Drought Tolerant: Alphabetical list
Acer circinatum - Vine Maple
Carpinus betulus - European Hornbeam
Cotinus coggygria var. purpurea - Purple Smoketree
Cotinus obovatus - American Smoketree
Fagus sylvatica - European Beech
Ginkgo biloba - Ginkgo
Liriodendron tulipifera - Tuliptree
Mahonia aquifolium - Oregon Grape
Myrica (Morella) pensylvanica - Northern Bayberry
Oxydendrum arboreum - Sourwood
Quercus bicolor (Missouri source) - Swamp White Oak (Missouri source)
Quercus palustris - Pin Oak
Quercus phellos - Willow Oak
Quercus rubra - Northern Red Oak
Syringa reticulata - Japanese Tree Lilac
Zelkova serrata - Japanese Zelkova
Carpinus betulus 'Columnaris Nana' - Dwarf Columnar European Hornbeam
Koelreuteria paniculata - Goldenraintree
Hamamelis virginiana - Common Witchhazel
Quercus coccinea - Scarlet Oak
Fagus grandifolia - American Beech
Hydrangea quercifolia 'Snowflake' - Snowflake Oakleaf Hydrangea
Corylopsis pauciflora - Buttercup Winterhazel
Liquidambar styraciflua - Sweetgum
Quercus prinus (montana) - Chestnut Oak, Basket Oak
Iris tenax - Oregon Iris
Camassia quamash - Camas Flower
Ostrya virginiana - Ironwood, Eastern Hophornbeam
Fothergilla x intermedia 'Mt. Airy' - Mt. Airy Dwarf Fothergilla
Ginkgo biloba 'Magyar' - Magyar Ginkgo
Ginkgo biloba 'Saratoga' - Saratoga Ginkgo
Hamamelis x intermedia 'Arnold's Promise' - Arnold's Promise Witchhazel
Quercus garryana - Oregon White Oak
Mahonia x media 'Winter Sun' - Winter Sun Mahonia
Ginkgo biloba 'Autumn Gold' - Autumn Gold Ginkgo
Hydrangea quercifolia 'Snow Queen' - Snow Queen Oakleaf Hydrangea
Erythronium oregonum - Giant or White Fawn Lily
Pistacia chinensis - Chinese Pistache
Quercus shumardii - Shumard Oak
Parrotia persica - Persian Ironwood/Parrotia
Hydrangea quercifolia 'Sike's Dwarf' - Sike's Dwarf Oakleaf Hydrangea
Syringa reticulata 'Ivory Silk' - Ivory Silk Japanese Tree Lilac
Cercis occidentalis - Western Redbud
Romneya coulteri - Matilija Poppy
Quercus ellipsoidalis - Northern Pin Oak
Cornus 'Eddie's White Wonder' - Eddie's White Wonder Dogwood
Heptacodium miconioides - Seven-Son Flower
Quercus alba - White Oak
Ginkgo biloba 'Princeton Sentry'® - Princeton Sentry® Ginkgo
Rosa nutkana - Nootka Rose
Mahonia repens - Creeping Mahonia
Mahonia x media 'Charity' - Charity Mahonia
Carpinus betulus 'Fastigiata' - Pyramidal European Hornbeam
Cornus nuttallii - Pacific Dogwood
Gaultheria shallon - Salal
Festuca roemeri - Roemer's Fescue
Mahonia nervosa - Cascades Mahonia
Hydrangea quercifolia 'Pee Wee' - Pee Wee Oakleaf Hydrangea
Hamamelis x intermedia 'Diane' - Diane Witchhazel
Achillea millefolium - Western Yarrow
Agoseris grandiflora - Large-flowered Agoseris
Aquilegia formosa - Western Red Columbine
Asclepias speciosa - Showy Milkweed
Symphyotrichum hallii - Hall's Aster
Brodiaea coronaria - Harvest or Crown Brodiaea
Carex tumulicola - Foothill Sedge
Clarkia amoena ssp. lindleyi - Farewell-to-Spring
Clarkia purpurea ssp. quadrivulnera - Small-flowered Godetia
Collinsia grandiflora - Large-flowered Blue-eyed Mary
Collomia grandiflora - Large-flowered Collomia
Danthonia californica - California Oatgrass
Dichelostemma congestum - Ookow, Clustered Lily
Elymus trachycaulus - Slender Wheatgrass
Eriophyllum lanatum var. leucophyllum - Oregon Sunshine
Geranium oreganum - Oregon Geranium
Gilia capitata - Blue Field Gilia
Koeleria macrantha - Prairie Junegrass
Ligusticum apiifolium - Celeryleaf-Licoriceroot
Lomatium dissectum - Fern-leaved Lomatium
Lomatium nudicaule - Bare-stemmed Lomatium
Lomatium utriculatum - Spring-Gold, Bladder Parsnip
Lupinus albicaulus - Sickle-keeled Lupine
Lupinus polyphyllus - Large-leaf Lupine
Madia elegans - Showy Tarweed, Common Madia
Madia gracilis - Common Tarweed, Grassy Tarweed
Perideridia gairdneri ssp. borealis - Squawroot or Yampah
Poa secunda (scabrella) - Pine-bluegrass
Potentilla glandulosa - Sticky Cinquefoil
Potentilla gracilis - Slender or Graceful Cinquefoil
Prunella vulgaris var. lanceolata - Lance Self-heal
Ranunculus occidentalis - Western Buttercup
Rupertia physodes - Scurf Pea
Sidalcea campestris - Meadow Checkermallow
Sidalcea malviflora ssp. virgata - Rose Checkermallow
Wyethia angustifolia - Narrowleaf Mule's Ear
Cotinus coggygria Golden Spirit® 'Ancot' - Golden Spirit® Smoketree
Hydrangea quercifolia 'Amethyst' - Amethyst Oakleaf Hydrangea
Viola adunca - Hookedspur Violet/Early-blue Violet
Toxicoscordion (Zigadenus) venenosus - Death Camas
Dodecatheon pulchellum - Shooting Star
Festuca californica - California Fescue
Clarkia rhomboidea - Rhombic-petalled Clarkia
Plectritis congesta - Rosy Plectritis
Balsamorhiza deltoidea - Deltoid Balsamroot
Calochortus tolmiei - Cat's Ear
Sisyrinchium idahoense - Idaho blue-eyed grass
Viola praemorsa (nuttallii) - canary violet
Asclepias fascicularis - Narrow-leaf Milkweed
Quercus suber - Cork Oak
Fagus sylvatica 'Riversii' - Riversii Purple European Beech
Fagus sylvatica 'Rohanii' - Purple Sawtooth European Beech
Camassia leichtlinii var. suksdorfii - Leichtlin's or Great Camas
Fagus sylvatica 'Roseomarginata' - Tri-color European Beech
Allium amplectens - Slim-leaf Onion
Artemisia douglasiana - Douglas' Sagewort
Epilobium densiflorum - Dense Spike-primrose
Lotus micranthus - Small-flowered Deervetch
Lotus purshianus - American Bird's-foot Trefoil
Luzula comosa (campestris) - Woodrush
Solidago lepida var. salebrosa - Western Goldenrod
Trifolium willdenowii - Springbank Clover
Achnatherum lemmonii - Lemmon's Needlegrass
Allium acuminatum - Tapertip or Hooker's Onion
Lupinus rivularis - riverbank lupine
Liquidambar styraciflua 'Slender Silhouette' - Slender Silhouette Sweetgum
Leptosiphon (Linanthus) bicolor - True Babystars
Rosa pisocarpa - Clustered Rose
Lupinus latifolius - Broad-leaved Lupine
Plagiobothrys nothofulvus - Rusty Popcorn Flower
Symphoricarpos albus - Snowberry
Carex pachystachya - Chamisso Sedge
Ginkgo biloba 'Mariken' - Mariken Ginkgo
Grindelia integrifolia - Gum Plant, Willamette Gumweed
Fagus sylvatica 'Dawyck Purple' - Dawyck Purple European Beech
Carpinus betulus 'Frans Fontaine' - Frans Fontaine European Hornbeam
Fagus sylvatica 'Dawyck Gold' - Dawyck Golden European Beech
Elymus glaucus - Blue Wildrye
Heracleum maximum (lanatum) - Cow Parsnip
Microsteris (Phlox) gracilis - Slender-leaved Microseris
Mahonia x media 'Arthur Menzies' - Arthur Menzies Mahonia
Symphytum x uplandicum 'Axminster Gold' - Variegated Russian Comfrey
Quercus hypoleucoides - Silverleaf Oak
Lupinus polycarpus (micranthus) - Smallflower Lupine
Rumex salicifolius - Willow Dock
Hydrangea quercifolia 'Munchkin' - Munchkin Oakleaf Hydrangea
Hydrangea quercifolia 'Ruby Slippers' - Ruby Slippers Oakleaf Hydrangea
Amsinckia menziesii var. intermedia - Common Fiddleneck
Downingia elegans - Showy Downingia
Quercus macrocarpa (North Dakota source) - Bur Oak (North Dakota)
Phacelia heterophylla - Varileaf phacelia
Hydrangea quercifolia 'Queen of Hearts' - Queen of Hearts Oakleaf Hyrdrangea