Leaf Spot
Symptom category — not a single disease
543 host plants · Fungal
Last updated
Data Coverage 3 of 6 dimensions
Brown or purple circular spots appear on leaves in early summer, often starting on older foliage and spreading rapidly in wet weather. The spots enlarge quickly, and the leaf tissue dies from the center outward. On some hosts like cherry, you'll see a distinctive shothole effect where the dead tissue drops out entirely. Yellow halos or a green-island effect, where healthy tissue stays green while the rest yellows, are common signs. Heavy rain and overhead irrigation throughout spring amplify the problem.
Leaf spot diseases matter because early defoliation weakens trees and shrubs, reduces flowering the following year, and can girdle fruit stems causing fruit drop. Your best defense is eliminating conditions that favor the fungi: rake and destroy fallen leaves in autumn to eliminate overwintering spores, improve air circulation through pruning and proper spacing, and avoid wetting foliage with overhead irrigation. In severe cases, fungicide sprays starting at bud break help, but prevention through cultural practices works best in wet, humid climates.
Quick Reference
Agent Type
fungal
Causal Agent
Symptom category — not a single disease
Host Plants
543
Management
Cultural Controls
- Remove and destroy infected leaves in fall to reduce overwintering inoculum.
- Improve air circulation through selective pruning and proper plant spacing.
- Avoid overhead irrigation; water at the base of plants.
- Apply urea to fallen leaves in autumn to accelerate decomposition before spring spore release.
- Mulch under affected plants to suppress splash dispersal of spores from soil.
Host Plants (543)
Acer buergerianum Trident Maple, Three-toothed Maple Acer campestre Hedge Maple, Field Maple, Common Maple Acer capillipes Red Stripebark Maple, Red Snakebark Maple, Hakkoda Maple Acer carpinifolium Hornbeam Maple Acer circinatum Vine, Maple Acer coriaceifolium Leatherleaf Maple Acer crataegifolium Hawthorn, Maple Acer davidii David Maple, Père David's Maple Acer freemanii Freeman Maple, Hybrid Red Maple Acer ginnala Acer ginnala Acer glabrum Rocky Mountain Maple, Rock Maple, Douglas Maple, Dwarf Maple Acer glabrum var. douglasii Douglas Maple, Dwarf Maple, Rocky Mountain Maple Acer grandidentatum Bigtooth Maple, Western Mountain Sugar Maple, Rocky Mountain Sugar Maple Acer griseum Paperbark Maple Acer henryi Henry's Maple Acer japonicum Fullmoon Maple Acer macrophyllum Bigleaf Maple Acer maximowiczianum Nikko Maple Acer miyabei Miyabe Maple Acer monspessulanum Montpellier Maple Acer negundo Boxelder Manitoba Maple, Ash-leaved Maple Acer nipponicum Nippon Maple Acer oblongum Evergreen Maple, Smooth Leaf Maple Acer oliverianum Oliver Maple Acer opalus subsp. obtusatum Bosnian Maple Acer palmatum Japanese Maple Acer palmatum var. dissectum Dissected Japanese Maple Acer pensylvanicum Striped Maple, Moosewood Maple Acer pentaphyllum Acer pentaphyllum (no common name) Acer pictum Painted Maple Acer platanoides Norway Maple Acer pseudoplatanus Planetree Maple, Sycamore, Maple Acer rubrum Red Maple Acer rufinerve Redvein Maple, Honshu Maple Acer saccharinum Silver Maple Acer saccharum Sugar Maple Acer sempervirens Cretan Maple Acer shirasawanum Shirasawa Maple Acer spicatum Mountain Maple, Moose Maple Acer tataricum Tatarian Maple, Tartarian Maple Acer tataricum subsp. ginnala Amur Maple Acer tegmentosum Manchurian Stripebark Maple, Manchustriped Maple Acer triflorum Three Flowered Maple Acer truncatum Purpleblow Maple, Shantung Maple Acer velutinum Velvet Maple Adenium obesum Desert Rose, Desert Azalea, Mock Azalea Alnus alnobetula Circumpolar alder group Alnus alnobetula subsp. crispa American Green Alder, Mountain Alder, Green Alder Alnus alnobetula subsp. sinuata Sitka Alder, Wavy Leaf Alder Alnus cordata Italian Alder Alnus glutinosa Common Alder, European Alder, Black Alder Alnus incana subsp. rugosa Speckled Alder Alnus incana subsp. tenuifolia Thinleaf Alder, Mountain Alder Alnus japonica Japanese Alder Alnus rhombifolia White Alder Alnus rubra Red Alder Alnus rubra f. pinnatisecta Cutleaf Red Alder Alnus sinuata Sitka Alder Andromeda polifolia Bog Rosemary Aquilegia Columbine Arbutus menziesii Pacific Madrone Arbutus unedo Strawberry Tree, Killarney Strawberry Tree, Madroño Arctostaphylos andersonii Santa Cruz Manzanita, Anderson's Manzanita, Heartleaf Manzanita Arctostaphylos austin Arctostaphylos austin Arctostaphylos bakeri Baker Manzanita Arctostaphylos canescens Hoary Manzanita, Downy-leaf Manzanita Arctostaphylos columbiana Hairy Manzanita Arctostaphylos confertiflora Santa Rosa Island Manzanita Arctostaphylos densiflora Sonoma Manzanita, Vinehill Manzanita Arctostaphylos edmundsii Little Sur Manzanita Arctostaphylos hookeri Hooker's Manzanita, Monterey Manzanita Arctostaphylos hookeri subsp. franciscana Franciscan Manzanita Arctostaphylos insularis Island Manzanita Arctostaphylos manzanita Parry Manzanita, Common Manzanita Arctostaphylos montaraensis Montara Manzanita Arctostaphylos nevadensis Pinemat Manzanita Arctostaphylos pajaroensis Pajaro Manzanita Arctostaphylos patula Green Manzanita Greenleaf Manzanita, Buckbrush Arctostaphylos pumila Sandmat Manzanita, Dune Manzanita Arctostaphylos pungens Ponitleaf Manzanita, Mexican Manzanita Arctostaphylos refugioensis Refugio Manzanita Arctostaphylos rudis Shag Bark Manzanita, Sand Mesa Manzanita Arctostaphylos tomentosa Wolly Manzanita, Woollyleaf Manzanita, Downy Manzanita Arctostaphylos uva Kinnikinnik Kinnikinick, Bearberry Arctostaphylos viridissima Arctostaphylos viridissima Arctostaphylos white Arctostaphylos white Armoracia rusticana Horseradish Aster Alpine Aster Aucuba japonica Japanese Aucuba, Japanese Laurel Begonia Hardy Begonia Berberis aquifolium Oregon Grape, Oregon Grape Holly, Tall Oregon Grape Berberis buxifolia Berberis buxifolia Berberis darwinii Darwin Barberry Berberis emerald Berberis emerald Berberis fremontii Fremont Barberry, Fremont Mahonia Berberis gladwynensis Berberis gladwynensis Berberis jamesiana James Barberry Berberis julianae Wintergreen Barberry Berberis mentorensis Mentor Barberry Berberis nervosa Longleaf Mahonia Cascade Mahonia Berberis pruinosa Pruinosa Barberry Berberis repens Creeping Mahonia Berberis replicata Evergreen Barberry Berberis stenophylla Rosemary Barberry Berberis thunbergii Japanese Barberry Berberis thunbergii var. atropurpurea Purple (Red) Leafed Japanese Barberry Berberis triacanthophora Threespine Barberry, Wisley Barberry Berberis verruculosa Warty Barberry Betula lenta Sweet Birch, Cherry Birch, Black Birch Buxus bodinieri Bodinier's Boxwood Buxus microphylla Buxus microphylla Buxus microphylla var. koreana Korean Littleleaf Boxwood Buxus sempervirens Common Boxwood, Common Box European Box Camellia japonica Japanese Camellia Camellia sasanqua Sasanqua Camellia Ceanothus centennial Centennial Ceanothus Ceanothus concha Concha Ceanothus Ceanothus cuneatus Narrowleaf Buckbrush Common Buckbrush, Wedgeleaf Ceanothus, Greasewood Ceanothus dark Ceanothus, dark Ceanothus delilianus Ceanothus, delilianus Ceanothus gloriosus Point Reyes Ceanothus, Glorymat Ceanothus Ceanothus griseus var. horizontalis Carmel Creeper Ceanothus Ceanothus impressus Santa Barbara Ceanothus Ceanothus integerrimus Deer Brush Ceanothus sanguineus Redstem Ceanothus, Buckbrush, Oregon-tea Ceanothus thyrsiflorus Blue Blossom Ceanothus velutinus Snowbrush, Cinnamon Bush, Tobacco Bush, Shiny-leaf Ceanothus Cistus purpureus Orchid Rockrose Cornus alba Tatarian Dogwood, Tartarian Dogwood Cornus alternifolia Pagoda Dogwood Cornus amomum Silky Dogwood Cornus canadensis Bunchberry Cornus capitata Evergreen Dogwood, Bentham's Cornel, Himalayan Strawberry Tree Cornus controversa Giant Dogwood Cornus drummondii Rough-leaved Dogwood Cornus eddies Cornus eddies Cornus elwinortonii Cornus elwinortonii Cornus florida Flowering Dogwood Cornus kousa Kousa Dogwood Cornus mas Corneliancherry Dogwood Cornus nuttallii Pacific Dogwood Cornus officinalis Japanese Cornelian Dogwood Korean Cornelian Dogwood, Chinese Cornelian Dogwood Cornus porlock Porlock Dogwood Cornus racemosa Gray Dogwood, Red Panicle Dogwood Cornus rutgersensis Cornus rutgersensis Cornus sanguinea Bloodtwig Dogwood Cornus sericea Cornus sericea Cornus sericea subsp. occidentalis Western Dogwood, Creek Dogwood Cornus stolonifera Redosier Dogwood Cornus torreyi Western Dogwood, Creek Dogwood Cornus venus Venus Dogwood Corylus americana American Hazel, American Filbert Corylus avellana Common Filbert Corylus chinensis Chinese Hazel Corylus colurna Turkish Hazel Corylus cornuta var. californica Western Hazel, California Hazel, Western Beaked Hazel Corylus heterophylla Siberian Hazelnut Asian Hazel Crataegus ambigua Russian Hawthorn Crataegus autumn Crataegus autumn Crataegus columbiana Columbia Hawthorn Crataegus crus Crataegus crus Crataegus douglasii Black Hawthorn Crataegus germanica Medlar Crataegus laevigata English Hawthorn Crataegus lavallei Lavalle Hawthorn, Carrierei Hawthorn Crataegus monogyna Singleseed Hawthorn, Common Hawthorn, English Hawthorn Crataegus phaenopyrum Washington Hawthorn Crataegus punctata Dotted Hawthorn, Flat-topped Hawthorn Crataegus viridis Green Hawthorn,Southern Hawthorn Cydonia oblonga Quince Daphne genkwa Lilac Daphne Deutzia kalmiiflora Kalmia Flowered Deutzia Digitalis purpurea Common Foxglove Echinacea Coneflower Ficus carica Common Fig Ficus macrophylla Moreton Bay Fig, Australian Banyan Fothergilla gardenii Dwarf Fothergilla Fothergilla major Large Fothergilla Mountain Witchalder Frangula alnus Alder, Buckthorn Glossy Buckthorn Breaking Buckthorn (NOT Alderleaf Buckthorn (Rhramnus alnifolia) Frangula californica Coffeeberry California Coffeeberry California Buckthorn Frangula purshiana Cascara Cascara Buckthorn, Chittam Fraxinus americana White Ash, American Ash Fraxinus anomala Singleleaf Ash, Dwarf Ash Fraxinus excelsior Euopean Ash, Common Ash Fraxinus latifolia Oregon Ash Fraxinus ornus Flowering Ash Fraxinus oxycarpa Fraxinus oxycarpa Fraxinus pennsylvanica Green Ash Fraxinus quadrangulata Blue Ash Fraxinus sieboldiana Siebold Ash, Japanese Flowering Ash, Chinese Flowering Ash Gaultheria miqueliana Miquel's Spicywintergreen Miquel's Wintergreen Gaultheria mucronata Chilean Pernettya Gaultheria procumbens Wintergreen Gaultheria shallon Salal Gaultheria tetramera Si lie bai zhu (Chinese) Grevillea aquifolium Holly, Grevillea Holodiscus discolor Oceanspray Creambush, Arrowwood Holodiscus dumosus Mountain Spray, Rock-spiraea Holodiscus microphyllus Small-leaved Creambush, Small-leaved Oceanspray Rock-spiraea Hydrangea anomala var. petiolaris Climbing Hydrangea Hydrangea arborescens Hydrangea, arborescens Hydrangea macrophylla Bigleaf Hydrangea Hydrangea paniculata Panicle Hydrangea Hydrangea quercifolia Oakleaf Hydrangea Ilex aquifolium English Holly Ilex attenuata Ilex attenuata Ilex cornuta Chinese Holly, Horned Holly Ilex crenata Japanese Holly Ilex glabra Inkberry Inkberry Holly, Gallberry, Evergreen Winterberry Ilex latifolia Lusterleaf Holly Ilex meserveae Meserve Hybrid Holly Ilex paraguariensis Yerba Matá, Maté, Paraguay Tea Ilex verticillata Winterberrry Winterberry Holly, Michigan Holly, Christmas Berry Black Alder Jasminum mesnyi Primrose Jasmine Yunnan Yellow Jasmine Ligustrum japonicum Japanese Privet, Waxleaf Privet Ligustrum ovalifolium Ligustrum ovalifolium Ligustrum sinense Chinese Privet Liquidambar formosana Formosan Sweetgum Liquidambar orientalis Oriental Sweetgum Liquidambar styraciflua Sweetgum Lonicera pileata Privet, Honeysuckle Magnolia acuminata Cucumber Magnolia, Cucumbertree Magnolia, Mountain Magnolia Magnolia black Magnolia, black Magnolia butterflies Butterflies Magnolia Magnolia caerhays Magnolia, caerhays Magnolia campbellii Campbell's Magnolia, Campbell Magnolia Pink Tuliptree Magnolia denudata Yulan Magnolia Magnolia elizabeth Elizabeth Magnolia Magnolia ernestii Yellow Lily, Tree Magnolia galaxy Galaxy Magnolia Magnolia grandiflora Southern Magnolia Magnolia insignis Red Lotus Tree Magnolia kobus Kobus Magnolia Magnolia liliiflora Lily, Magnolia Magnolia loebneri Loebner Magnolia Magnolia lotungensis Eastern Joy Lotus Tree Magnolia macrophylla Bigleaf Magnolia Magnolia randy Randy Magnolia Magnolia salicifolia Willowleaf Magnolia, Anise Magnolia Magnolia sargentiana Sargent's Magnolia Magnolia sieboldii Siebold Magnolia, Oyama Magnolia Magnolia soulangiana Saucer Magnolia Magnolia star Magnolia, star Magnolia stellata Star Magnolia Magnolia sunsation Sunsation Magnolia Magnolia tripetala Umbrella Magnolia Umbrella Tree, Elkwood Magnolia virginiana Sweetbay Magnolia Malus robusta Cherry, Crabapple Menziesia ciliicalyx var. multiflora Mock Azalea, Menziesia Menziesia ferruginea Rusty Menziesia, Fool's Huckleberry, False Azalea Oxalis oregana Oregon Oxalis Redwood, Sorrel Parthenocissus quinquefolia Virginia Creeper Woodbine Parthenocissus tricuspidata Boston Ivy, Japanese Creeper Japanese Parthenocissus Paxistima myrsinites Oregon Boxwood, Mountain Lover Photinia ×fraseri Red Tip Photinia Photinia davidiana Chinese Stranvaesia Photinia davidiana var. undulata Wavy-leafed Chinese Stranvaesia Photinia glabra Japanese Photinia Photinia serratifolia Chinese Photinia Taiwanese Photinia Photinia villosa Oriental Photinia Pieris formosa var. forrestii Chinese Pieris, Himalaya Pieris Poa pratensis Kentucky Bluegrass Prunus americana Wild Plum American (Red) Plum August Plum, Goose Plum Prunus armeniaca Apricot Prunus avium Sweet Cherry Prunus besseyi Sand Cherry, Western Sand Cherry Prunus blireiana Blireiana Plum Prunus caroliniana Carolina Cherrylaurel American Cherrylaurel Prunus cascade Prunus cascade Prunus cerasifera Cherry, Plum Prunus cistena Purpleleaf Sandcherry Redleaf Sandcherry Cistena Sandcherry Cistena Plum Prunus dream Prunus dream Prunus emarginata Bitter Cherry, Wild Cherry, Quinine Cherry Prunus first Prunus first Prunus fruticosa Steppe Cherry, European Dwarf Ground Cherry, Mongolian Cherry Prunus glandulosa Dwarf Flowering Almond Prunus ilicifolia Hollyleaf Cherry, Holly-leaved Cherry Prunus laurocerasus Cherry, Laurel Prunus lusitanica Portugal Laurel Prunus maackii Amur Chokecherry Amur Cherry, Manchurian Cherry Prunus mume Japanese Apricotc Japanese Flowering Apricot Japanese Flowering Plum Prunus newport Newport Flowering Plum Prunus okame Okame Flowering Cherry Prunus padus European Birdcherry Common Birdcherry Prunus prostrata Rock Cherry, Mountain Cherry Prunus sargentii Sargent Cherry, Sargent's Cherry Prunus serotina Black Cherry, Rum Cherry Prunus serrula Birchbark Cherry, Paperbark Cherry, Tibetan Cherry Prunus serrulata Japanese Flowering Cherry Prunus snow Prunus snow Prunus subcordata Klamath Plum, Sierra Plum, Pacific Plum Prunus subhirtella Higan Cherry Prunus subhirtella var. autumnalis Autumn Flowering Higan Cherry Prunus tai Prunus tai Prunus virginiana Prunus virginiana Prunus virginiana var. demissa Western Chokecherry Prunus virginiana var. virginiana Common Chokecherry, Eastern Chokecherry Prunus yedoensis Yoshino Cherry, Somei-yoshino Cherry, Tokyo Cherry Quercus phellos Willow, Oak Quercus vaccinifolia Huckleberry, Oak Rhamnus alnifolia Alder Buckthorn, Glossy Buckthorn, Breaking Buckthorn Rhamnus purshiana Cascara Cascara Buckthorn, Chittam Rhaphiolepis indica Indian Hawthorn Rhaphiolepis majestic Rhaphiolepis majestic Rhaphiolepis umbellata Yeddo Rhaphiolepis Yeddo Hawthorn Rheum rhabarbarum Rhubarb Rhododendron 'Purple Gem' Purple Gem Rhododendron Rhododendron airy Rhododendron, airy Rhododendron alabamense Alabama Azalea Rhododendron alice Alice Rhododendron Rhododendron anah Rhododendron, anah Rhododendron anna Rhododendron, anna Rhododendron april Rhododendron, april Rhododendron arboreum subsp. cinnamomeum Cinnamon Rhododendron Rhododendron argosy Argosy Rhododendron Rhododendron augustinii Augustine Rhododendron Rhododendron auriculatum No common name (R. auriculatum) Rhododendron beauty Rhododendron, beauty Rhododendron bibiani Bibiani Rhododendron Rhododendron blue Rhododendron, blue Rhododendron boule Rhododendron, boule Rhododendron bow Rhododendron, bow Rhododendron bric Rhododendron, bric Rhododendron bureavii Bureau Rhododendron Rhododendron campylocarpum subsp. coloxanthum Coloxanthum Rhododendron Rhododendron catawbiense Catawba Rhododendron Rhododendron cheer Cheer Rhododendron Rhododendron chevalier Rhododendron, chevalier Rhododendron christmas Rhododendron, christmas Rhododendron cinnabarinum Cinnabar Rhododendron Rhododendron concinnum Concinnum Rhododendron Rhododendron cotton Rhododendron, cotton Rhododendron crater Rhododendron, crater Rhododendron crest Crest Rhododendron Rhododendron cunninghams Rhododendron, cunninghams Rhododendron cynthia Cynthia Rhododendron Rhododendron daphnoides Daphnoides Rhododendron Rhododendron dauricum Dauricum Rhododendron Rhododendron davidsonianum Davidsonianum Rhododendron Rhododendron day Rhododendron, day Rhododendron deciduous Rhododendron, deciduous Rhododendron defines Rhododendron, defines Rhododendron delaware Rhododendron, delaware Rhododendron dora Rhododendron, dora Rhododendron dreamland Dreamland Rhrododendron Rhododendron el Rhododendron, el Rhododendron elisabeth Rhododendron, elisabeth Rhododendron elizabeth Elizabeth Rhododendron Rhododendron falconeri subsp. falconeri Falconer Rhododendron Rhododendron fantastic Fantastic Rhododendron Rhododendron formosum var. formosum Formosum Rhododendron Rhododendron forrestii subsp. forrestii Forrest Rhododendron Rhododendron fortunei subsp. discolor Fortune Discolor, Discolor Rhododendron Rhododendron frilly Rhododendron, frilly Rhododendron gartendirektor Rhododendron, gartendirektor Rhododendron girards Rhododendron, girards Rhododendron goldflimmer Goldflimmer Rhododendron Rhododendron grace Rhododendron, grace Rhododendron groenlandicum Labrador-tea, Labrador Tea Rhododendron haematodes subsp. haematodes Haematodes Rhododendron Rhododendron hallelujha Hallelujah Rhododendron Rhododendron hanceanum Hanceanum Rhododendron Rhododendron hardijzer Rhododendron, hardijzer Rhododendron harry Rhododendron, harry Rhododendron hino Rhododendron, hino Rhododendron hinode Rhododendron, hinode Rhododendron hippophaeoides var. hippophaeoides Hippophaeoides Rhododendron Rhododendron hodgsonii Hodgson Rhododendron Rhododendron honourable Rhododendron, honourable Rhododendron horizon Rhododendron, horizon Rhododendron hotei Hotei Rhododendron Rhododendron irroratum Irroratum Rhododendron Rhododendron jock Jock Rhododendron Rhododendron johnstoneanum Rhododendron, johnstoneanum Rhododendron keiskei Keiskei Rhododendron, Keisuki Rhododendron Rhododendron ken Rhododendron, ken Rhododendron kiusianum Kiusianum Azalea, Kyushu Azalea Rhododendron lacteum Lacteum Rhododendron Rhododendron lees Rhododendron, lees Rhododendron lems Rhododendron, lems Rhododendron lights Rhododendron, lights Rhododendron loderi Rhododendron, loderi Rhododendron luteiflorum Luteiflorum Rhododendron Rhododendron lutescens Lutescens Rhododendron Rhododendron luteum Pontic or Pontica Azalea Rhododendron macabeanum Macabeanum Rhododendron Rhododendron macrophyllum Pacific Rhododendron Rhododendron moonstone Moonstone Rhododendron Rhododendron mrs Rhododendron, mrs Rhododendron mucronulatum Rhododendron, mucronulatum Rhododendron myrtifolium Myrtifolium Rhododendron Rhododendron niveum Niveum Rhododendron Rhododendron northern Rhododendron, northern Rhododendron occidentale Western Azalea Rhododendron orbiculare subsp. orbiculare Obiculare Rhododendron Rhododendron orchid Rhododendron, orchid Rhododendron oreotrephes Oreotrephes Rhododendron Rhododendron oudijks Rhododendron, oudijks Rhododendron pachytrichum Pachytrichum Rhododendron Rhododendron peekaboo Peekaboo Rhododendron Rhododendron pink Rhododendron, pink Rhododendron pioneer Rhododendron, pioneer Rhododendron pjm P.J.M. Rhododendron Rhododendron point Rhododendron, point Rhododendron ponticum Rhododendron, ponticum Rhododendron president Rhododendron, president Rhododendron prinophyllum Roseshell Azalea, Pinkshell Azalea Rhododendron prunifolium Plumleaf Azalea Rhododendron quinquefolium Quinquefolium Azalea Rhododendron racemosum Racemosum Rhododendron Rhododendron ramapo Ramapo Rhododendron Rhododendron rosamundi Rosamundi Rhododendron Rhododendron roseum Rhododendron, roseum Rhododendron rosy Rhododendron, rosy Rhododendron roxieanum var. oreonasters No common name Rhododendron rubiginosum Rubiginosum Rhododendron Rhododendron sappho Sappho Rhododendron Rhododendron scarlet Rhododendron, scarlet Rhododendron schlippenbachii Royal Azalea Rhododendron serpyllifolium Wild Thyme, Azalea Rhododendron serpyllifolium var. albifolrum White Wild Thyme, Azalea Rhododendron sinofalconeri Sinofalconer Rhododendron Rhododendron sinogrande Sinogrande Rhododendron Rhododendron smirnowii Smirnow Rhododendron Rhododendron snow Rhododendron, snow Rhododendron stenopetalum Rhododendron, stenopetalum Rhododendron taurus Taurus Rhododendron Rhododendron temple Rhododendron, temple Rhododendron thomsonii subsp. thomsonii Thomson Rhododendron Rhododendron tri Rhododendron, tri Rhododendron trilby Trilby Rhododendron Rhododendron unique Unique Rhododendron Rhododendron vulcan Vulcan Rhododendron Rhododendron wardii Ward Rhododendron Rhododendron white Rhododendron, white Rhododendron wiltonii Wilton Rhododendron Rhododendron winsome Winsome Rhododendron Rhododendron yakushimanum Yak Rhododendron Salix alba Salix alba Salix babylonica Weeping Willow Salix caprea Salix caprea Salix integra Salix integra Salix magnifica Magnolia-leaf Willow, Magnificent Willow Salix matsudana Salix matsudana Salix pentandra Laurel, Willow, Bay Willow Salix phlebophylla Skeletonleaf Willow Salix purpurea Purpleosier Alaska Blue Willow Salix scouleriana Scouler's Willow Sambucus canadensis American Elderberry Sambucus nigra Common Elderberry, European Elderberry, Black Elderberry, Elderflower Sambucus nigra subsp. cerulea Blue Elderberry, Blueberry, Elder Sambucus racemosa Red Elderberry Skimmia japonica Japanese Skimmia Skimmia reevesiana Reeves Skimmia Sorbus alnifolia Korean Mountain Ash, Alder, Mountain Ash Sorbus aria Whitebeam Mountain Ash Sorbus aucuparia European Mountain Ash Sorbus koehneana Chinese Mountain Ash, White-fruited Chinese Mountain Ash Sorbus poteriifolia Mountain Ash Sorbus scopulina Greene Mountain Ash, Western Mountain Ash Sorbus sitchensis Sitka Mountain Ash, Pacific Mountain Ash, Western Mountain Ash Sorbus yunan Sorbus yunan (no English common name) Spiraea betulifolia Birch-leaf Spirea, Shiny-leaf Spirea, White Spirea Spiraea densiflora Rose, Meadowsweet, Mountain Spirea, Subalpine Spirea Spiraea double Spiraea, double Spiraea douglasii Rose, Spirea Spiraea fritschiana Korean Spirea Spiraea japonica Japanese Spirea Spiraea japonica var. alpina Daphne, Spirea Spiraea miyabei Miyabe Spirea Spiraea nipponica Nippon Spirea Spiraea prunifolia Spiraea, prunifolia Spiraea splendens Mountain Spirea, Rose Meadowsweet, Subalpine Spirea Spiraea thunbergii Thunberg Spirea Spiraea vanhouttei Van Houtte Spirea, Bridal Wreath Spirea Symphoricarpos albus Common Snowberry Symphoricarpos doorenbosii Doorenbos Snowberry, Doorenbos Coralberry Symphoricarpos mollis Spreading Snowberry, Creeping Snowberry, Mountain Snowberry Symphoricarpos orbiculatus Indiancurrant Coralberry Buckbrush Symphoricarpos rotondifolius Roundleaf Snowberry, Huckleberry-flowered Snowberry Syringa chinensis Chinese Lilac Rouen Lilac Syringa hyacinthiflora Early Flowering Lilac, Early Hybrid Lilac Syringa josikaea Hungarian Lilac Syringa laciniata Cutleaf Lilac Syringa meyeri Syringa meyeri Syringa microphylla Syringa microphylla Syringa patula Syringa patula Syringa pekinensis Peking Lilac Chinese Tree, Lilac Syringa prestoniae Preston Lilac, Canadian Lilac Syringa reticulata Japanese Tree Lilac, Giant Tree Lilac Syringa vulgaris Common Lilac Ternstroemia gymnanthera Japanese Ternstroemia, False Japanese Cleyera Trifolium tridentatum Tomcat Clover Vaccinium angustifolium Lowbush Blueberry Vaccinium corymbosum Highbush Blueberry Vaccinium crassifolium Creeping Blueberry, Thick-leaved Whortlberry Vaccinium macrocarpon Cranberry American Cranberry Vaccinium membranaceum Big Huckleberry, Mountain Huckleberry Thinleaf Huckleberry Vaccinium moupinense Himalayan Blueberry Vaccinium ovalifolium Oval-leaf Blueberry Vaccinium ovatum Box Huckleberry, Evergreen Huckleberry Vaccinium parvifolium Red Huckleberry, Red Whortleberry Vaccinium sikkimense Sikkim Blueberry Vaccinium uliginosum Bog Blueberry, Bog Bilberry Vaccinium vitis Vaccinium vitis Viburnum awabuki Sweet Viburnum Viburnum bodnantense Viburnum, bodnantense Viburnum bracteatum Bracted Viburnum, Limerock Arrowwood Viburnum Viburnum burkwoodii Burkwood Viburnum Viburnum carlesii Koreanspice Viburnum Viburnum cassinoides Witherod Viburnum, Northern Wild Raisin Viburnum davidii David's Viburnum Viburnum dentatum Arrowwood Viburnum Viburnum dilatatum Linden, Viburnum, Linden, Arrowwood Viburnum edule Mooseberry Highbush Cranberry, Moosewood Viburnum, Squashberry Viburnum farreri Fragrant Viburnum Viburnum juddii Judd Viburnum Viburnum lantana Wayfaringtree Viburnum Viburnum lantanoides Hobblebush Viburnum lentago Nannyberry Sheepberry Viburnum nudum Possumhaw Smooth Witherod Northern Wild Raisin Viburnum opulus var. americanum American Cranberrybush Viburnum Viburnum opulus var. opulus European Cranberrybush Viburnum, Guelder-rose Viburnum opulus var. sargentii Sargent Viburnum Viburnum plicatum var. plicatum Japanese Snowball Viburnum Viburnum plicatum var. tomentosum Doublefile Viburnum Viburnum pragense Prague Viburnum Viburnum prunifolium Blackhaw Viburnum Viburnum rafinesquianum Downy Arrowwood Viburnum, Rafinesque Viburnum Viburnum rhytidophyllum Leatherleaf Viburnum Viburnum rufidulum Rusty Blackhaw Viburnum, Southern Blackhaw Viburnum setigerum Tea Viburnum Viburnum suspensum Sandankwa Viburnum, Sandanqua Viburnum Viburnum tinus Laurustinus Viburnum trilobum American Cranberrybush Viburnum Viola Hookedspur Violet Yucca brevifolia Joshua Tree Yucca elata Soaptree Yuca Yucca filamentosa Adam's Needle Yucca Yucca glauca Small Soapweed Soapwell Beargrass Great Plains Yucca Yucca recurvifolia Pendulous Yucca, Curve-leaf Yucca Yucca rostrata Big Bend Yucca, Beaked Yucca Yucca treculeana Spanish Bayonet, Spanish Dagger, Don Quixote's Lance, Palma Pita