Absinth wormwood

Absinth wormwood

Artemisia absinthium L.
Moderate
Aconite-leaf buttercup

Aconite-leaf buttercup

Ranunculus aconitifolius L.
High
African plantain

African plantain

Plantago afra L. (synonyms: Psyllium afrum (L.) Mirb., Plantago psyllium L.)
Low
Alder buckthorn

Alder buckthorn

Frangula alnus Mill.; Rhamnus frangula L.
High
Alfalfa

Alfalfa

Medicago sativa L.
Non-toxic
Alpenrose

Alpenrose

Rhododendron ferrugineum L.
Non-toxic
Alpine Rose

Alpine Rose

Rosa pendulina L. (synonym: Rosa alpina L.)
Non-toxic
Alpine aster

Alpine aster

Aster alpinus L.
Non-toxic
Alpine clematis

Alpine clematis

Clematis alpina (L.) Mill.
Moderate
Alpine delphinium

Alpine delphinium

Delphinium elatum L.
Moderate
Alpine squill

Alpine squill

Scilla bifolia L.
Low
Angular Solomon's seal

Angular Solomon's seal

Polygonatum odoratum (Mill.) Druce, Polygonatum officinale All.
Moderate
Anise

Anise

Pimpinella anisum L.
Non-toxic
Annual nettle

Annual nettle

Urtica urens L.
Non-toxic
Arnica

Arnica

Arnica montana L.
Low
Ashwagandha

Ashwagandha

Withania somnifera (L.) Dunal (syn. Physalis somnifera L.)
Non-toxic
Asian Ponysfoot

Asian Ponysfoot

Dichondra micrantha Urb.
Non-toxic
Basket willow

Basket willow

Salix viminalis L.
Low
Bearberry

Bearberry

Arctostaphylos uva-ursi (L.) Spreng.
Non-toxic
Bird's-foot trefoil

Bird's-foot trefoil

Lotus corniculatus L.
Non-toxic
Black Elderberry

Black Elderberry

Sambucus nigra L.
Moderate
Black Henbane

Black Henbane

Hyoscyamus niger L.
Severe
Black Nightshade

Black Nightshade

Solanum nigrum
Moderate
Black medic

Black medic

Medicago lupulina L.
Non-toxic
Blackberry

Blackberry

Rubus fruticosus aggr.
Non-toxic
Blackthorn

Blackthorn

Prunus spinosa L.
Low
Bladder cherry

Bladder cherry

Physalis alkekengi L.
Non-toxic
Blond Psyllium

Blond Psyllium

Plantago ovata Forssk.; Plantago fastigiata E. Morris; Plantago insularis Eastw.; Plantago ispaghula Roxb. ex Fleming
Low
Blue plumbago

Blue plumbago

Plumbago auriculata Lam.; Plumbago capensis Thunb.
Non-toxic
Bog Bilberry

Bog Bilberry

Vaccinium uliginosum aggr., Vaccinium uliginosum L., Vaccinium gaultherioides Bigelow, Vaccinium uliginosum subsp. microphyllum (Lange) Tolm.
Moderate
Bog rosemary

Bog rosemary

Andromeda polifolia L.
High
Boldo

Boldo

Peumus boldus Molina
Low
Boston Ivy

Boston Ivy

Parthenocissus tricuspidata (Siebold & Zucc.) Planch.; Parthenocissus veitchii (Carrière) Graebn.
Low
Brake Fern

Brake Fern

Pteridium aquilinum
Moderate
Breckland thyme

Breckland thyme

Thymus serpyllum aggr.
Non-toxic
Brittle bladder-fern

Brittle bladder-fern

Cystopteris fragilis (L.) Bernh.
Non-toxic
Broad-leaved dock

Broad-leaved dock

Rumex obtusifolius L.
Low
Broom

Broom

Cytisus scoparius (L.) Link
Moderate
Brown knapweed

Brown knapweed

Centaurea jacea L.s.L.; Centaurea jacea L.s.str.; Centaurea jacea subsp. angustifolia Gremli; Centaurea jacea subsp. gaudinii (Boiss. & Reut.) Gremli
Non-toxic
Bush vetch

Bush vetch

Vicia sepium L.
Non-toxic
Canada goldenrod

Canada goldenrod

Solidago canadensis L.
Non-toxic
Caper spurge

Caper spurge

Euphorbia lathyris L.
High
Caraway

Caraway

Carum carvi
Non-toxic
Cardoon, Artichoke Thistle

Cardoon, Artichoke Thistle

Cynara cardunculus L.; Cynara scolymus L.
Non-toxic
Carrot Flower

Carrot Flower

Daucus carota var. sativa
Low
Celery

Celery

Apium graveolens L.
Non-toxic
Chamomile

Chamomile

Matricaria chamomilla L. (synonyms: Matricaria recutita L., Chamomilla recutita (L.) Rauschert, Matricaria courrantiana DC.)
Non-toxic
Chaste Tree

Chaste Tree

Vitex agnus-castus L.
Non-toxic
Chives

Chives

Allium schoenoprasum
Low
Cilantro

Cilantro

Coriandrum sativum
Non-toxic
Clustered Dock

Clustered Dock

Rumex conglomeratus Murray
Low
Coltsfoot

Coltsfoot

Tussilago farfara L.
Low
Common Bilberry

Common Bilberry

Vaccinium myrtillus L.
Non-toxic
Common Bluebell

Common Bluebell

Hyacinthoides non-scripta (L.) Chouard ex Rothm.
Moderate
Common Evening-Primrose

Common Evening-Primrose

Oenothera biennis aggr. (synonyms: Oenothera biennis L., Oenothera fallax Renner, Oenothera glazioviana Micheli, Oenothera lamarckiana auct., Oenothera erythrosepala Borbás, Oenothera pycnocarpa G.F.Atk. & Bartlett, Oenothera stucchii Soldano)
Non-toxic
Common Fig

Common Fig

Ficus carica L.; Ficus caprificus Risso
Low
Common Hogweed

Common Hogweed

Heracleum sphondylium L.s.l.
Moderate
Common Lilac

Common Lilac

Syringa vulgaris L.
Low
Common Snowdrop

Common Snowdrop

Galanthus nivalis L.
Moderate
Common Walnut

Common Walnut

Juglans regia L.
Low
Common comfrey

Common comfrey

Symphytum officinale L.
Low
Common dandelion

Common dandelion

Taraxacum officinale aggr.
Non-toxic
Common grape hyacinth

Common grape hyacinth

Muscari botryoides (L.) Mill.
Non-toxic
Common groundsel

Common groundsel

Senecio vulgaris L.
Unspecified
Common hawthorn

Common hawthorn

Crataegus monogyna Jacq.
Non-toxic
Common hazel

Common hazel

Corylus avellana L.; Corylus avellana 'Aurea'; Corylus avellana 'Contorta'; Corylus avellana 'Fuscorubra'; Corylus avellana 'Heterophylla'; Corylus avellana 'Pendula'
Non-toxic
Common heather

Common heather

Calluna vulgaris (L.) Hull (syn. Erica vulgaris L.)
Low
Common leadwort

Common leadwort

Plumbago europaea L.
Non-toxic
Common lime (European linden)

Common lime (European linden)

Tilia x europaea L.
Non-toxic
Common mallow

Common mallow

Malva sylvestris L.; Malva mauritiana L. (syn. Malva sylvestris subsp. mauritiana (L.) Boiss. ex Court)
Non-toxic
Common sainfoin

Common sainfoin

Onobrychis viciifolia Scop. (syn. Onobrychis sativa Lam.)
Non-toxic
Common sorrel

Common sorrel

Rumex acetosa L.
Low
Common toadflax

Common toadflax

Linaria vulgaris Mill.
Non-toxic
Common tormentil

Common tormentil

Potentilla erecta (L.) Räuschel; syn. Potentilla tormentilla Necker
Non-toxic
Corn mint

Corn mint

Mentha arvensis L.
Non-toxic
Cow parsley

Cow parsley

Anthriscus sylvestris (L.) Hoffm.
Non-toxic
Cowslip

Cowslip

Primula veris L.s.l.
Non-toxic
Cretan brake fern

Cretan brake fern

Pteris cretica L.
Non-toxic
Curly Dock

Curly Dock

Rumex crispus L.
Low
Cypress spurge

Cypress spurge

Euphorbia cyparissias L.
High
Daphne willow

Daphne willow

Salix daphnoides Vill.
Low
Dog rose

Dog rose

Rosa canina L.
Non-toxic
Downy Oak

Downy Oak

Quercus pubescens Willd. (syn. Quercus lanuginosa Thuill.)
Moderate
Downy birch

Downy birch

Betula pubescens Ehrh.
Non-toxic
Dwarf Elder

Dwarf Elder

Sambucus ebulus L.
Moderate
Dwarf Mallow

Dwarf Mallow

Malva neglecta Wallr.
Non-toxic
Dwarf morning-glory

Dwarf morning-glory

Convolvulus tricolor L.
Moderate
Dyer's broom

Dyer's broom

Genista tinctoria L.
High
Elecampane

Elecampane

Inula helenium L.
Non-toxic
English Hawthorn

English Hawthorn

Crataegus laevigata
Non-toxic
English Oak

English Oak

Quercus robur L. (syn. Quercus pedunculata Ehrh.)
Moderate
English Yew

English Yew

Taxus baccata
Severe
European Bittersweet

European Bittersweet

Solanum dulcamara
Low
European Holly

European Holly

Ilex aquifolium
Low
European columbine

European columbine

Aquilegia vulgaris L.
Low
European goldenrod

European goldenrod

Solidago virgaurea L.s.l., Solidago virgaurea L. subsp. virgaurea, Solidago virgaurea subsp. minuta (L.) Arcang., Solidago alpestris W. & K.
Non-toxic
European heliotrope

European heliotrope

Heliotropium europaeum L.
Unspecified
European larch

European larch

Larix decidua Mill., Larix europaea DC.
Non-toxic
European peony

European peony

Paeonia officinalis L.; Paeonia femina Deesf.; Paeonia peregrina Koch.
Low
European spindle

European spindle

Euonymus europaeus L.
High
European white waterlily

European white waterlily

Nymphaea alba L.
Moderate
Fennel

Fennel

Foeniculum vulgare
Non-toxic
Fenugreek

Fenugreek

Trigonella foenum-graecum L.
Non-toxic
Feverfew

Feverfew

Tanacetum parthenium (L.) Schultz Bip.
Low
Field bindweed

Field bindweed

Convolvulus arvensis L.
Unspecified
Field maple

Field maple

Acer campestre L.
Non-toxic
Forking larkspur

Forking larkspur

Consolida regalis Gray (syn. Delphinium consolida L.)
High
Foxglove

Foxglove

Digitalis purpurea
Severe
Garden asparagus

Garden asparagus

Asparagus officinalis L.; Asparagus caspius Hohen.; Asparagus longifolius Fisch. ex Steud.; Asparagus polyphyllus Steven ex Ledeb.
Non-toxic
Giant hogweed

Giant hogweed

Heracleum mantegazzianum Sommier & Levier
Moderate
Goat willow

Goat willow

Salix caprea L.
Low
Gold moss

Gold moss

Sedum acre L.
Low
Golden chervil

Golden chervil

Chaerophyllum aureum L.
Non-toxic
Grape vine

Grape vine

Vitis vinifera L.
Non-toxic
Grass pea

Grass pea

Lathyrus sativus L.
Low
Great yellow gentian

Great yellow gentian

Gentiana lutea L.
Non-toxic
Greater Plantain

Greater Plantain

Plantago major L. (synonyms: Plantago major subsp. intermedia, Plantago intermedia, Plantago nana)
Low
Greater celandine

Greater celandine

Chelidonium majus L.
High
Greater musk-mallow

Greater musk-mallow

Malva alcea L.
Non-toxic
Greater yellow rattle

Greater yellow rattle

Rhinanthus alectorolophus (Scop.) Pollich
Low
Greater yellow-rattle

Greater yellow-rattle

Rhinanthus angustifolius C.C.Gmel.
Low
Green hellebore

Green hellebore

Helleborus viridis L.
Severe
Green spurge

Green spurge

Euphorbia esula L.
High
Grey willow

Grey willow

Salix cinerea L.
Low
Ground ivy

Ground ivy

Glechoma hederacea L.s.l.
Not provided
Guelder Rose

Guelder Rose

Viburnum opulus L.
Moderate
Gypsywort

Gypsywort

Lycopus europaeus L.s.l.; Lycopus aquaticus Moench
Non-toxic
Hardy Baby Tears

Hardy Baby Tears

Sedum album
Non-toxic
Hedge bindweed

Hedge bindweed

Calystegia sepium (L.) R.Br. (synonym: Convolvulus sepium L.)
Low
Hoary Alyssum

Hoary Alyssum

Berteroa incana
Non-toxic
Hoary plantain

Hoary plantain

Plantago media L.
Low
Holm Oak

Holm Oak

Quercus ilex L. (syn. Quercus sempervirens Mill.)
Moderate
Hops

Hops

Humulus lupulus
Unknown
Horse Chestnut

Horse Chestnut

Aesculus hippocastanum L.; Synonyms: Hippocastanum aesculus Cav., Hippocastanum vulgare Gaertn.
High
Horse mint

Horse mint

Mentha longifolia (L.) Huds. (synonym: Mentha sylvestris L.)
Non-toxic
Horseradish

Horseradish

Armoracia rusticana P.Gaertn. & al.; Armoracia lapathifolia Gilib.
Low
Houndstongue

Houndstongue

Cynoglossum officinale L.
High
Hyssop loosestrife

Hyssop loosestrife

Lythrum hyssopifolia L.
Low
Italian arum

Italian arum

Arum italicum Mill.
High
Italian maple

Italian maple

Acer opalus Mill.
Non-toxic
Japanese Pittosporum

Japanese Pittosporum

Pittosporum tobira
Low
Japanese larch

Japanese larch

Larix kaempferi (Lamb.) Carriere; Larix leptolepis (Siebold & Zucc.) Gordon
Non-toxic
Japanese snowball

Japanese snowball

Viburnum plicatum Thunb.
Moderate
Jimson Weed

Jimson Weed

Datura stramonium L.
Severe
Juniper

Juniper

Juniperus communis L.s.l.
Moderate
Large-leaved linden

Large-leaved linden

Tilia platyphyllos Scop. (syn. Tilia grandifolia Ehrh.)
Non-toxic
Large-leaved lupine

Large-leaved lupine

Lupinus polyphyllus Lindl.
Moderate
Laurustinus

Laurustinus

Viburnum tinus L.
Moderate
Lavender

Lavender

Lavandula angustifolia Mill. (synonyms: Lavandula officinalis Chaix, Lavandula spica L., Lavandula vera DC.)
Non-toxic
Lemon Balm

Lemon Balm

Melissa officinalis
Non-toxic
Lenten Rose

Lenten Rose

Helleborus niger
High
Lesser Clubmoss

Lesser Clubmoss

Selaginella helvetica (L.) Spring
Non-toxic
Maidenhair Tree

Maidenhair Tree

Ginkgo biloba L.
Moderate
Male fern

Male fern

Dryopteris filix-mas (L.) Schott; Aspidium filix-mas (L.) Sw.; Polypodium filix-mas L.
Moderate
Marjoram

Marjoram

Origanum majorana
Non-toxic
Martagon Lily

Martagon Lily

Lilium martagon L.
Non-toxic
Meadow Saffron

Meadow Saffron

Colchicum autumnale
Severe
Meadow clary

Meadow clary

Salvia pratensis L.
Low
Meadowsweet

Meadowsweet

Filipendula ulmaria (L.) Maxim. (syn. Spiraea ulmaria L., Ulmaria pentapetala Gilib.)
Non-toxic
Mediterranean cypress

Mediterranean cypress

Cupressus sempervirens L.
Moderate
Milk thistle

Milk thistle

Silybum marianum (L.) Gaertn.; Carduus marianus L.; Silybum maculatum (Scop.) Moench
Moderate
Mistletoe

Mistletoe

Viscum album L.s.l.
Low
Monk's-rhubarb

Monk's-rhubarb

Rumex alpinus L.
Low
Monkshood

Monkshood

Aconitum napellus aggr.
Severe
Motherwort

Motherwort

Leonurus cardiaca L.
Non-toxic
Mountain Pine

Mountain Pine

Pinus mugo Turra s.l.
Low
Mugwort

Mugwort

Artemisia vulgaris L.
Low
Musk mallow

Musk mallow

Malva moschata L.
Non-toxic
Narrow-leafed lupine

Narrow-leafed lupine

Lupinus angustifolius L.
Low
Narrow-leaved ragwort / South African ragwort

Narrow-leaved ragwort / South African ragwort

Senecio inaequidens DC.
Unspecified
Norway maple

Norway maple

Acer platanoides L.
Non-toxic
Norway spruce

Norway spruce

Picea abies (L.) H.Karst. (synonym: Picea excelsa Link)
Low
Old man's beard

Old man's beard

Clematis vitalba L.
Moderate
Orange daylily

Orange daylily

Hemerocallis fulva (L.) L.
Non-toxic
Orange lily

Orange lily

Lilium bulbiferum L.s.l.
Non-toxic
Oregano (Greek Oregano)

Oregano (Greek Oregano)

Origanum vulgare hirtum
Low
Parsley

Parsley

Petroselinum crispum
Non-toxic
Parsnip

Parsnip

Pastinaca sativa L.s.l.; Pastinaca sativa L.s.str.; Pastinaca sativa L. subsp. sativa; Pastinaca sativa subsp. urens (Godr.) Celak.; Pastinaca sativa subsp. sylvestris (Mill.) Rouy & E.G. Camus
Low
Pennyroyal

Pennyroyal

Mentha pulegium L.
Moderate
Perennial ryegrass

Perennial ryegrass

Lolium perenne L.
Non-toxic
Persian cyclamen

Persian cyclamen

Cyclamen persicum Mill.
Moderate
Petty spurge

Petty spurge

Euphorbia peplus L.
High
Portugal laurel

Portugal laurel

Prunus lusitanica L.
Moderate
Pot Marigold

Pot Marigold

Calendula officinalis
Non-toxic
Potato

Potato

Solanum tuberosum L.
High
Purple loosestrife

Purple loosestrife

Lythrum salicaria L.
Non-toxic
Red bryony

Red bryony

Bryonia dioica Jacq.; Bryonia cretica L. subsp. dioica (Jacq.) Tutin
Severe
Red clover

Red clover

Trifolium pratense L.s.l.
Non-toxic
Red elderberry

Red elderberry

Sambucus racemosa L.
Moderate
Red pea

Red pea

Lathyrus cicera L.
Low
Ribwort Plantain

Ribwort Plantain

Plantago lanceolata L.
Low
Rosemary

Rosemary

Rosmarinus officinalis
Non-toxic
Rough horsetail

Rough horsetail

Equisetum hyemale L.
Low
Rowan

Rowan

Sorbus aucuparia L.; Synonym: Pyrus aucuparia (L.) Gaertn.
Low
Saffron Crocus

Saffron Crocus

Crocus sativus L.
Moderate
Sage

Sage

Salvia officinalis
Low
Sand plantain

Sand plantain

Plantago arenaria Waldst. & Kit.
Low
Savin juniper

Savin juniper

Juniperus sabina L.
Severe
Scots pine

Scots pine

Pinus sylvestris L.
Low
Scouring Rush

Scouring Rush

Equisetum arvense
Unknown
Sea Squill

Sea Squill

Drimia maritima (L.) Stearn (synonyms: Scilla maritima L., Urginea maritima (L.) Baker)
Severe
Sheep sorrel

Sheep sorrel

Rumex acetosella L.s.L
Low
Shrubby Jasmine

Shrubby Jasmine

Jasminum fruticans L.
Non-toxic
Shrubby plantain

Shrubby plantain

Plantago sempervirens Crantz
Low
Silver birch

Silver birch

Betula pendula Roth; Betula verrucosa Ehrh.; Betula alba L.
Non-toxic
Silver fir

Silver fir

Abies alba Mill.; Abies pectinata (Lam.) DC.
Moderate
Silver linden

Silver linden

Tilia tomentosa Moench
Non-toxic
Silver ragwort

Silver ragwort

Jacobaea maritima (L.) Pelser & Meijden
High
Small-flowered mallow

Small-flowered mallow

Malva parviflora L.
Non-toxic
Small-leaved Linden

Small-leaved Linden

Tilia cordata Mill. (synonyms: Tilia ulmifolia Scop., Tilia parvifolia Ehrh.)
Non-toxic
Snow-on-the-mountain spurge

Snow-on-the-mountain spurge

Euphorbia marginata Pursh
High
Snowy Mespilus (Serviceberry)

Snowy Mespilus (Serviceberry)

Amelanchier ovalis Medik.; Aronia rotundifolia Pers.
Low
Soft rush

Soft rush

Juncus effusus L., Juncus effusus 'Spiralis'
Non-toxic
Solomon's seal

Solomon's seal

Polygonatum multiflorum (L.) All.
Moderate
Spanish bluebell

Spanish bluebell

Hyacinthoides hispanica (Mill.) Rothm.
Moderate
Spanish fir

Spanish fir

Abies pinsapo Boiss.
Moderate
Spearmint

Spearmint

Mentha spicata L. (synonym: Mentha viridis L.)
Non-toxic
Spiny restharrow

Spiny restharrow

Ononis spinosa L.
Non-toxic
Spotted dead-nettle

Spotted dead-nettle

Lamium maculatum (L.) L.
Non-toxic
St. John’s Wort

St. John’s Wort

Hypericum perforatum
Low
Stinging nettle

Stinging nettle

Urtica dioica L.
Non-toxic
Stinking hellebore

Stinking hellebore

Helleborus foetidus L.
Severe
Sun spurge

Sun spurge

Euphorbia helioscopia L.
High
Sweet Pea

Sweet Pea

Lathyrus latifolius
Low
Sweet Pea

Sweet Pea

Lathyrus odoratus L.
Low
Sycamore maple

Sycamore maple

Acer pseudoplatanus L.
Unknown
Tall goldenrod

Tall goldenrod

Solidago gigantea Aiton
Non-toxic
Tansy

Tansy

Tanacetum vulgare L.; Chrysanthemum vulgare (L.) Bernh.
Moderate
Tassel hyacinth

Tassel hyacinth

Muscari comosum (L.) Mill. (syn. Leopoldia comosa (L.) Parl., Hyacinthus comosus L.)
Non-toxic
Tasteless stonecrop

Tasteless stonecrop

Sedum sexangulare L.
Non-toxic
Thick-leaf stonecrop

Thick-leaf stonecrop

Sedum dasyphyllum L.; Sedum glaucum Lam.
Non-toxic
Thyme

Thyme

Thymus vulgaris
Non-toxic
Tree aeonium

Tree aeonium

Aeonium arboreum (L.) Webb & Berthel.
Non-toxic
Tuberous pea

Tuberous pea

Lathyrus tuberosus L.
Low
Valerian

Valerian

Valeriana officinalis aggr.
Non-toxic
Vervain

Vervain

Verbena officinalis L.
Low
Virginia Creeper

Virginia Creeper

Parthenocissus inserta (A.Kern.) Fritsch
Low
Virginia creeper

Virginia creeper

Parthenocissus quinquefolia (L.) Planch.; Parthenocissus pubescens (Schlt.) Graebn.
Low
Water fennel

Water fennel

Oenanthe aquatica (L.) Poir.
High
Water horsetail

Water horsetail

Equisetum fluviatile L.; Equisetum limosum L.
Low
Water mint

Water mint

Mentha aquatica L.
Non-toxic
Water-hemlock

Water-hemlock

Cicuta virosa L.
Severe
Wayfaring tree

Wayfaring tree

Viburnum lantana L.
Moderate
White Sweet Clover

White Sweet Clover

Melilotus albus Medik.
Low
White bryony

White bryony

Bryonia alba L.
Severe
White clover

White clover

Trifolium repens L.s.l.
Non-toxic
White dead-nettle

White dead-nettle

Lamium album L.
Non-toxic
White hellebore

White hellebore

Veratrum album L.s.l.
Severe
White lupine

White lupine

Lupinus albus L. (syn. Lupinus sativus Gaertn.)
Moderate
White swallow-wort

White swallow-wort

Vincetoxicum hirundinaria Medik.
Moderate
Wild pansy

Wild pansy

Viola tricolor aggr.; Viola tricolor L.; Viola saxatilis F.W.Schmidt; Viola alpestris (DC.) Jord; Viola arvensis Murray; Viola kitaibeliana Schult.
Moderate
Willow Herb

Willow Herb

Epilobium angustifolium
Non-toxic
Winged broom

Winged broom

Genista sagittalis L.
High
Wood anemone

Wood anemone

Anemone nemorosa L.
Moderate
Wood sorrel

Wood sorrel

Oxalis acetosella L.
Moderate
Woodland crocus

Woodland crocus

Crocus tommasinianus Herb.
Moderate
Woolly yarrow

Woolly yarrow

Achillea tomentosa L.
Non-toxic
Yarrow

Yarrow

Achillea millefolium
Non-toxic
Yellow Pine

Yellow Pine

Pinus ponderosa
Low
Yellow lupin

Yellow lupin

Lupinus luteus L.
Low
Yellow rattle

Yellow rattle

Rhinanthus minor L., Rhinanthus crista-galli L.
Low
Yellow water-lily

Yellow water-lily

Nuphar lutea (L.) Sm. (synonym: Nymphaea lutea L.)
Moderate

Alsike Clover

Trifolium hybridum
Unknown

Big-flowered Foxglove

Digitalis grandiflora Mill.
Severe

Bitter vetch

Lathyrus linifolius (Reichard) Bässler
Non-toxic

Bitter willow

Salix elaeagnos Scop.
Low

Black Cumin

Nigella sativa L.
Non-toxic

Black Pine

Pinus nigra J.F.Arnold
Low

Bulbous buttercup

Ranunculus bulbosus L.
High

Chinese Aconite

Aconitum carmichaelii Debeaux
Severe

Clematis

Clematis-Hybride
Moderate

Clustered-grape-hyacinth

Muscari racemosum (L.) Mill.
Non-toxic

Common agrimony

Agrimonia eupatoria L.
Non-toxic

Common blanketflower

Gaillardia aristata Pursh; Gaillardia bicolor var. aristata (Pursh) Nutt.
Non-toxic

Common centaury

Centaurium erythraea Rafn
Non-toxic

Common lady's mantle

Alchemilla vulgaris L.; Alchemilla xanthochlora aggr.; Alchemilla pratensis auct.
Non-toxic

Corn buttercup

Ranunculus arvensis L.
Low

Corncockle

Agrostemma githago L.
High

Crack willow

Salix fragilis L.
Low

Creeping buttercup

Ranunculus repens L.
Low

Crown Vetch

Securigera varia (L.) Lassen (syn. Coronilla varia L.)
Moderate

Cursed buttercup

Ranunculus sceleratus L.
High

Doubtful knight's spur

Consolida ajacis (L.) Schur; Delphinium ajacis L.
Moderate

Erect clematis

Clematis recta L.
Moderate

European buckthorn

Rhamnus catharticus L.
High

European eyebright

Euphrasia stricta J.F.Lehm, Euphrasia ericetorum Jord.
Low

Eyebright

Euphrasia rostkoviana Hayne s.l.; Euphrasia officinalis L.
Low

Fen ragwort

Senecio paludosus L.
High

Field marigold

Calendula arvensis L.
Non-toxic

Figwort

Ranunculus acris
Moderate

Flat pea

Lathyrus sylvestris L.
Low

Fool's parsley

Aethusa cynapium L.
Moderate

Fragrant agrimony

Agrimonia procera Wallr.; Agrimonia odorata auct.
Non-toxic

Garden Angelica

Angelica archangelica L., Angelica officinalis Hoffm.
Moderate

German greenweed

Genista germanica L.
High

Great horsetail

Equisetum telmateia Ehrh., Equisetum maximum auct.
Low

Great spearwort

Ranunculus lingua L.
Low

Greek Sage

Salvia triloba L.; Salvia fruticosa Mill.
Low

Hairy buttercup

Ranunculus sardous Crantz, Ranunculus philonotis Retz
Low

Hard shield-fern

Polystichum aculeatum (L.) Roth
Low

Herb Christopher

Actaea spicata L.
Non-toxic

Herb Paris

Paris quadrifolia L.
Moderate

Hoary ragwort

Senecio erucifolius L.; Jacobaea erucifolia (L.) P.Gaertn., B.Mey. & Scherb.
High

Hoary willowherb

Epilobium parviflorum Schreb.
Non-toxic

Iceland moss

Cetraria islandica (L.) Ach. (syn. Lichen islandicus L.)
Non-toxic

Imperforate St. John's-wort

Hypericum maculatum Crantz s.l.
Low

Japanese Holly Fern

Cyrtomium fortunei J.Sm.
Low

Lady's-slipper orchid

Cypripedium calceolus L.
Non-toxic

Lesser celandine

Ranunculus ficaria L.; Ficaria verna Huds.
Low

Lesser spearwort

Ranunculus flammula L.
High

Licorice

Glycyrrhiza glabra L.
Low

Lingonberry

Vaccinium vitis-idaea L.
Non-toxic

Male Peony

Paeonia mascula (L.) Mill.; Paeonia corallina Retz.
Low

Marsh horsetail

Equisetum palustre L.
Low

Marsh ragwort

Senecio aquaticus Hill
Moderate

Marsh spurge

Euphorbia palustris L.
High

Meadow horsetail

Equisetum pratense Ehrh.
Low

Meadow vetchling

Lathyrus pratensis L.
Non-toxic

New York aster

Symphyotrichum novi-belgii (L.) G.L.Nesom (syn. Aster novi-belgii L.)
Non-toxic

Noble yarrow

Achillea nobilis L.
Non-toxic

Northern wolfsbane

Aconitum lycoctonum L.s.l./L.s.str., Aconitum vulparia aggr./Rchb.s.str., Aconitum lycoctonum subsp. neapolitanum (Ten.) Nyman, Aconitum lycoctonum subsp. vulparia (Rchb.) Nyman, Aconitum altissimum Mill./Mill.p.p., Aconitum lamarckii Rchb., Aconitum ranunculifolium Rchb., Aconitum pyrenaicum L., Aconitum x platanifolium Degen & Gáyer, Aconitum penninum (Ser.) Gáyer
Severe

Oxlip

Primula eliator (L.) L.s.str.
Non-toxic

Patience Dock

Rumex patentia L.
Low

Pheasant's eye

Adonis vernalis L.
High

Poison Hemlock

Conium maculatum
Severe

Purple Osier Willow

Salix purpurea
Non-toxic

Ragwort

Senecio jacobaea L. (syn. Jacobaea vulgaris L.)
Moderate

Rattle

Rhinanthus glacialis Personnat
Low

Rough Chervil

Chaerophyllum temulum L.
Moderate

Scree saxifrage

Saxifraga androsacea L.
Non-toxic

Sessile oak

Quercus petraea (Matt.) Liebl.
Moderate

Small cranberry

Vaccinium microcarpum (Rupr.) Schmalh.
Non-toxic

Small cranberry

Vaccinium oxycoccos L. (synonyms: Oxycoccus palustris Pers., Oxycoccus quadripetalus Gilib.)
Non-toxic

Small yellow foxglove

Digitalis lutea L.
Severe

Small yellow pond-lily

Nuphar pumila (Timm) DC.
Moderate

Spring crocus

Crocus albiflorus Kit.; Crocus vernus (L.) Hill subsp. albiflorus (Kit.) Asch. & Gr.
Moderate

Spring vetchling

Lathyrus vernus (L.) Bernh.s.l.; Lathyrus vernus subsp. gracilis (Gaudin) Arcang.; Lathyrus vernus subsp. flaccidus Arcang.
Non-toxic

St. Peter's Wort

Hypericum tetrapterum Fr. (syn. Hypericum acutum Moench)
Low

Summer pheasant's-eye

Adonis aestivalis L.
High

Tall fescue

Lolium arundinaceum (Schreb.) Darbysh.
Non-toxic

Tall yellow sweetclover

Melilotus altissimus Thuill.
Low

Tar spot

Rhytisma acerinum (Pers.) Fr.
Non-toxic

Turkey Oak

Quercus cerris L.
Low

Variegated horsetail

Equisetum variegatum Schleich.
Low

Variegated monk's hood

Aconitum variegatum L.s.l.
Severe

Viper's Bugloss

Echium vulgare
Low

Wake Robin

Arum maculatum
High

Waterfennel

Oenanthe fistulosa L.
High

Waterfennel, Water Dropwort

Oenanthe lachanalii C.C.Gmel.
High

Wild angelica

Angelica sylvestris L.
Moderate

Wild bishop

Bifora radians
Non-toxic

Winter heath

Erica carnea L.; Erica herbacea L.; Erica mediterranea L.
Low

Wood horsetail

Equisetum sylvaticum L.
Low

Woolly foxglove

Digitalis lanata Ehrh.
Severe

Yellow Monkshood

Aconitum anthora L.
Severe

Yellow Sweet Clover

Melilotus officinalis Lam., Melilotus arvensis Wallr.
Low

Yellow azalea

Rhododendron luteum Sweet; synonyms: Rhododendron flavum G. Don, Azalea pontica L.
High
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