Greer Laboratories Pollination Zone Map - Click on map to select zone and search plants
List of the most common allergenic plants - Scientific name (Common names)

Click on plant name to see details

Abelmoschus esculentus (Okra)

Abies concolor (White fir)

Abies procera (Noble fir)

Acacia baileyana (Golden acacia, Cootamundra wattle)

Acacia dealbata (Mimosa, Silver wattle)

Acacia farnesiana (Sweet acacia, Mealy wattle)

Acacia longifolia (Acacia, Sydney golden wattle)

Acalypha spp (Chenille plant, Three-seeded Mercury)

Acer macrophyllum (Big leaf maple)

Acer negundo (Box elder, Ash leaf maple)

Acer platanoides (Norway maple)

Acer rubrum (Red maple)

Acer saccharinum (Silver maple)

Acer saccharum (Sugar maple)

Aconitum napellus (Monk's hood)

Actaea alba (Baneberry, Doll's-eyes, Necklace weed)

Aesculus flava (Yellow buckeye)

Aesculus hippocastanum (Horse chestnut)

Agave americana (Century plant, Sisal)

Aglaonema (Chinese evergreen)

Agropyron ()

Agropyron cristatum (Crested wheatgrass)

Agropyron desertorum (Clustered wheatgrass)

Agrostis ()

Agrostis capillaris (Colonial bentgrass)

Agrostis gigantea (Black bentgrass)

Agrostis stolonifera (Redtop, creeping bentgrass)

Ailanthus altissima (Tree-of-heaven)

Albizia julibrissin (Mimosa, Silk tree )

Albizia lebbek (Woman's tongue)

Alcea rosea (Hollyhock)

Aleurites moluccana moluccana (Candlenut)

Allamanda cathartica (Yellow allamanda)

Allamanda schottii (Purple allamanda)

Allenrolfea occidentalis (Iodine bush, burrobush)

Allium (Onion, garlic, leek, shallot)

Alnus glutinosa (European alder)

Alnus incana (Speckled alder)

Alnus rhombifolia (White alder)

Alnus rubra (Red alder)

Alnus serrulata (Brookside alder, Hazel alder)

Alnus viridis (Sitka or Mountain alder)

Alocasia macrorrhiza (Giant elephant ear, taro)

Alocasia odora (Giant elephant ear, taro)

Aloe arborescens (Tree aloe)

Alopecurus pratensis (Field meadow foxtail)

Alstroemeria ligtu (Inca lily, Parrot flower)

Amaranthus (Pigweeds, tumbleweeds, waterhemp)

Amaranthus albus (Tumbleweed)

Amaranthus blitoides (Mat amaranth)

Amaranthus hybridus (Careless weed, Smooth amaranth)

Amaranthus palmeri (Palmer's amaranth)

Amaranthus retroflexus (Pigweed, Redroot/Rough amaranth)

Amaranthus rudis (Tall amaranth, western waterhemp)

Amaranthus spinosus (Pigweed, Spiny amaranth)

Amaranthus tuberculatus (Western waterhemp, Rough fruit amaranth)

Amaranthus viridis (Slender amaranth)

Ambrosia acanthicarpa (Flat-spine burr ragweed, false ragweed)

Ambrosia ambrosioides (Ambrosia leaf, Burr ragweed, Canyon ragweed)

Ambrosia artemisiifolia (Annual ragweed,common ragweed, short ragweed)

Ambrosia bidentata (Lance-leaf ragweed, Southern ragweed)

Ambrosia chamissonis (Silver burr ragweed)

Ambrosia confertiflora (Weak leaf, Burr ragweed, Slender ragweed)

Ambrosia deltoidea (Triangle burr ragweed, Rabbit bush)

Ambrosia dumosa (Desert ragweed, White burrobush)

Ambrosia hispida (Coastal ragweed)

Ambrosia psilostachya (Perennial ragweed, Western ragweed )

Ambrosia tomentosa (Bursage, Skeleton leaf burr ragweed)

Ambrosia trifida (Giant ragweed)

Amorphophallus (Voodoo lilies, snake lilies)

Ampelopsis arborea (Pepper vine)

Amphiachyris dracunculoides (Broomweed)

Anacardium occidentale (Cashew)

Anagallis arvensis (Scarlet pimpernel)

Ananas comosus (Pineapple)

Andropogon virginicus (Virginia beardgrass, Broom sedge)

Anemone caroliniana (Pasque-flower, Wind flower)

Anethum graveolens (Dill)

Angadenia berteroi (Pineland allamanda)

Angelica (Angelica)

Annona reticulata (Custard apple)

Anthemis arvensis (Stinking chamomile, dog fennel)

Anthemis cotula (Dog fennel, Stinking chamomile)

Anthoxanthum odoratum (Large sweet vernalgrass)

Anthurium (Flamingo flower, anthurium)

Apium graveolens (Celery)

Aralia spinosa (Devil's walking stick, Prickly ash, Hercules' club)

Arenga (Sugar palms)

Argemone mexicana (Mexican poppy)

Arisaema dracontium (Green dragon)

Arisaema triphyllum (Jack-in-the-pulpit)

Arrhenatherum elatius (Tall oatgrass)

Artemisia ()

Artemisia absinthium (Wormwood (absinthe), Oldman)

Artemisia annua (Annual wormwood)

Artemisia californica (Coastal sagebrush)

Artemisia campestris (Sagewort, wormwood)

Artemisia dracunculus (Green sage, Dragon wormwood, )

Artemisia frigida (Pasture sage, Prairie sagebrush)

Artemisia ludoviciana (White sage)

Artemisia pycnocephala (Sanddune sagebrush)

Artemisia tridentata (Big sagebrush, Giant sagebrush, Common sagebrush)

Artemisia vulgaris (Mugwort, Common Wormwood)

Asarum canadense (Wild ginger)

Asclepias curassavica (Milkweed)

Asimina triloba (Pawpaw)

Asparagus officinalis (Asparagus)

Atriplex argentea (Silverscale)

Atriplex canescens (Wingscale, Four wing saltbush)

Atriplex confertifolia (Shadscale)

Atriplex lentiformis (Lenscale, Quailbush)

Atriplex patula (Halberd leaf orache, Common Orache)

Atriplex polycarpa (Allscale, Cattle spinach)

Atriplex rosea (Red scale, Tumbling orache)

Atriplex serenana (Scale saltbush, Bracted saltbush)

Atriplex watsonii (Coast saltbush)

Atriplex wrightii (Wright's saltbush, Annual saltbush)

Atropa belladonna (Belladonna)

Avena fatua (Wild oat, Common Oat )

Avena sativa (Cultivated oat)

Axyris amaranthoides (Russian pigweed )

Baccharis angustifolia = B. neglecta (False-willow, Baccharis, Silverling)

Baccharis glomeruliflora (Baccharis, Silverling)

Baccharis halimifolia (Consumption weed, Sea-myrtle, Groundseltree)

Baccharis halimifolia (Groundsel tree, Cotton-seed tree, Silverling, Baccharis)

Baccharis salicifolia (Mule's fat)

Balsamorhiza sagittata (Arrow leaf balsamroot)

Bassia hyssopifolia (Smotherweed (Bassia))

Bassia scoparia (Burning bush, firebush)

Begonia spp, (Begonias)

Berthollettia excelsa (Brazil nut)

Beta vulgaris (Sugar beet, Sea beet)

Betula alleghaniensis (Yellow birch)

Betula lenta (Sweet birch, cherry)

Betula nigra (River birch, Red birch)

Betula occidentalis (Water birch)

Betula papyrifera (Paper birch)

Betula pendula (European weeping birch, European white birch)

Betula populifolia (Gray birch, White birch)

Blighia sapida (Ackee, Akee)

Boehmeria cylindrica (Boghemp, Small-spike false nettle)

Bouteloua gracilis (Blue grama)

Brassica (Mustard, Cabbage (inc. brocolli, Brussels sprouts, cauliflower), Rape)

Brassica campestris (rapa) (Mustard)

Brassica napus (Rapa, Turnip)

Brassica nigra (Black mustard)

Bromus (Brome grasses)

Bromus inermis (Smooth brome)

Bromus secalinus (Rye brome, Cheat brome)

Broussonetia papyrifera (Paper mulberry)

Brugmansia (Angel trumpet, Datura)

Buchloe dactyloides (Buffalograss)

Buxus sempervirens (Boxwood)

Caladium bicolor (Caladium)

Callistemon citrinus (Bottlebrushes)

Callistemon spp. (Bottlebrushes)

Calocedrus decurrens (Incense cedar)

Calophyllum inophyllum (Mast wood)

Calotropis gigantea (Giant milkweed)

Campanula (Canterbury bells, campanula, bluebells, harebells)

Campsis radicans (Trumpet vine)

Cananga odorata (Ylang-ylang)

Cannabis sativa (Western water hemp)

Capsicum (Red peppers, Chili peppers, Hot peppers)

Carex (Sedges)

Carex aquatilis (Leafy tussock sedge)

Carex barbarae (Santa Barbara sedge)

Carica papaya (Papaya)

Carpentaria acuminata (Carpenter palm)

Carpinus betulus (European hornbeam)

Carpinus caroliniana (American hornbeam, Musclewood, Blue beech)

Carya alba (Mockernut hickory,white hickory)

Carya aquatica (Water hickory)

Carya cordiformis (Bitter nut hickory)

Carya glabra (Pignut hickory)

Carya illinoinensis (Pecan)

Carya laciniosa (Shell bark hickory)

Carya ovata (Shag bark hickory)

Carya spp. ()

Carya texana (Black hickory)

Caryota (Fishtail palm)

Cassia alata = Senna alata (Candle-bush, Cure-all, Ringworm cassia)

Cassia bicapsularis = Senna bicapsularis (Christmas senna)

Cassia fasciculata (Partridge-pea)

Cassia fistula (Golden shower, Indian laburnum, Midas tree, Pudding pipe tree, Purging cassia, Shower-of-gold, Sweet-bark)

Cassia marylandica (marilandica) (American senna, Locust plant, Maryland cassia, Wild senna)

Cassia obtusifolia = Senna obtusifolia (Coffee-pod, Sicklepod)

Cassia occidentalis = Senna occidentalis (Coffee senna, Coffee-weed, Florida-coffee, Styptic-weed, Wild-coffee)

Cassia siamea = Senna Siamea (Kassod tree, Siamese shower, Siamese senna)

Cassia spp (Shower tree, Senna, Shower, Candle-bush, cure-all, Ringworm cassia, Christmas senna, Partridge-pea, Golden shower, Indian labornum, Midas tree, Pudding pipe tree, Purging cassia, Shower-of-gold, Sweet bark, American senna, Locust plant, Maryland senna, Wild senna, Coffee-pod, Sicklepod, Coffee senna, Coffee-weed, Florida-coffee, Styptic-weed, Wild-coffee, Kassod tree, Siamese shower, Siamese senna)

Castanea sativa (Spanish chestnut, Sweet chestnut)

Casuarina (Australian pine, Beefwood, She-oak)

Casuarina equisetifolia (Australian pine, Beefwood, Beach She-oak)

Catalpa bignonioides (Bean tree, Southern catalpa, Candle tree)

Caulophyllum thalictroides (Blue cohosh, Papooseroot)

Cedrus deodara (Deodar cedar)

Celtis (Hackberry, sugarberry)

Celtis australis (Southern nettletree, Mediterranean hackberry)

Celtis laevigata (Sugarberry, Hackberry)

Celtis occidentalis (Common Hackberry)

Centaurea maculosa (Knapweed)

Ceratonia siliqua (Carob (algarroba), St. John's bread)

Cercidium ()

Cestrum nocturnum (Night blooming jessamine)

Chamaecyparis lawsoniana (Port Orford cedar, Lawson's cypress)

Chamaecyparis nootkatensis (Alaska cedar)

Chamaecyparis obtusa (Hinoki white cypress)

Chamaecyparis thyoides (Atlantic white cedar)

Chamaedorea (Parlor palm, Bamboo palm, Reed palm)

Chamaenerion angustifolium (Fireweed)

Chamaerops humilis (Palm, Dwarf)

Chamaesyce hirta (Spurge)

Chamaesyce hyssopifolia (Spurge)

Chelidonium majus (Celandine)

Chenopodium album (Lamb's quarters)

Chenopodium ambrosioides (Mexican tea)

Chenopodium berlandieri (Pit seed goosefoot)

Chenopodium botrys (Jerusalem oak)

Chimaphila umbellata (Prince's pine, Pipsissewa)

Chionanthus virginicus (Fringe tree, Old man's beard)

Chrysanthemum (Chrysanthemum, Crown daisy, Corn marigold)

Chrysanthemum leucanthemum (Daisy, Ox-Eye)

Chrysanthemum x morifolium (Florist's chrysanthemum)

Chrysothamnus viscidiflorus (Douglas rabbitbush, Green rabbitbrush)

Cichorium intybus (Chicory)

Cinnamomum camphora (Camphor tree)

Citrus (Citrus trees (orange, lemon, lime, grapefruit, etc.))

Citrus sinensis (Sweet orange)

Clematis spp. and hybrids (Virgin's bower)

Cleome spinosa (Spider flower)

Cnidoscolus stimulosus (Spurge nettle, Bull nettle, Stinging nettle)

Cocos nucifera (Coconut palm)

Codiaeum variegatum (Croton)

Colocasia esculenta (Taro, Elephant ear, Dasheen)

Comptonia peregrina (Sweet fern)

Conium maculatum (Poison hemlock)

Conyza canadensis (Butterweed, horseweed)

Coriandrum sativum (Coriander)

Cortaderia selloana (Uruguayan pampasgrass)

Corylus americana (American hazelnut)

Corylus cornuta (Beaked hazelnut)

Cosmos bipinnatus (Garden cosmos)

Crataegus crus-galli (Cockspur hawthorn)

Croton (Crotons)

Cryptomeria japonica (Japanese cedar)

Cryptostegia grandiflora (Palay rubbervine,Pink allamanda)

Cryptostegia madagascariensis (Madagascar rubbervine, Purple allamanda)

Cupressus arizonica (Arizona cypress)

Cupressus macrocarpa (Monterey cypress)

Cupressus sempervirens (Italian cypress)

Cycas (Sago palms)

Cymbidium (Cymbidium orchids)

Cymbopogon citratus (Lemongrass)

Cynodon dactylon (Bermudagrass)

Cynoglossum (Hound's tongue, Wild comfrey)

Cyperus (Sedges, papyrus)

Cyperus esculentus (Yellow nut sedge, chufa)

Cypripedium (Lady slipper orchids, Moccasin flower)

Cytisus scoparius (Scotch broom)

Dactylis glomerata (Orchardgrass)

Dalbergia ()

Daphne (Daphne)

Datura metel (Thorn apple, Datura)

Datura stramonium (Jimson weed, Thorn apple, Datura)

Daucus carota (Wild carrot, Queen Anne's lace)

Delphinium (Larkspur, Staggerweed)

Dianthus caryophyllus (Carnation)

Dicentra (Bleeding heart)

Dicoria canescens (Silver ragweed)

Dictamnus albus (Gas plant, Dittany, Burning bush)

Dieffenbachia spp. and hybrids (Dumb-cane)

Digitaria (Crabgrass)

Dioscorea (Yams)

Dirca palustris (Leather bark, Wicopy, Swamp wood)

Distichlis spicata (Coastal saltgrass)

Echium plantagineum (Paterson's curse, Salvation Jane)

Elaeagnus angustifolia (Russian olive)

Elymus ()

Elymus repens (Quack grass, Couch grass)

Epipremnum aureum (Pothos)

Equistetum hyemale (Horsetail, Scouring-rush)

Erythrina herbacea (Cardinal spear, Cherokee bean, Eastern Coral bean, Snakeweed)

Erythrina poeppigiana (Mountain immortelle)

Erythrina variegata (Coral tree, Lenten tree, Tiger's claw)

Eschscholtzia californica (California poppy)

Eucalyptus (Gum trees)

Eucalyptus globulus (Tasmanian blue gum)

Eupatorium capillifolium (Dog fennel)

Euphorbia (Spurges, Milk cacti)

Euphorbia cotinifolia (Red Spurge )

Euphorbia cyathophora (Painted leaf)

Euphorbia fulgens (Scarlet plume)

Euphorbia heterophylla (Painted leaf)

Euphorbia lactea (Milky spurge, Spurge cactus, Candelabra cactus, Brain cactus (var. cristata))

Euphorbia milii (Crown-of-thorns)

Euphorbia pulcherrima (Poinsettia)

Euphorbia tirucalli (Pencil tree, Milk bush, Spurge tree)

Evonymus spp (Burning bush, Strawberry bush, Hearts-a-bustin', Spindle tree, Wahoo)

Fagopyrum esculentum (Buckwheat)

Fagus grandifolia (American beech)

Fagus sylvatica (European beech)

Festuca elatior (Meadow Fescue)

Festuca rubra (Red fescue)

Ficus benjamina (Weeping banyan, Weeping fig)

Ficus carica (Edible fig)

Ficus pumila (Creeping fig)

Foeniculum vulgare (Fennel)

Fraxinus americana (White ash)

Fraxinus excelsior (European ash)

Fraxinus latifolia (Oregon ash)

Fraxinus nigra (Black ash)

Fraxinus pennsylvanica (Green ash, Red ash)

Fraxinus velutina (Velvet ash, Arizona ash)

Gaillardia pulchella (Blanket flower )

Gaussia (Maya palm, Llume palm, Gaussia, Opsiandra)

Gelsemium sempervirens (Carolina jessamine, yellow jessamine)

Ginkgo biloba (Maidenhair tree)

Gladiolus x hortulanus (Gladiolus)

Gossypium (Cotton)

Grevillea robusta (Silk oak)

Gypsophila paniculata (Baby's breath)

Hedera canariensis (Algerian ivy)

Hedera helix (English ivy)

Helenium amarum (Sneezeweed)

Helenium autumnale (Sneezeweed)

Helianthus annuus (Common Sunflower)

Heracleum (Cow parsnip)

Hibiscus (Mallow, Rose mallow)

Hippeastrum spp. and hybrids (Amaryllis)

Hippomane mancinella (Machineel)

Hippophae rhamnoides (Sea buckthorn)

Holcus lanatus (Common velvetgrass)

Hordeum vulgare (Common Barley)

Humulus lupulus (Common Hop)

Hura crepitans (Sandbox tree, Monkey pistol, Dynamite tree)

Hyacinthus orientalis (Hyacinth)

Hydrangea macrophylla (Hydrangea)

Hymenocallis (Spider lilies.)

Hymenoclea salsola (White cheesebush, Burrobrush)

Hyophorbe lagenicaulis (Bottle palm)

Hyophorbe verschaffeltii ( Spindle palm)

Hypericum perforatum (St. John's wort, Klamath weed)

Indigofera hirsuta (Hairy indigo)

Ipomoea alba (Moonflower, Moon vine)

Iris (Flag, Iris)

Iva angustifolia (Narrow-leaf marsh elder)

Iva annua (Rough marsh elder, Annual marsh elder)

Iva axillaris (Poverty Weed, Deer root)

Iva frutescens (Marsh elder, Coast elder, Jesuit's bark)

Iva xanthifolia (Prairie ragweed)

Jasminum officinale (Jasmine)

Jatropha (Coral plants, Physic nuts)

Juglans ()

Juglans californica (California black walnut, Southern California walnut)

Juglans cinerea (Butternut, White walnut)

Juglans hindsii (Hind's walnut, California black walnut)

Juglans microcarpa (Arizona walnut)

Juglans nigra (Black walnut)

Juglans regia (English walnut)

Juniperus (Junipers, Red cedars)

Juniperus ashei (Mountain cedar, Ashe's juniper)

Juniperus californica (California juniper)

Juniperus chinensis (Pfitzer (Juniper, Chinese))

Juniperus communis (Common Juniper)

Juniperus monosperma (One-seed juniper)

Juniperus occidentalis (Western juniper)

Juniperus osteosperma (Utah juniper)

Juniperus scopulorum (Rocky mountain juniper, Cedar)

Juniperus virginiana (Eastern red cedar)

Koeleria macrantha (Hairgrass)

Krasheninnikovia lanata (Winterfat)

Lactuca ()

Lactuca sativa (Lettuce)

Lactuca scariola (Prickly lettuce)

Lantana camara (Lantana, Wild sage)

Laportea canadensis (Stinging nettle, Canadian wood nettle)

Larix occidentalis (Tamarack, Western larch)

Leonotis nepetifolia (Lion's tail, Hollowstalk, Lion's ear)

Leymus cinereus (Giant wild ryegrass, )

Leymus condensatus (Giant lyme grass)

Leymus triticoides (Rye, wild ( alkali))

Liatris (Blazing star, Gay feather)

Ligustrum japonicum (Japanese privet)

Ligustrum lucidum (Shiny ligustrum, Glossy privet)

Ligustrum vulgare (European privet)

Lillum longiflorum (Lily, Easter)

Liquidambar ()

Liquidambar styraciflua (Sweet gum)

Lobelia (Cardinal flower, Indian pink, lobelia)

Lolium perenne (Perennial ryegrass)

Lolium pratense (Meadow grass)

Lycopodium clavatum (Running club moss)

Maclura pomifera (Osage orange)

Magnolia grandiflora (Southern magnolia.)

Mangifera indica (Mango)

Manilkara ()

Manilkara zapota (Sapodilla)

Mansoa alliacea (Garlic vine)

Matricaria recutita (Wild chamomile)

Medicago ()

Medicago sativa (Alfalfa, lucerne)

Melaleuca quinquenervia (Cajeput, Punk tree)

Melia azedarach (Chinaberry)

Melica ()

Melilotus ()

Melilotus officinalis (Yellow sweet clover)

Mentha (Mint, Peppermint, Spearmint, Pennyroyal, Horsemint)

Metopium toxiferum (Poisonwood)

Monstera deliciosa (Ceriman)

Moringa oleifera (Horseradish tree)

Morus alba (White mulberry)

Morus rubra (Red mulberry)

Mucuna (Cow-itch, Velvet bean)

Myrica ()

Myrica cerifera (Wax Myrtle, Southern Bayberry)

Myrica pensylvanica (Bayberry)

Narcissus (Daffodils, Jonquils, Narcissus)

Narcissus pseudonarcissus (Daffodil)

Nerium oleander (Oleander)

Nicotiana (Tobacco)

Olea europea (European olive)

Opuntia (Beavertail cactus, Tuna, Cholla, Prickly pear cactus)

Ornithogalum (Chincherinchee, Star of Bethlehem)

Oryza sativa (Cultivated rice)

Ostrya virginiana (Hop hornbeam)

Papaver (Poppies)

Paphiopedilum haynaldianum (Lady slipper orchid)

Parietaria judaica (Wall pellitory, Spreading pellitory)

Parkinsonia florida (Palo Verde)

Parthenium (Wild quinine, Santa Maria)

Parthenium argentatum (Guayule)

Parthenium hysterophorus (Santa Maria feverfew)

Parthenocissus quinquefolia (Virginia creeper)

Pascopyrum smithii (Western wheatgrass)

Paspalum notatum (Bahiagrass)

Pastinaca sativum (Wild parsnip)

Pedilanthus tithymaloides (Jacob's ladder, Redbird cactus)

Pelargonium (Geraniums)

Pentalinon luteum (Wild allamanda)

Petroselinum crispum (Parsley)

Phacelia (Scorpion weeds)

Phalaris arundinacea (Reed Canarygrass )

Phalaris canariensis (Common Canarygrass)

Philodendron (Philodendron)

Philodendron scandens (Heartleaf philodendron)

Phleum ()

Phleum pratense (Common Timothy)

Phoenix (Date palms)

Phoenix dactylifera (Date palm)

Phragmites australis (Common Reed)

Picea abies (Norway spruce)

Picea mariana (Black spruce)

Picea rubens (Red spruce)

Picea sitchensis (Sitka spruce)

Pilea pumila (Richweed, Canadian clearweed)

Pinus (Pine trees)

Pinus banksiana (Scrub pine, Jack pine)

Pinus contorta (Lodgepole pine)

Pinus echinata (Short-leaf pine)

Pinus edulis (Two needle pinyon)

Pinus elliottii (Slash pine)

Pinus lambertiana (Sugar pine)

Pinus monticola (Western white pine)

Pinus nigra (Austrian pine)

Pinus palustris (Longleaf pine)

Pinus ponderosa (Ponderosa pine)

Pinus radiata (Monterey pine)

Pinus resinosa (Red pine)

Pinus sabiniana (Digger pine)

Pinus strobus (Eastern white pine)

Pinus sylvestris (Scotch pine)

Pinus taeda (Loblolly pine)

Pinus virginiana (Virginia pine)

Pistia stratiotes (Water lettuce)

Pithecellobium dulce (Guaymochil, Monkey pod)

Plantago lanceolata (English plantain)

Plantago major (Common plantain)

Plantago rugelii (Black-seed plantain)

Platanus occidentalis (American sycamore, Eastern sycamore)

Platanus racemosa (Western sycamore, California sycamore)

Platanus wrightii (Arizona sycamore)

Platanus x acerifolia (Sycamore, Plane tree)

Platycladus orientalis (Oriental arborvitae)

Plumbago auriculata (Leadwort, Cape plumbago)

Plumbago indica (Plumbago)

Plumeria (Frangipani)

Poa ()

Poa compressa (Flat-stem bluegrass)

Poa pratensis (Kentucky bluegrass, June grass)

Poa secunda (Sandberg's bluegrass)

Podophyllum peltatum (May apple)

Polygonum (Knotweeds, Smartweeds)

Polyscias (Ming aralias)

Poncirus trifoliata (Trifoliate orange)

Populus (Poplars, Cottonwoods, Aspen)

Populus alba (White poplar)

Populus balsamifera (Balsam poplar)

Populus deltoides (Eastern cottonwood)

Populus fremontii (Fremont's cottonwood)

Populus nigra 'Italica' (Lombardy poplar, Black poplar)

Populus sargentii (Cottonwood, Western)

Populus tremuloides (Quaking aspen)

Populus wislizenii (Cottonwood, Rio Grande)

Primula malacoides (Fairy primrose)

Primula obconica (Primrose)

Prosopis ()

Prosopis glandulosa (Honey mesquite)

Prunus ()

Prunus armeniaca (Apricot)

Prunus cerasus (Sour cherry)

Prunus domestica (Plum (prune), European plum)

Prunus dulcis (Sweet almond)

Prunus persica (Peach)

Pseudogynoxys chenopodioides (Mexican flame vine)

Pseudoroegneria spicata (Bluebunch wheatgrass)

Pseudotsuga menziesii (Douglas fir)

Pteridum aquilinum (Bracken fern)

Pterocarya fraxinifolia (Wingnut)

Ptychosperma ( Macarthur palm, Ptychosperma, Solitaire)

Pyrus communis (Common Pear)

Quercus (Oaks)

Quercus agrifolia (Coastal live oak)

Quercus alba (Northern white oak)

Quercus bicolor (Blue oak, Swamp white oak)

Quercus chrysolepsis (Canyon live oak)

Quercus dumosa (Coastal sage scrub oak)

Quercus engelmannii (Engelmann's oak)

Quercus falcata (Southern red oak)

Quercus gambelii (Gambel's oak)

Quercus garryana (Garry oak, Oregon white oak)

Quercus ilex (Oak, holly)

Quercus kelloggii (California black oak)

Quercus laurifolia (Laurel oak)

Quercus lobata (Valley oak)

Quercus macrocarpa (Burr oak)

Quercus marilandica (Blackjack oak)

Quercus nigra (Water oak)

Quercus palustris (Swamp oak, Pin oak)

Quercus phellos (Willow oak)

Quercus rubra (Northern red oak)

Quercus stellata (Post oak)

Quercus velutina (Black oak)

Quercus virginiana (Live oak)

Quercus wislizeni (Interior live oak)

Ranunculus (Buttercups, Crowfoots)

Raphanus sativus (Radish)

Rhabdadenia biflora (Rubbervine)

Rheum rhabarbarum (Rhubarb)

Rhoeo spathacea (Oyster plant, Moses-in-a-cradle)

Rhus (Sumacs)

Ricinus communis (Castor bean)

Robinia pseudoacacia (Black locust)

Rosa (Rose)

Rosa multiflora (Rambler rose)

Rosmarinus officinalis (Rosemary)

Roystonea regia (Royal palm)

Rudbeckia hirta (Black-eyed susan)

Rumex acetosa (Garden sorrel)

Rumex acetosella (Red sorrel, Common Sheep sorrel)

Rumex crispus (Curly dock)

Rumex obtusifolius (Bitter dock)

Rumex orbiculatus (Greater water dock)

Ruta graveolens (Rue)

Saccharum officinarum (Sugar cane)

Salicornia virginica (Pickleweed)

Salix (Willows)

Salix caprea (Sallow, Goat willow)

Salix caroliniana (Coastal plain willow)

Salix discolor (Pussy willow)

Salix laevigata (Red willow, Polished willow)

Salix lasiolepis (Arroyo willow)

Salix lucida (Yellow willow)

Salix nigra (Black willow)

Salsola kali (Russian thistle)

Sambucus nigra (Elderberry)

Sanguinaria canadensis (Bloodroot)

Sapindus saponaria (Soapberry)

Sapium sebiferum (Chinese tallow tree, popcorn tree)

Sarcobatus vermiculatus (Greasewood)

Sarcocornia perennis (Pickleweed)

Sassafras albidum (Sassafras)

Schefflera actinophylla (Umbrella tree)

Schinus molle (Pepper Tree)

Schinus terebinthifolius (Brazilian peppertree, Florida holly)

Scirpus (Bulrushes)

Scirpus validus (Bulrush)

Secale cereale (Cultivated Rye)

Senecio (Groundsels)

Senecio glabellus (Butterweed)

Senna siamea (Siamese shower tree)

Sequoia sempervirens (Redwood)

Shepherdia argentea (Silver buffalo berry)

Solandra (Chalice vines, Cup of gold)

Solidago (Goldenrods)

Solidago canadensis (Canadian goldenrod)

Solidago gigantea (Late goldenrod)

Solidago multiradiata (Goldenrod)

Sorghastrum nutans (Yellow Indian grass)

Sorghum bicolor (Sorghum, Sudan grass (subsp, drummondii])

Sorghum halepense (Johnsongrass)

Sparmannia africana (Indoor linden, African hemp)

Spinacia oleracea (Spinach)

Sporobolus cryptandrus (Sand dropseed)

Sterculia apetala (Panama tree)

Stillingia sylvatica (Queen's delight)

Streptocarpus (Cape primroses)

Suaeda californica (California Seablite, Broom seepweed)

Suaeda maritima (Seablite, Herbaceous seepweed)

Suaeda moquinii (Seablite, alkall)

Syagrus romanzoffiana (Queen palm, Cocos plumosa)

Syngonium podophyllum (Nephthytis)

Syringa vulgaris (Common Lilac)

Tagetes patula (French marigold)

Tamarix aphylla (Athel tamarisk)

Tamarix gallica (Salt cedar, French tamarisk)

Tanecetum vulgare (Common Tansy)

Taraxacum officinale (Common Dandelion)

Taxodium ascendens (Pond cypress)

Taxodium distichum (Southern bald cypress)

Terminalia muelleri (Mueller's terminalia, Eandi)

Tetrapanax papyriferus (Rice paper plant)

Thevetia peruviana (Yellow oleander)

Thuja occidentalis (White cedar, Eastern arborvitae)

Thuja plicata (Western cedar, Western arborvitae)

Thymus vulgaris (Thyme)

Tilia americana (American linden, American basswood )

Tilia cordata (Small-leaf linden, lime)

Toxicodendron pubescens (Poison oak)

Toxicodendron radicans (Poison ivy)

Toxicodendron vernix (Poison sumac, Poison ash, Poison elder)

Tradecantia pallida (Purple queen, Purple heart)

Tragia (Noseburn)

Trifolium pratense (Red clover)

Trifolium repens (White clover)

Triticum aestivum (Cultivated bread wheat)

Tropaeolum majus (Nasturtium)

Tsuga canadensis (Eastern hemlock)

Tsuga heterophylla (Western hemlock)

Tsuga mertensiana (Mountain hemlock)

Tulipa (Tulips)

Typha (Cattails)

Typha angustifolia (Narrow leaf cattail)

Typha latifolia (Broad leaf cattail, Common Cattail)

Ulmus alata (Winged elm)

Ulmus americana (American elm, White elm)

Ulmus crassifolia (Cedar elm)

Ulmus parvifolia (Chinese elm)

Ulmus pumila (Siberian elm)

Ulmus rubra (Slippery elm)

Urochloa mutica (Para)

Urtica dioica (Stinging nettle)

Vanilla planifolia (Vanilla)

Vernicia fordii (Tung oil tree)

Vinca (Periwinkle)

Vitex trifolia (Vitex)

Xanthium spinosum (Spiny cocklebur)

Xanthium strumarium (Cockleburs)

Xanthosoma sagittifolium (Malanga, Elephant ear)

Xanthosoma violaceum (Malanga, Purple elephant ear)

Zantedeschia (Calla lilies)

Zea mays (Corn, Maize)

Zone 2 Zone 4 Zone 3 Zone 7 Zone 1 Zone 5 Zone 6 Zone 8 Zone 9 Zone 10