Dangerous plants

[Quixoticgeek]

Was watching a program recently on plants that are harmful to humans through contact. It was a US program so only really mentioned Poison Oak, Poison Ivy, and the like. But it got me thinking, in the UK and Northwestern Europe, other than stinging nettles and the now naturalised Giant Hogweed, are there any other plants that can cause injury through contact (not including thorned/prickled plants).

Just curious.

J

 

[santaman2000]

Not sure about Europe but even in the US, poison oak and poison ivy aren't the only ones. We also have poison sumac and stinging nettles. As well as stinging golf ball plants, poison hemlock (not native but established) cow parsnip, giant hogweed, and spurges.

 

[goat]

Certainly some spurges in the uk, ragwort to a lesser degree, sure there are others, mind has gone blank.

 

[crosslandkelly]

Listed on the RHS

Acalypha (chenille plant, copperleaf) - skin & eye irritant; poisonous
Acokanthera (bushman’s poison) - poisonous
Aconitum (monkshood) - poisonous; irritant to and via the skin
Actaea section Actaea (baneberry) - poisonous; irritant to and via the skin
Aesculus (horse chestnut) - somewhat poisonous
Aglaonema (Chinese evergreen) - poisonous; skin irritant
Agrostemma githago (corncockle) - somewhat poisonous
alder buckthorn - see Rhamnus
Allamanda - poisonous; skin & eye irritant
Alocasia (taro) - poisonous; skin & eye irritant
Aloe - poisonous
Alstroemeria (Peruvian lily) - skin irritant
Amaryllis - see Hippeastrum
Amaryllis belladona (belladonna lily) - poisonous
Angel’s trumpet - see Brugmansia
Angel’s wings - see Caladium
Anthurium (flamingo flower) - poisonous; skin & eye irritant
Apocynum (dogbane) - poisonous
Arisaema (cobra-lily) - poisonous; skin & eye irritant
Arrowhead vine - see Syngonium
Arum (cuckoo-pint, lords-and-ladies) - poisonous; skin & eye
irritant
Asparagus (asparagus fern) - may cause skin allergy, fruits
poisonous
Asparagus fern See Asparagus
Atropa (deadly nightshade) - poisonous; skin irritant
Autumn crocus See Colchicum
Baneberry - see Actaea section Actaea
Belladonna lily - see Amaryllis belladona
Bluebell - see Hyacinthoides
Bottle gourd - see Lagenaria
Brugmansia (angel’s trumpet) - poisonous
Brunfelsia (yesterday, today and tomorrow) - poisonous
Buckthorn - see Rhamnus
Bunny ears cactus - see Opuntia microdasys
Burning bush - see Dictamnus
Bushman’s poison - see Acokanthera
Caladium (angel’s wings) - poisonous
Calico bush - see Kalmia
Calla lily - see Zantedeschia
Calla palustris (water arum) - poisonous; skin & eye irritant
Capsicum annum (ornamental pepper cultivars)- skin & eye irritant;
poisonous
Castor oil plant - see Ricinus communis
Celandine, greater - see Chelidonium majus
Chalice vine - see Solandra
Chaste tree - see Vitex
Chelidonium majus (greater celandine) - poisonous; skin & eye irritant
Chenille plant - see Acalypha
Cherry laurel - see Prunus laurocerasus
Chincherinchee - see Ornithogalum
Chinese evergreen - see Aglaonema
Christmas cherry - see Solanum pseudocapsicum
Chrysanthemum - skin irritant
Cobra-lily - see Arisaema
Colchicum (autumn crocus) - poisonous
Colocasia esculenta (dasheen, eddo, taro) - poisonous; skin & eye irritant
Comfrey, Russian comfrey - see Symphytum
Convallaria majalis (lily-of-the-valley) - poisonous
Copperleaf - see Acalypha
Coriaria - poisonous
Corncockle - see Agrostemma githago
Crepe jasmine - see Tabernaemontana
Cuckoo-pint - see Arum
x Cuprocyparis leylandii (Leyland cypress) - skin irritant
Daffodil - see Narcissus
Daphne (mezereon, spurge laurel) - poisonous; skin irritant
Dasheen - see Colocasia esculenta
Datura (thornapple) - poisonous; skin irritant
Deadly nightshade - see Atropa
Delphinium including Consolida (larkspur) - poisonous
Dendranthema - see Chrysanthemum
Devil’s ivy - see Epipremnum
Dictamnus (burning bush) - skin irritant
Dieffenbachia (dumb cane, leopard lily) - poisonous; skin & eye irritant
Digitalis (foxglove) - poisonous
Dogbane - see Apocynum
Dracunculus (dragon arum) - poisonous; skin & eye irritant
Dragon arum - see Dracunculus
Dumb cane - see Dieffenbachia
Echium - skin irritant
Eddo - see Colocasia esculenta
Elder - see Sambucus
Epipremnum (devil’s ivy) - poisonous; skin & eye irritant
Euonymus (spindle tree) - somewhat poisonous
Euphorbia (spurge, poinsettia) - poisonous; skin & eye irritant NB: poinsettia, E. pulcherrima, is not harmful
False hellebore - see Veratrum
False jasmine - see Gelsemium
Ficus benjamina (weeping fig) - may cause skin allergy
Ficus carica (fig) - skin & eye irritant
Fig - see Ficus
Flamingo flower - see Anthurium
Four o’clock plant - see Mirabilis
Foxglove - see Digitalis
Frangula - see Rhamnus
Fremontodendron - skin & eye irritant
Gaultheria section Pernettya - somewhat poisonous
Gelsemium (false jasmine) - poisonous
German primula - see Primula obconica
Gloriosa superba (glory lily) - poisonous
Glory lily - see Gloriosa superba
Goosefoot vine - see Syngonium
Hedera (ivy) - somewhat poisonous; skin irritant
Hellebore, false - see Veratrum
Helleborus (Christmas rose, Lenten rose) - somewhat poisonous; skin irritant
Hemlock water-dropwort - see Oenanthe
Henbane - see Hyoscyamus
Heracleum mantegazzianum (giant hogweed) - severe skin irritant in bright sunlight
Heracleum sphondylium (hogweed, common hogweed) and other Heracleum spp - severe skin irritant in bright sunlight
Hippeastrum (amaryllis) - poisonous
Hogweed - see Heracleum
Homeria - poisonous
Horse chestnut - see Aesculus
Hyacinthoides (bluebell) - poisonous
Hyacinth - see Hyacinthus
Hyacinthus (hyacinth) - skin irritant
Hyoscyamus (henbane) - poisonous
Hypericum perforatum (perforate St John’s wort) - poisonous
Ipomoea (morning glory) - poisonous
Iris - somewhat poisonous; skin irritant
Ivy - see Hedera
Japanese lacquer tree - see Rhus
Jasmine, false - see Gelsemium
Kalmia (calico bush) - somewhat poisonous
+ Laburnocytisus ‘Adamii’ - poisonous
Laburnum - poisonous
Lagenaria (bottle gourd) - poisonous
Lantana - poisonous; skin irritant
Larkspur - see Delphinium
Laurel - see Prunus laurocerasus
Lenten rose - see Helleborus
Leopard lily - see Dieffenbachia
Leyland cypress - see x Cupressocyparis leylandii
Ligustrum (privet) - somewhat poisonous
Lily-of-the-valley - see Convallaria majalis
Lobelia (except bedding lobelia, L. erinus) - somewhat poisonous; skin & eye irritant
Locust tree - see Robinia pseudoacacia
Lords-and-ladies - see Arum
Lupin - see Lupinus
Lupinus (lupin) - somewhat poisonous
Lysichiton (skunk cabbage) - poisonous; skin & eye irritant
Mandragora (mandrake) - poisonous
Mandrake - see Mandragora
Marvel of Peru - see Mirabilis
May apple - see Podophyllum
Mezereon - see Daphne
Mirabilis (marvel of Peru, four o’clock plant) - poisonous; skin irritant
Monkshood - see Aconitum
Monstera deliciosa (Swiss cheese plant) - poisonous; skin & eye irritant
Morning glory - see Ipomoea
Narcissus (daffodil) - somewhat poisonous; skin irritant
Nerium oleander (oleander) - poisonous
Nicotiana (tobacco) - poisonous
Oenanthe crocata, O. aquatica, O. phellandrium (hemlock water-dropwort, water dropwort) - poisonous
Oleander - see Nerium oleander
Oleander, yellow - see Thevetia
Opium poppy - see Papaver somniferum
Opuntia microdasys (bunny ears cactus) - skin irritant
Ornithogalum (chincherinchee, star-of-Bethlehem) - somewhat poisonous; skin irritant
Pagoda tree - see Sophora
Papaver somniferum (opium poppy) - poisonous
Parsnip - see Pastinaca sativa
Passiflora caerulea (hardy passion flower) - somewhat poisonous
Passion flower - see Passiflora caerulea
Pastinaca sativa (parsnip) - severe skin irritant in bright sunlight
Peace lily - see Spathiphyllum
Pedilanthus - skin & eye irritant; poisonous
Pepper, ornamental - see Capsicum annum
Pernettya - see Gaultheria
Peruvian lily - see Alstroemeria
Philodendron - poisonous; skin & eye irritant
Phytolacca (pokeweed) - poisonous; skin irritant
Podophyllum (May apple) - poisonous
Poinsettia - see Euphorbia
Poison ivy - see Rhus
Pokeweed - see Phytolacca
Polygonatum (Solomon’s seal) - somewhat poisonous
Polyscias - poisonous; skin irritant
Portugal laurel - see Prunus lusitanica
Primula obconica (German primula) - skin irritant
Privet - see Ligustrum
Prunus laurocerasus (cherry laurel, laurel) - poisonous
Prunus lusitanica (Portugal laurel) - seed kernels are poisonous
Rhamnus including Frangula (alder buckthorn, buckthorn) – poisonous; skin irritant
Rhaphidophora - poisonous; skin & eye irritant
Rhus verniciflua, R. radicans, R. succedanea, R. diversiloba, R. rydbergii,R. striata, R. toxicarium, R. vernix (Japanese lacquer tree, Poison ivy, Sumach) - poisonous; severe skin irritant
Ricinus communis (castor oil plant) - poisonous
Robinia pseudoacacia (locust tree) - poisonous
Ruta (rue) - severe skin irritant in bright sunlight
St John’s wort - see Hypericum perforatum
Sambucus except S. nigra (elder) - poisonous
Schefflera (Umbrella tree) - skin irritant
Scilla - somewhat poisonous
Scopolia - poisonous
Skunk cabbage - see Lysichiton
Snowberry - see Symphoricarpos
Solandra (chalice vine) - poisonous
Solanum - poisonous
Solanum pseudocapsicum (Christmas cherry, winter cherry) - poisonous
Solomon’s seal - See Polygonatum
Sophora (pagoda tree) - poisonous
Spanish broom - see Spartium junceum
Spartium junceum (Spanish broom) - poisonous
Spathiphyllum (peace lily) - poisonous; skin & eye irritant
Spindle tree - see Euonymus
Spurge - see Euphorbia
Spurge laurel - see Daphne
Star-of-Bethlehem - see Ornithogalum
Sumach - see Rhus
Swiss cheese plant - See Monstera deliciosa
Symphoricarpos (snowberry) - poisonous
Symphytum (comfrey, Russian comfrey) - poisonous
Syngonium (arrowhead vine, goosefoot vine) - poisonous; skin & eye irritant
Tobacco - see Nicotiana
Tabernaemontana (crepe jasmine) - poisonous
Taro – see Alocasia, Colocasia
Taxus (yew) - poisonous
Thevetia (yellow oleander) - poisonous; skin irritant
Thornapple - see Datura
Tulip - see Tulipa
Tulipa (tulip) - skin irritant
Umbrella tree - see Schefflera
Veratrum (false hellebore) - poisonous
Vitex (chaste tree) - skin irritant
Water arum - see Calla palustris
Water-dropwort - see Oenanthe
Winter cherry - see Solanum pseudocapsicum
Wisteria - somewhat poisonous
Woody nightshade - see Solanum
Xanthosoma - poisonous; skin & eye irritant
Yesterday, today and tomorrow - see Brunfelsia
Yew - See Taxus
Zantedeschia (calla lily) - poisonous; skin & eye irritant.

 

[santaman2000]

.......
Aloe - poisonous.......

Seems to be some contradictory information about aloe: www.drugs.com/npp/aloe.html We most often use it topically as an antibiotic or as a sunburn relief.

 

[Toddy]

That's a heck of a list Colin, and it's confusing, isn't it ? After all some folks are allergic to strawberries, but it doesn't make them a candidate for the 'poisonous' list…..and parsnips are good food, yet they're on the list too.

I take Julia's point though, and think that that and Goat's reply are a good basis for the UK.

Out and about, what not to touch ?


Cuckoo pint/Lords and Ladies (lovely bright tasty-looking berries, and a starch rich root that needs very careful preparation. It's not only toxic, but it causes hellish dermatitis)
Giant hogweed (sap blisters skin in sunlight, and that's any sunlight. Old, dry, stem tubes are fine)
Hemlock water dropwort (just don't. It's the most poisonous British plant)
Laburnum (it's beautiful, but it's all poisonous, and the 'peas' tempt the unwary)
https://chempics.wordpress.com/2014/06/18/common-laburnum-laburnum-anagyroides/
Nettles (unless it's intentional )
Ragwort (horrible stuff, good dye, and a food plant for many butterflies, toxic weed of pasture)
Spurges (the milky sap is bad news, it burns eyes, and it's persistent)http://www.theguardian.com/lifeandstyle/gardening-blog/2013/mar/27/euphorbia-amygdaloides-wood-spurge
Yew (fruits apart. Lovely timber, don't handle fresh and then eat without washing)





I like this thread Julia I like it's timeliness, and it would be excellent if folks would add to the list.
Not just names, but a wee comment too that helps stick things in the mind.

atb,
Mary

 

[Laurentius]

That's a heck of a list Colin, and it's confusing, isn't it ? After all some folks are allergic to strawberries, but it doesn't make them a candidate for the 'poisonous' list…..and parsnips are good food, yet they're on the list too.

Parsnip leaves contain the same chemical as giant hogweed and have been known to burn people from mere contact, me included.

 

[crosslandkelly]

Seems to be some contradictory information about aloe: www.drugs.com/npp/aloe.html We most often use it topically as an antibiotic or as a sunburn relief.

I was also surprised by that, so I looked further. http://www.livestrong.com/article/446586-is-the-aloe-vera-plant-toxic/

That's a heck of a list Colin, and it's confusing, isn't it ? After all some folks are allergic to strawberries, but it doesn't make them a candidate for the 'poisonous' list…..and parsnips are good food, yet they're on the list too.

I take Julia's point though, and think that that and Goat's reply are a good basis for the UK.

Out and about, what not to touch ?


Cuckoo pint/Lords and Ladies (lovely bright tasty-looking berries, and a starch rich root that needs very careful preparation. It's not only toxic, but it causes hellish dermatitis)
Giant hogweed (sap blisters skin in sunlight, and that's any sunlight. Old, dry, stem tubes are fine)
Hemlock water dropwort (just don't. It's the most poisonous British plant)
Laburnum (it's beautiful, but it's all poisonous, and the 'peas' tempt the unwary)
https://chempics.wordpress.com/2014/06/18/common-laburnum-laburnum-anagyroides/
Nettles (unless it's intentional )
Ragwort (horrible stuff, good dye, and a food plant for many butterflies, toxic weed of pasture)
Spurges (the milky sap is bad news, it burns eyes, and it's persistent)http://www.theguardian.com/lifeandstyle/gardening-blog/2013/mar/27/euphorbia-amygdaloides-wood-spurge
Yew (fruits apart. Lovely timber, don't handle fresh and then eat without washing)





I like this thread Julia I like it's timeliness, and it would be excellent if folks would add to the list.
Not just names, but a wee comment too that helps stick things in the mind.

atb,
Mary

Hi Mary, I was surprised at the length of the RHS list too, but thought it worth mentioning.
The woods that the Suffolk group use, used to be full of Dogs Mercury. But we have been slowly clearing it.

 

[santaman2000]

I was also surprised by that, so I looked further. http://www.livestrong.com/article/446586-is-the-aloe-vera-plant-toxic/
.......QUOTE]

Thanks for that link. Useful info.

 

[forrestdweller]

did know you can get that many poisonous plants in Europe.....


I did notice taro on the list ( will read in detail later,just a quick look now....):
did not know it can be grown in Europe and which part is dangerous?! I know its a food plant in Japan, Korea and the pacific and I ate it without side effects.....

 

[santaman2000]

did know you can get that many poisonous plants in Europe.....


I did notice taro on the list ( will read in detail later,just a quick look now....):
did not know it can be grown in Europe and which part is dangerous?! I know its a food plant in Japan, Korea and the pacific and I ate it without side effects.....

Tomatoes, potatoes, sweet potatoes, and others are also a food plant but the leaves are poisonous (to ingest) as they're similar to nightshade.

 

[Toddy]

……but do we find parsnips, sweet potatoes and aloe when out there here ?

Not usually.

Dog's Mercury though; you could add that to the list please Colin ?

M

 

[forrestdweller]

I think you can add rhubarb to the list above, too: the leaves are poisonous.....

 

[Quixoticgeek]

I think you can add rhubarb to the list above, too: the leaves are poisonous.....

Are they poisonous on contact? If I walked through a rhubarb field wearing shorts would my legs have an adverse reaction? That's the reasoning behind this thread, stuff that you might brush past when walking, or sit on by mistake. Rather than ingestion.

J

 

[santaman2000]

……but do we find parsnips, sweet potatoes and aloe when out there here ?

Not usually....

Maybe. Maybe not. Aloe Vera is thought to be extinct in the wild but there are over 500 other species of Aloe and in turn they are all succulents (which are wide spread) so I suppose it's possible?

 

[Hunkyfunkster]

Is there a definitive pocket guide or guides out there to help identify these? I can just about tell the difference between a flower and a tree, plants are the wife's thing, I've never been any good at it.




Alex

 

[Toddy]

Maybe. Maybe not. Aloe Vera is thought to be extinct in the wild but there are over 500 other species of Aloe and in turn they are all succulents (which are wide spread) so I suppose it's possible?

See Julia's reply though.

Aloe isn't native here, but the houseleek is and it's every bit as good Poison oak, ivy and sumac…..I've never, ever, seen them. Tbh I think those are plants you can keep that side of the Atlantic

M

 

[forrestdweller]

Are they poisonous on contact? If I walked through a rhubarb field wearing shorts would my legs have an adverse reaction? That's the reasoning behind this thread, stuff that you might brush past when walking, or sit on by mistake. Rather than ingestion.

J

not to my knowledge(or experience).....

no idea if its possible to have an allergic reaction to it

 

[Harvestman]

Listed on the RHS

Acalypha (chenille plant, copperleaf) - skin & eye irritant; poisonous
Acokanthera (bushman’s poison) - poisonous
Aconitum (monkshood) - poisonous; irritant to and via the skin
Actaea section Actaea (baneberry) - poisonous; irritant to and via the skin
Aesculus (horse chestnut) - somewhat poisonous
Aglaonema (Chinese evergreen) - poisonous; skin irritant
Agrostemma githago (corncockle) - somewhat poisonous
alder buckthorn - see Rhamnus
Allamanda - poisonous; skin & eye irritant
Alocasia (taro) - poisonous; skin & eye irritant
Aloe - poisonous
Alstroemeria (Peruvian lily) - skin irritant
Amaryllis - see Hippeastrum
Amaryllis belladona (belladonna lily) - poisonous
Angel’s trumpet - see Brugmansia
Angel’s wings - see Caladium
Anthurium (flamingo flower) - poisonous; skin & eye irritant
Apocynum (dogbane) - poisonous
Arisaema (cobra-lily) - poisonous; skin & eye irritant
Arrowhead vine - see Syngonium
Arum (cuckoo-pint, lords-and-ladies) - poisonous; skin & eye
irritant
Asparagus (asparagus fern) - may cause skin allergy, fruits
poisonous
Asparagus fern See Asparagus
Atropa (deadly nightshade) - poisonous; skin irritant
Autumn crocus See Colchicum
Baneberry - see Actaea section Actaea
Belladonna lily - see Amaryllis belladona
Bluebell - see Hyacinthoides
Bottle gourd - see Lagenaria
Brugmansia (angel’s trumpet) - poisonous
Brunfelsia (yesterday, today and tomorrow) - poisonous
Buckthorn - see Rhamnus
Bunny ears cactus - see Opuntia microdasys
Burning bush - see Dictamnus
Bushman’s poison - see Acokanthera
Caladium (angel’s wings) - poisonous
Calico bush - see Kalmia
Calla lily - see Zantedeschia
Calla palustris (water arum) - poisonous; skin & eye irritant
Capsicum annum (ornamental pepper cultivars)- skin & eye irritant;
poisonous
Castor oil plant - see Ricinus communis
Celandine, greater - see Chelidonium majus
Chalice vine - see Solandra
Chaste tree - see Vitex
Chelidonium majus (greater celandine) - poisonous; skin & eye irritant
Chenille plant - see Acalypha
Cherry laurel - see Prunus laurocerasus
Chincherinchee - see Ornithogalum
Chinese evergreen - see Aglaonema
Christmas cherry - see Solanum pseudocapsicum
Chrysanthemum - skin irritant
Cobra-lily - see Arisaema
Colchicum (autumn crocus) - poisonous
Colocasia esculenta (dasheen, eddo, taro) - poisonous; skin & eye irritant
Comfrey, Russian comfrey - see Symphytum
Convallaria majalis (lily-of-the-valley) - poisonous
Copperleaf - see Acalypha
Coriaria - poisonous
Corncockle - see Agrostemma githago
Crepe jasmine - see Tabernaemontana
Cuckoo-pint - see Arum
x Cuprocyparis leylandii (Leyland cypress) - skin irritant
Daffodil - see Narcissus
Daphne (mezereon, spurge laurel) - poisonous; skin irritant
Dasheen - see Colocasia esculenta
Datura (thornapple) - poisonous; skin irritant
Deadly nightshade - see Atropa
Delphinium including Consolida (larkspur) - poisonous
Dendranthema - see Chrysanthemum
Devil’s ivy - see Epipremnum
Dictamnus (burning bush) - skin irritant
Dieffenbachia (dumb cane, leopard lily) - poisonous; skin & eye irritant
Digitalis (foxglove) - poisonous
Dogbane - see Apocynum
Dracunculus (dragon arum) - poisonous; skin & eye irritant
Dragon arum - see Dracunculus
Dumb cane - see Dieffenbachia
Echium - skin irritant
Eddo - see Colocasia esculenta
Elder - see Sambucus
Epipremnum (devil’s ivy) - poisonous; skin & eye irritant
Euonymus (spindle tree) - somewhat poisonous
Euphorbia (spurge, poinsettia) - poisonous; skin & eye irritant NB: poinsettia, E. pulcherrima, is not harmful
False hellebore - see Veratrum
False jasmine - see Gelsemium
Ficus benjamina (weeping fig) - may cause skin allergy
Ficus carica (fig) - skin & eye irritant
Fig - see Ficus
Flamingo flower - see Anthurium
Four o’clock plant - see Mirabilis
Foxglove - see Digitalis
Frangula - see Rhamnus
Fremontodendron - skin & eye irritant
Gaultheria section Pernettya - somewhat poisonous
Gelsemium (false jasmine) - poisonous
German primula - see Primula obconica
Gloriosa superba (glory lily) - poisonous
Glory lily - see Gloriosa superba
Goosefoot vine - see Syngonium
Hedera (ivy) - somewhat poisonous; skin irritant
Hellebore, false - see Veratrum
Helleborus (Christmas rose, Lenten rose) - somewhat poisonous; skin irritant
Hemlock water-dropwort - see Oenanthe
Henbane - see Hyoscyamus
Heracleum mantegazzianum (giant hogweed) - severe skin irritant in bright sunlight
Heracleum sphondylium (hogweed, common hogweed) and other Heracleum spp - severe skin irritant in bright sunlight
Hippeastrum (amaryllis) - poisonous
Hogweed - see Heracleum
Homeria - poisonous
Horse chestnut - see Aesculus
Hyacinthoides (bluebell) - poisonous
Hyacinth - see Hyacinthus
Hyacinthus (hyacinth) - skin irritant
Hyoscyamus (henbane) - poisonous
Hypericum perforatum (perforate St John’s wort) - poisonous
Ipomoea (morning glory) - poisonous
Iris - somewhat poisonous; skin irritant
Ivy - see Hedera
Japanese lacquer tree - see Rhus
Jasmine, false - see Gelsemium
Kalmia (calico bush) - somewhat poisonous
+ Laburnocytisus ‘Adamii’ - poisonous
Laburnum - poisonous
Lagenaria (bottle gourd) - poisonous
Lantana - poisonous; skin irritant
Larkspur - see Delphinium
Laurel - see Prunus laurocerasus
Lenten rose - see Helleborus
Leopard lily - see Dieffenbachia
Leyland cypress - see x Cupressocyparis leylandii
Ligustrum (privet) - somewhat poisonous
Lily-of-the-valley - see Convallaria majalis
Lobelia (except bedding lobelia, L. erinus) - somewhat poisonous; skin & eye irritant
Locust tree - see Robinia pseudoacacia
Lords-and-ladies - see Arum
Lupin - see Lupinus
Lupinus (lupin) - somewhat poisonous
Lysichiton (skunk cabbage) - poisonous; skin & eye irritant
Mandragora (mandrake) - poisonous
Mandrake - see Mandragora
Marvel of Peru - see Mirabilis
May apple - see Podophyllum
Mezereon - see Daphne
Mirabilis (marvel of Peru, four o’clock plant) - poisonous; skin irritant
Monkshood - see Aconitum
Monstera deliciosa (Swiss cheese plant) - poisonous; skin & eye irritant
Morning glory - see Ipomoea
Narcissus (daffodil) - somewhat poisonous; skin irritant
Nerium oleander (oleander) - poisonous
Nicotiana (tobacco) - poisonous
Oenanthe crocata, O. aquatica, O. phellandrium (hemlock water-dropwort, water dropwort) - poisonous
Oleander - see Nerium oleander
Oleander, yellow - see Thevetia
Opium poppy - see Papaver somniferum
Opuntia microdasys (bunny ears cactus) - skin irritant
Ornithogalum (chincherinchee, star-of-Bethlehem) - somewhat poisonous; skin irritant
Pagoda tree - see Sophora
Papaver somniferum (opium poppy) - poisonous
Parsnip - see Pastinaca sativa
Passiflora caerulea (hardy passion flower) - somewhat poisonous
Passion flower - see Passiflora caerulea
Pastinaca sativa (parsnip) - severe skin irritant in bright sunlight
Peace lily - see Spathiphyllum
Pedilanthus - skin & eye irritant; poisonous
Pepper, ornamental - see Capsicum annum
Pernettya - see Gaultheria
Peruvian lily - see Alstroemeria
Philodendron - poisonous; skin & eye irritant
Phytolacca (pokeweed) - poisonous; skin irritant
Podophyllum (May apple) - poisonous
Poinsettia - see Euphorbia
Poison ivy - see Rhus
Pokeweed - see Phytolacca
Polygonatum (Solomon’s seal) - somewhat poisonous
Polyscias - poisonous; skin irritant
Portugal laurel - see Prunus lusitanica
Primula obconica (German primula) - skin irritant
Privet - see Ligustrum
Prunus laurocerasus (cherry laurel, laurel) - poisonous
Prunus lusitanica (Portugal laurel) - seed kernels are poisonous
Rhamnus including Frangula (alder buckthorn, buckthorn) – poisonous; skin irritant
Rhaphidophora - poisonous; skin & eye irritant
Rhus verniciflua, R. radicans, R. succedanea, R. diversiloba, R. rydbergii,R. striata, R. toxicarium, R. vernix (Japanese lacquer tree, Poison ivy, Sumach) - poisonous; severe skin irritant
Ricinus communis (castor oil plant) - poisonous
Robinia pseudoacacia (locust tree) - poisonous
Ruta (rue) - severe skin irritant in bright sunlight
St John’s wort - see Hypericum perforatum
Sambucus except S. nigra (elder) - poisonous
Schefflera (Umbrella tree) - skin irritant
Scilla - somewhat poisonous
Scopolia - poisonous
Skunk cabbage - see Lysichiton
Snowberry - see Symphoricarpos
Solandra (chalice vine) - poisonous
Solanum - poisonous
Solanum pseudocapsicum (Christmas cherry, winter cherry) - poisonous
Solomon’s seal - See Polygonatum
Sophora (pagoda tree) - poisonous
Spanish broom - see Spartium junceum
Spartium junceum (Spanish broom) - poisonous
Spathiphyllum (peace lily) - poisonous; skin & eye irritant
Spindle tree - see Euonymus
Spurge - see Euphorbia
Spurge laurel - see Daphne
Star-of-Bethlehem - see Ornithogalum
Sumach - see Rhus
Swiss cheese plant - See Monstera deliciosa
Symphoricarpos (snowberry) - poisonous
Symphytum (comfrey, Russian comfrey) - poisonous
Syngonium (arrowhead vine, goosefoot vine) - poisonous; skin & eye irritant
Tobacco - see Nicotiana
Tabernaemontana (crepe jasmine) - poisonous
Taro – see Alocasia, Colocasia
Taxus (yew) - poisonous
Thevetia (yellow oleander) - poisonous; skin irritant
Thornapple - see Datura
Tulip - see Tulipa
Tulipa (tulip) - skin irritant
Umbrella tree - see Schefflera
Veratrum (false hellebore) - poisonous
Vitex (chaste tree) - skin irritant
Water arum - see Calla palustris
Water-dropwort - see Oenanthe
Winter cherry - see Solanum pseudocapsicum
Wisteria - somewhat poisonous
Woody nightshade - see Solanum
Xanthosoma - poisonous; skin & eye irritant
Yesterday, today and tomorrow - see Brunfelsia
Yew - See Taxus
Zantedeschia (calla lily) - poisonous; skin & eye irritant.

Basically, just stay inside. It's safer. Wait. Don't most accidents occur in the home? We're all doomed! Doomed I tell ye....

 

[Nice65]

Not wild or native, but I got bad blisters from celery harvesting in the sun.