Plant Hosts of Phytphthora ramorum

The following plants are all hosts of the sudden oak death pathogen. Under normal conditions, P. ramorum does not kill most of these plants, with the exception of oak species and tanoak. Infected plants will display some sign of blight on leaves.  These plants have potential to carry the disease, take care when gathering or moving these plants, including purchase from a nursery. 

Native Plant Hosts

Trees
Bigleaf maple (Acer macrophyllum)
Black oak (Quercus kelloggii)
California bay laurel/Oregon myrtle (Umbellularia californica)
California buckeye (Aesculus californica)
California nutmeg (Torreya californica)
Canyon live oak (Quercus chrysolepis)
Coast live oak (Quercus agrifolia)
Coast redwood (Sequoia  sempervirens)
Douglas-fir (Pseudotsuga menziesii)
Grand fir (Abies grandis)
White fir (Abies concolor)
Red fir (Abies magnifica)
Madrone (Arbutus menziesii)
Oregon Ash (Fraxinus latifolia)
Pacific yew (Taxus brevifolia)
Shreve's oak (Quercus parvula var. Shrevei)
Tanoak (Notholithocarpus densiflorus)
Herbs
Bead lily (Clintonia andrewsiana)
False Solomon's seal (Maianthemum racemosum)
Western starflower (Trientalis latifolia)
Ferns
California maidenhair fern (Adiantum jordanii)
Western maidenhair fern (Adiantum aleuticum)
Wood fern (Dryopteris arguta)
Shrubs
Azalea (Rhododendron occidentale)
Blueblossom (Ceanothus thyrsiflorus)
California coffeeberry (Rhamnus californica)
California hazelnut (Corylus cornuta)
California rhododendron (Rhododendron macrophyllum)
California honeysuckle (Lonicera hispidula)
Cascara (Rhamnus purshiana)
Evergreen huckleberry (Vaccinium ovatum)
Manzanita (Arctostaphylos manzanita, A. columbiana)
Kinnikinnick, bearberry (Arctostaphylos uva-ursi)
Labrador tea (Rhododendron columbianum)
Oregon grape (Berberis nervosa)
Poison-oak (Toxicodendron diversilobum)
Rhododendron (Rhododendron macrophyllum)
Salal (Gaultheria shallon)
Salmonberry (Rubus spectabilis)
Silktassle (Garrya elliptica)
Spicebush (Calycanthus occidentalis)
Toyon (Heteromeles arbutifolia)
Vine maple (Acer circinatum)
Wood rose (Rosa gymnocarpa)

Non-native, Ornamental and Horticultural Plant Hosts

Bilberry (Vaccinium myrtilus)
Camellia (various species and varieties)
Camphor tree (Cinnamomum camphora)
Cherry laurel (Prunus lusitanica, P. laurocerasus)
Chinese redbud (Cercis chinensis
Daphniphyllum glaucescens 
Drooping leucothoe (Leucothoe fontanesiana)
Euonymus kiautschovicus
European ash (Fraxinus excelsior)
European beech (Fagus sylvatica)
European yew (Taxus baccata)
Evergreen currant (Ribes laurifolium)
Evergreen Maple (Acer laevigatum)
Firethorn (Pyracantha koidzumii)
Goat willow (Salix caprea)
Griselinia (Grisselinia littoralis)
Holly (Ilex aquifolium, I. cornuta, I. purpurea)
Horsechestnut (Aesculus hippocastanum)
Japanese ardisia (Ardisia japonica)
Japanese Larch (Larix kaempferi)
Japanese oak (Lithocarpus glaber)
Kousa dogwood (Cornus kousa
Lilac (Syringa vulgaris)
Lingonberry (Vaccinium vitis-idaea)
Loropetalum chinense
Magnolia (various species)
Mexican orange(Choisya ternate)
Mountain-laurel (Kalmia latifolia)
Myrtle-leafed Distylium  (Distylium myricoides) 
Ninebark (Physocarpus opulifolius)
Oleander (Nerium oleander)
Persian ironwood (Parrotia persica)
Pieris (various species and varieties)
Photinia, red tip (Photinia fraseri)
Red lotus tree (Manglietia insignis)
Rhododendron (all species, hybrids and cultivars)
Roble beech (Nothofagus obliqua)
Rose (specific cultivars and hybrids)
Rugosa rose (Rosa rugosa)
Scotch heather (Calluna vulgaris)
Scribbly gum (Eucalyptus haemastoma)
Spike witch hazel (Corylopsis spicata)
Strawberry tree (Arbutus unedo)
Striped bark maple (Acer davidii
Sweet chestnut (Castanea sativa)
Sweet Cicely (Osmorhiza berteroi)
Star jasmine (Trachelospermum jasminoides)
Sycamore maple (Acer pseudoplatanus)
Tea olive (Osmanthus decorus, O. delavayi, O. fragrans, O.heterophyllus)
Viburnum (various species and varieties) 
Victorian box (Pittosporum undulatum)
Wintergreen (Gaultheria procumbens)
Winter's bark (Drimys winteri)
Witch hazel (Hamamelis virginiana)
Yew (Taxus x media)
Various oak species of eastern U.S. and European origin