHORNtolerates wet areas. This isthe only species of Hawthornallowed in requiredlandscaping.Eucalyptus pauciflora ssp.4’35’35’2Yes25Deciduous broadleaf,niphophila, ssp. Deberzevilleidrought tolerant, deepSNOW GUMrooted.PLANT LISTTREE AND LANDSCAPING MANUALlu landscp manual03/09/17PL.948

Botanical NameCOMMON NAMEPlanterGrowthDrought FactorWidth Height Spread Rate Native Tolerant NumberRemarksSMALL TREESFagus sylvatica4’30’20’16‘Tricolor’TRICOLOR BEECHDeciduous broadleaf, leavesstart purple, then turn greenedged with pink and whiteGinkgo biloba,4’60’60’136Deciduous broadleaf, formGINKGO,varies, old trees may reachMAIDENHAIR TREE60 feet. Use the male only;female produces messy,smelly fruit. ‘Autumn Gold,’‘Shangri-La,’ and ‘Saratoga’are good cultivars.Gleditsia triacanthos4’40’40’2Yes32Deciduous broadleaf,HONEYLOCUSTtolerates a wide range ofconditions, produces a largeseedpod, but seedlessvarieties are available.Gymnocladus dioicus4’50’35’2Yes36Deciduous broadleaf, heatKENTUCKY COFFEE TREEand drought tolerant,saplings grow very fast, thenslow down. Seed podsproduce litter. ‘Espresso’ is aseedless variety.Koelreuteria bipinnata4’30’30’218Deciduous broadleaf,CHINESE FLAME TREEadaptable to soil conditions,heat tolerant, produces someseed litter.Koelreuteria paniculata4’30’30’218Deciduous broadleaf, mod.(also K. bipinnata)irrigation, yellow summerGOLDENRAINflowers, produces some seedlitter; tolerates cold, heat,drought, wind, and alkalinesoil. Needs watering whenyoung.Lagerstroemia indica4’35’35’112Deciduous broadleaf, fullx L. fauriei, ‘Catawba,’sun, summer flowers,‘Cherokee,’ ‘Pecos’summer water, goodCRAPE MYRTLEdrainage.Laurus nobilis4’30’15’1Yes5Evergreen broadleaf, needsSWEET BAYgood drainage, droughttolerant, best in filtered orafternoon shade, tends tosend up suckers.Maackia amurensis4’25’20’15Deciduous broadleaf,AMUR MAACKIAadaptable to different soils,prefers sunny exposures.Magnolia ’Elizabeth’ELIZABETH MAGNOLIA4’25’25’16Deciduous broadleaf.Magnolia grandiflora4’40’40’116Evergreen broadleaf, growthSOUTHERN MAGNOLIArate varies by cultivar, veryslow without irrigation, dropsleaves and petals. Goodcultivars include ‘DDBlanchard,’ ‘Edith Boge,’‘Victoria.’PLANT LISTTREE AND LANDSCAPING MANUALlu landscp manual03/09/17PL.1049

Botanical NameCOMMON NAMEPlanterGrowthDrought FactorWidth Height Spread Rate Native Tolerant NumberRemarksSMALL TREESMagnolia x soulangianaSAUCER MAGNOLIA4’40’40’116Deciduous broadleaf.Magnolia stellataSTAR MAGNOLIA4’30’20’16Deciduous broadleaf.Malus cvs.4’20’20’2PDX,8Deciduous broadleaf,CRABAPPLEone sp.adaptable to wide range ofconditions, but prefers moist,acidic soil. M. fusca, WesternCrabapple, is native toPortland.Morus nigra4’30’40’112BLACK MULBERRYDeciduous broadleaf, ediblefruit. Birds attracted by fruit,fruit drop can be messy.Nothofagus dombeyiBEECH, SOUTH AMERICANEvergreen broadleaf.4’85’40’134Parrotia persica4’40’30’112PERSIAN PARROTIA,PERSIAN IRONWOODDeciduous broadleaf, goodautumn color.Picea pungens var. glauca4’50’20’110COLORADO BLUE SPRUCEEvergreen conifer, veryadaptable, more droughttolerant than other spruces.Pinus contorta var.4’40’30’1OR12Evergreen conifer, needscontorta,good drainage, year-roundSHORE PINEneedle drop.Populus tremuloides4’25’15’1OR4QUAKING ASPENDeciduous broadleaf,requires regular watering.Use in stormwater facilities.Roots are invasive; avoidplanting near pavement,sewer lines, or septic tanks.Prunus ‘Amanogawa’4’40’30’224Deciduous broadleaf. ThisAMANOGAWAtree grows in a relativelyFLOWERING CHERRYcolumnar form, in contrast toother flowering cherries,which are spreading.Prunus padus4’50’50’125Deciduous broadleaf,BIRD CHERRYadaptable to range of soilconditions, lovely blossomsproduce fruits that attractbirds.Prunus serrulata cvs.4’30’30’218Deciduous broadleaf, lovelyJAPANESE FLOWERINGspring blossoms, good fallCHERRYcolor.Pyru

TREE AND LANDSCAPING MANUAL lulandscpmanual 03/09/17 37 PLANTS P.2 Tree sizes Trees are categorized as large, medium or small based on their height and crown spread at maturity and on their growth rate. Many trees have already been categorized in the Suggested Plant List inclu

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