Root weevil
Otiorhynchus spp.
460 host plants
Last updated
Data Coverage 4 of 6 dimensions
The Douglas-fir twig weevil attacks a wide range of hosts, with gray-black adult weevils about 4-5mm long causing mild foliar feeding and creating small shot-like holes. Larvae cause most obvious injury by killing terminal and lateral branches, often resulting in forked tops and distorted branch architecture.
Serious for Christmas tree growers since girdled twigs make trees unmarketable. Keep trees healthy and avoid stress. Remove infested twigs on young trees. For commercial production, monitor terminals in spring and remove affected growth. Maintain vigor through proper irrigation.
Quick Reference
Order
Coleoptera
Type
root-feeder
Host Plants
460
Peak Activity
May-June: Adult emergence and foliar feeding (leaf notching visible). June-Au...
Monitoring & Action
How to Monitor
Night inspection with flashlight: Look for adults on foliage May-July, particularly at plant bases. Leaf notching is the visible signal. Dig root zone Feb-March to confirm larval presence (C-shaped white larvae). Threshold: 25+ larvae per sq ft in soil warrants treatment. Check container plants by tipping out and inspecting root ball for larvae.
When to Act
Adult leaf notching is cosmetic on established plants. Larval root feeding is the primary economic damage. Threshold: 25+ larvae per sq ft in root zone soil. Young plants (1-3 years) and container stock are most vulnerable to root damage. Established landscape plants (5+ years) tolerate moderate larval populations without visible decline.
What Damage Looks Like
Larval root feeding is the primary economic damage: causes plant decline, wilting, reduced vigor, and death in severe infestations. Particularly damaging to container nursery stock, rhododendrons, yew, and strawberries where root volume is limited. Adult foliar feeding produces distinctive crescent-shaped notches along leaf margins, which is cosmetic on most ornamentals but can reduce photosynthetic capacity on heavily defoliated plants. Larvae also girdle the root crown of small plants.
Cultural Controls
- Reduce mulch depth to 2 inches around plant crowns and pull back 6 inches from plant base. Deep mulch provides shelter for adults during day. Shallow mulch forces adults to shelter deeper, reducing emergence and feeding likelihood.
- Night hand-picking: Walk garden with flashlight May-June, hand-pick adults off foliage, drop into soapy water. Remove egg-laying females before reproduction. Practical on small shrubs; labor-intensive on large plants. Reduces populations moderately.
Regional Notes
Among the most common landscape pests in the Puget Sound region. All three species are well-established. Rhododendrons are the most frequently affected ornamental host in residential landscapes. Maritime soil moisture conditions favor entomopathogenic nematode (H. bacteriophora) efficacy; sustained soil moisture through fall allows nematode survival and reproduction, making biological control more reliable here than in drier climates. Larvae feed through mild winters without a hard dormancy break. Black vine weevil (O. sulcatus) is the dominant species in nursery and landscape settings.
Host Plants (460)
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 Andromeda polifolia Bog Rosemary 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 Buddleja davidii Butterfly Bush 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 ann Cistus ann Cistus corbariensis White Rockrose Cistus crispatus Cistus crispatus Cistus dansereaui Cistus dansereaui Cistus doris Cistus doris Cistus elma Elma Rockrose Cistus florentinus Cistus florentinus Cistus grayswood Cistus grayswood Cistus hybridus White Rockrose Cistus ladanifer Common Gum, Rockrose Cistus oblongifolius Oblongifolius Rockrose Cistus pulverulentus Cistus pulverulentus Cistus purpureus Orchid Rockrose Cistus snow Cistus snow Cistus victor Cistus victor Cornus capitata Evergreen Dogwood, Bentham's Cornel, Himalayan Strawberry Tree Daphne cneorum Garland Daphne, Rock Daphne, Rose Daphne Daphne genkwa Lilac Daphne Euonymus alatus Euonymus alatus Euonymus americanus American Euonymus, Hearts-a-Burstin', Strawberry Bush Euonymus atropurpureus Eastern Wahoo Euonymus europaeus Common Spindle Tree, European Euonymus Euonymus fortunei Wintercreeper Euonymus, Wintercreeper Euonymus japonicus Japanese Spindle Euonymus kiautschovicus Euonymus kiautschovicus Forsythia viridissima Greenstem Forsythia Fragaria chiloensis Beach Strawberry Sand Strawberry, Chilean Strawberry Fuchsia magellanica Magellan Fuchsia, Hardy Fuchsia Grevillea aquifolium Holly, Grevillea Hamamelis ×intermedia Hybrid Witch Hazel Hamamelis vernalis Vernal Witchhazel, Ozark Witchhazel Hamamelis virginiana Common Witchhazel Hedera canariensis Canary Island Ivy, Canarian Ivy, Algerian Ivy Hedera helix English Ivy Hibiscus syriacus Rose, of Sharon Shrub, Althea 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 Juniperus californica California Juniper, California White Cedar, Desert White Cedar Juniperus cedrus Canary Island Juniper Juniperus chinensis Chinese Juniper Juniperus communis Common Juniper Juniperus conferta Juniperus conferta Juniperus deppeana Alligator Juniper, Checkered-bark Juniper Juniperus formosana Formosan Juniper Juniperus grey Juniperus grey Juniperus horizontalis Creeping Juniper Juniperus monosperma Oneseed Juniper Juniperus occidentalis Western Juniper Juniperus osteosperma Utah Juniper Juniperus pingii Ping Juniper Juniperus procumbens Japanese Garden Juniper, Bonin Island Juniper, Ibuki Juniper Juniperus rigida Temple Juniper, Needle Juniper Juniperus rigida subsp. conferta Shore Juniper Juniperus sabina Savin Juniper Juniperus scopulorum Rocky Mountain Juniper Juniperus squamata Singleseed Juniper, Flaky Juniper, gao shan bai Juniperus virginiana Eastern Redcedar Pencil Cedar Kerria japonica Japanese Kerria Japanese Rose Menziesia ciliicalyx var. multiflora Mock Azalea, Menziesia Menziesia ferruginea Rusty Menziesia, Fool's Huckleberry, False Azalea Microcachrys tetragona Creeping Pine, Creeping Strawberry Pine 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 Pieris japonica Japanese Pieris Pinus albicaulis Whitebark Pine, Scrub Pine, White Pine Pinus aristata Bristlecone Pine, Rocky Mountain Bristlecone Interior Bristlecone Pinus attenuata Knobcone Pine Pinus banksiana Jack Pine, Scrub Pine, Banksian Pine, Hudson Bay Pine Pinus bungeana Lacebark Pine, Whitebark Pine, Baipi Song Pinus canariensis Canary Island Pine Pinus cembra Swiss Stone Pine Pinus contorta Lodgepole Pine Pinus contorta var. contorta Shore Pine Pinus contorta var. latifolia Rocky Mountain Lodgepole Pine Pinus coulteri Coulter Pine, Bigcone Pine Pinus densiflora Japanese Red Pine Pinus edulis Pinyon Pine, Piñón Pine, Two-needle Pinyon Colorado Pinyon Pinus elliottii Slash Pine, Swamp Pine Pinus flexilis Limber Pine, Rocky Mountain White Pine Pinus halepensis Aleppo Pine, Jerusalem Pine Pinus heldreichii Bosnian Pine, Snakeskin Pine Pinus jeffreyi Jeffrey Pine, Western Yellow Pine, Bull Pine Pinus kwangtungensis Kwangtung Pine, Guangdong Pine Pinus lambertiana Sugar Pine Pinus leucodermis Bosnian Pine Pinus monophylla Singleleaf Pinon Pine, One-leaved Pine Pinus monticola Western White Pine Pinus mugo Mugo Pine Pinus mugo var. pumilio Mugo pine, Dwarf Mugo pine Pinus nigra Austrian Pine Pinus parviflora Japanese White Pine Pinus parvifola Pinus parvifola Pinus pinaster Maritime Pine, Cluster Pine, Turpentine Pine Pinus pinea Italian Stone Pine, Umbrella Pine Pinus ponderosa Ponderosa Pine, Western Yellow Pine Pinus pumila Japanese Stone Pine, Dwarf Siberian Pine Pinus radiata Monterey Pine Pinus resinosa Red Pine Pinus sabiniana Gray Pine, Foothill Pine Pinus strobiformis Southwestern White Pine, Mexican White Pine, Chihuahua White Pine Pinus strobus Eastern White Pine Pinus sylvestris Scots Pine, Scotch Pine Pinus thunbergii Japanese Black Pine Pinus virginiana Virginia Pine, Scrub Pine, Jersey Pine Pinus wallichiana Himalayan Pine, Bhutan Pine Pinus yunnanensis Yunnan Pine 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 Pyracantha coccinea Firethorn Pyracantha koidzumii Formosan Firethorn 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 Rosa acicularis Wild Prickly Rose Rosa gymnocarpa Little Wood Rose, Wood Rose, Baldhip Rose Rosa multiflora Multiflora Rose Rosa nutkana Nootka Rose Rosa pisocarpa Clustered Rose, Swap Rose Rosa rubiginosa Sweetbriar Rose, Eglantine Rose Rosa rugosa Rugosa Rose, Beach Tomato, Sea Tomato Rosa woodsii Woods' Rose Rubus calycinoides Crinkle-leaf Creeper Creeping Raspberry Yü-shan raspberry Rubus leucodermis Blackcap, Western Raspberry Rubus odoratus Flowering Raspberry Purple-flowering Raspberry Rubus tricolor Creeping Bramble Korean Raspberry 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 densiflora Rose, Meadowsweet, Mountain Spirea, Subalpine Spirea Spiraea douglasii Rose, Spirea 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 Taxus baccata English Yew Taxus brevifolia Pacific Yew Taxus canadensis Canadian Yew, American Yew, Ground Hemlock Taxus cuspidata Japanese Yew Taxus media Hybrid Yew, Anglojapanese Yew Thuja occidentalis Eastern Arborvitae, American Arborvitae Eastern White-cedar Thuja orientalis Chinese Arborvitae, Oriental Arborvitae Thuja plicata Western Redcedar Tsuga canadensis Canadian Hemlock, Eastern Hemlock Tsuga canadensis var. pendula Weeping Hemlock Tsuga diversifolia Northern Japanese Hemlock Tsuga heterophylla Western Hemlock Tsuga mertensiana Mountain Hemlock 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 cinnamomifolium Cinnamon Viburnum Viburnum davidii David's Viburnum Viburnum dentatum Arrowwood Viburnum Viburnum dilatatum Linden, Viburnum, Linden, Arrowwood Viburnum edule Mooseberry Highbush Cranberry, Moosewood Viburnum, Squashberry Viburnum ellipticum Oregon Viburnum, Western Wayfaring Tree 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 Waldsteinia fragarioides Barren Strawberry