May Wild Flower Records
Hamilton, Ontario, Canada
Updated to May 31, 2009

I am updating Latin names from "FLORA Ontario – Integrated Botanical Information System"
as I find errors in my older records.
Here are records of 267 wild or naturalized species found in bloom
in May during the last 11 years in the Hamilton Area.
* = Plant is not native to our area.

ENGLISH NAMES Latin Names French Names
Alexanders, Golden Zizia aurea Zizia doré
Alyssum, Small * Alyssum alyssoides Alysson calicinal
Anemone, Rue Thalictrum thalictroides Anémone fauxpigamon
Anemone, Wood Anemone quinquefolia Anémone à cinq folioles
Aniseroot Osmorhiza longistylis Osmorhize à long style
Apple *(tree) Malus pumila Pommier nain
Ash, Blue (Tree) Fraxinus quadrangulata Frêne anguleux
Asparagus * Asparagus officinalis Asperge
Aspen, Large-Toothed (Tree) Populus grandidentata Peuplier à grandes dents
Aspen, Trembling (Tree) Populus tremuloides Peuplier faux-tremble
Avens, Yellow Geum aleppicum Benoîte d'Alep
Baneberry, Red Actaea rubra Actée rouge
Baneberry, White Actaea pachypoda Actée à gros pédicelles
Barberry, Common * (Shrub) Berberis vulgaris Épine-vinette commune
Barberry, Japanese * (Shrub) Berberis thunbergii Épine-vinette du japon
Beardtongue, Foxglove (White) Penstemon digitalis Penstémon digitale
Bedstraw, Rough Galium asprellum Gaillet piquant
Beech, American (Tree) Fagus grandifolia Hêtre à grandes feuilles
Beech, Blue (Tree) Carpinus caroliniana Charme de caroline
Bellwort, Large-Flowered Uvularia grandiflora Uvulaire grandiflore
Bellwort, Perfoliate Uvularia perfoliata Uvulaire perfoliée
Birch, White (Tree) Betula papyrifera Bouleau à papier
Bittercress, Hairy * Cardamine hirsuta Cardamine hirsute
Bladdernut, American (Shrub) Staphylea trifolia Staphylier à trois folioles
Bloodroot Sanguinaria canadensis Sanguinaire du Canada
Blue Flag, Slender * Iris prismatica Iris prismatique
Bluebells, Virginia Mertensia virginica Mertensia de Virginie
Blueberry, Early Low Vaccinium angustifolium Airelle à feuilles étroites
Blue-Eyed Grass, Common Sisyrinchium montanum Bermudienne montagnarde
Buckthorn, Common * (Tree) Rhamnus cathartica Nerprun cathartique
Bugle * Ajuga reptans Bugle rampante
Butterbur * Petasites japonicus Pétasite du japon
Buttercup, Creeping * Ranunculus repens Renoncule rampante
Buttercup, Early Ranunculus fascicularis Renoncule fasciculée
Buttercup, Hispid Ranunculus hispidus Renoncule hispide
Buttercup, Kidneyleaf Ranunculus abortivus Rallonge coudée
Buttercup, Swamp Ranunculus hispidus var. caricetorum  
Buttercup, Tall * Ranuculus acris Renoncule âcre
Calla, Wild Calla palustris Calla des marais
Campion, Bladder * Silene vulgaris Silène enflé
Campion, Red * Silene dioica Compagnon rouge
Campion, White (Evening Lychis) * Silene latifolia Silène à larges feuilles
Cancerroot, One-Flowered Orobanche uniflora Orobanche uniflore
Celandine * Chelidonium majus Grande chélidoine
Celandine, Lesser * Ranunculus ficaria Renoncule ficaire
Celendine-poppy Stylophorum diphyllum Stylophore à deux feuilles
Charlock * Sinapis arvensis Moutarde d`été
Cherry, Choke (Shrub) Prunus virginiana Cerisier à grappes
Cherry, Pin Prunus pensylvanica Cerisier de Pennsylvanie
Chervil, Bur Anthriscus caucalis Anthrisque commun
Chestnut, Horse (Tree) Aesculus hippocastanum Marronnier d'Inde
Chickweed, Common * Stellaria media Stellaire moyenne
Chickweed, Jagged * Holosteum umbellatum Holostée à ombrelle
Chickweed, Mouse-Ear * Cerastium fontanum Céraiste vulgaire
Cicely, Sweet Osmorhiza claytoni Osmorhize de clayton
Cinquefoil, Common Potentilla simplex Potentille simple
Cinquefoil, Rough Potentilla norvegica ssp.monspeliensis Potentille de Norvège
Cinquefoil, Rough-Fruited * Potentilla recta Potentille dressée
Cinquefoil, Silvery * Potentilla argentea Potentille argentée
Clearweed Pilea pumila Piléa nain ou petite ortie
Cleavers Galium aparine Gaillet gratteron
Clover, Alsike * Trifolium hybridum ssp.elegans Trèfle alsike
Clover, Red * Trifolium pratense Trèfle rouge
Clover, White * Trifolium repens Trèfle blanc
Cohosh, Blue Caulophyllum thalictroides Caulophylle
Coltsfoot * Tussilago farfara Tussilage pas d'âne
Columbine, Garden * Aquilegia vulgaris Ancolie
Columbine, Wild Aquilegia canadensis Ancolie du Canada
Comfrey, Common * Symphytum officinale ssp.officinale Consoude officinale
Corydalis, Golden Corydalis aurea Corydale dorée
Cranberry, Highbush (Shrub) Viburnum trilobum Viorne trilobée
Cress, Hairy Rock Arabis hirsuta ssp pycnocarpa Arabette hirsute
Cress, Mouse-Ear * Arabidopsis thaliana Fausse arabette des dames
Cress, Purple (Pink Spring Cress) Cardamine douglassii Cardamine de douglas
Cress, Smooth Rock Arabis laevigata Arbarette lisse
Cress, Spring Cardamine bulbosa Cardamine bulbeuse
Crowfoot, Cursed Ranunculus sceleratus Renoncule scélérate
Crowfoot, Hooked Ranunculus recurvatus Renoncule recourbée
Currant, Buffalo * (Shrub) Ribes odoratum Groseillier odorant
Currant, Wild Black (Shrub) Ribes americanum Gadellier noir
Current, Garden (Shrub) Ribes rubrum Groseillier rouge
Daisy, Oxeye * Leucanthemum  vulgare Marguerite blanche
Dandelion, Common * Taraxacum officiale Pissenlit officinal
Dandelion, Marsh * Taraxacum palustre Pissenlit des marais
Dandelion, Red-Seeded * Taraxacum erythrospermum Pissenlit à graines rouges
Dead-Nettle, Purple * Lamium purpureum Lamier pourpre
Dead-Nettle, Spotted * Lamium maculatum Lamier maculé
Dock, Curled * Rumex crispus Patience crépue
Dogwood, Alterate-Leaved (Tree) Corus alterifolia Cornouiller à feuilles alternes
Dogwood, Flowering (Tree) Cornus florida Cornouiller fleuri
Dogwood, Gray (Shrub) Cornus racemosa Cornouiller à grappes
Dogwood, Red-Osier (Shrub) Cornus  sericea ssp. sericea Cornouiller stolonifère
Dutchman's Breeches Dicentra cucullaria Dicentre à capuchon
Elder, Red-Berried Sambucus rasemosa ssp  pubens Sureau rouge du pacifique
False Mermaid Floerkea proserpinacoides Floerkée fausse-proserpinie
Fleabane, Common
 		 Erigeron philadelphicus var. philadelphicus Érigéron de philadelphie
Fleabane, Daisy Erigeron annuus Érigéron annuel
Foamflower Tiarella cordifolia Tiarelle cordifoliée
Forget-Me-Not, Smaller Myosotis laxa Myositis laxiflore
Forget-Me-Not, True * Myosotis scorpioides Myositis des marais
Geranium, Wild Geranium maculatum Géranium maculé
Goatsbeard, Meadow * Tragopogon pratensis ssp.pratensis Salsifis des prés
Goatsbeard, Yellow * Tragopogon dubius Salsifis jaune
Goldthread Coptis trifolia ssp. groenlandica Coptide, savoyante
Gooseberry, Prickly Ribes cynosbati Groseiller des chiens
Grape, Riverbank (Vine) Vitis riparia Vigne des rivages
Ground Ivy * Glechoma hederacea Lierre terrestre
Groundsel, Common * Senecio vulgaris Séneçon vulgaire
Hawkweed, Common * Hieracium lachenalii Épervière vulgaire
Hawkweed, Field * Hieracium caespitosum Épervière des prés
Hawkweed, Glaucous King Devil * Hieracium florentinum Épervière fausse piloselle
Hawthorn species Crataegus (sp) Aubépine
Henbit * Lamium amplexicaule Lamier amplexicaule
Hepatica, Round-Lobed Anemone americana Anémone d'Amérique
Hepatica, Sharp-Lobed Anemone acutiloba Anémone à lobes aigus
Herb Robert * Geranium robertianum Géranium de Robert
Honesty * Lunaria annua Monnaie du pape
Honeysuckle, Amur * (Shrub) Lonicera maackii Chèvrefeuille de maack
Honeysuckle, Glaucous (Shrub) Lonicera dioica Chèvrefeuille dioïque
Honeysuckle, Hairy Lonicera hirsuta Chèvrefeuille hirsute
Honeysuckle, Morrow's * (Shrub) Lonicera morrowi Chèvrefeuille
Honeysuckle, Tartarian * (Shrub) Lonicera tatarica Chèvrefeuille de tartarie
Hop-Hornbeam (Tree) Ostrya virginiana Ostryer de virginie
Horse Gentian, Orange-Fruited Triosteum aurantiacum Trioste orangé
Hound's Tongue * Cynoglossum officinale Cynoglosse officinale
Hyacinth, Grape * Muscari botryoides Muscari botryde
Jack-In-The-Pulpit Arisaema triphyllum Petit-prêcheur
Knotgrass, Common * Polygonum aviculare Renouée des oiseaux
Lady's Slipper , Smaller Yellow Cypripedium parviflorum Sabot de la vierge (petit)
Lady's Slipper, Yellow Cypripedium calceolus pubescens Sabot de la vierge (grand)
Mallow, Common(Cheeses) * Malva neglecta Mauve négligée
Mandarin, Yellow Disporum lanuginosum ( French not found )
Maple, Manitoba (Tree) Acer negundo L. Érable à feuilles composées
Maple, Mountain (Tree) Acer spicatum Érable à épis
Maple, Red (Tree) Acer rubrum Érable rouge
Maple, Sugar (Tree) Acer saccharum var. saccharum Érable à sucre
Marigold, Marsh Caltha palustris Populage des marais
Mayapple Podophyllum peltatum Podophylle pelté
Mayflower, Canada Maianthemum canadense Maïanthème du Canada
Mayweed * Anthemis cotula Camomille puante
Meadow-Rue, Early Thalictrum dioicum Pigamon dioïque
Medick, Black * Medicago lupulina Lupuline
Miterwort Mitella diphylla Mitrelle à deuxfeuilles
Mouse Ear * Hieracium pilosella Épervière piloselle
Mustard, Field * Brassica rapa Chou rave
Mustard, Garlic * Alliaria petiolata Alliaire officinale
Mustard, Wormseed *
 		 Erysimum cheiranthoides ssp. cheiranthoides Vélar fausse giroflée
Nightshade, Bittersweet * Solanum dulcamara Morelle douce-amère
Oak, Pin (Tree) Quercus palustris Chêne des marais
Olive, Autumn * Elaeagnus umbellata Olivier d’automne
Oregon-grape * Mahonia  aquifolium Mahonie à feuilles de houx
Pansy, Field Viola arvensis Violette des champs
Parsley, Cow * Anthriscus sylvestris Anthrisque des bois
Parsnip, Cow Heracleum  maximum Berce laineuse
Pawpaw (Tree) Asimina triloba Asiminier trilobé
Pennycress, Field * Thlaspi arvense Tabouret des champs
Peppergrass, Field * Lepidium campestre Lépidie des champs
Periwinkle * Vinca minor Pervenche mineur
Phlox, Wild Blue Phlox divaricata Phloxdivariqué
Pimpernel, Yellow Taenidia integerrima Ténidia à feuilles entières
Pine, Red Pinus Resinosa Pin rouge
Pine, Scotch Pinus sylvestris Pin sylvestre
Pineapple Weed * Matricaria  discoidea Matricaire odorante
Plantain, English * Plantago lanceolata Plantain lancéolé
Plantain, Robin's Erigeron pulchellus Vergerette délicate
Plum, American (Tree) Prunus americana Prunier d`amérique
Plum, Canada (Tree) Prunus nigra Prunier noir
Pussytoes, Field Antennaria neglecta Antennaire du Canada
Pussytoes, Parlin's Antennaria parlinii ssp. fallaz Antennaire de parlin
Pussytoes, Smaller Rare In H/W Antennaria howellii ssp neodioica Antennaire néodioïque
Ragwort, Golden Senecio aureus Séneçon doré
Raspberry, Black (Thimbleberry) (Shrub) Rubus occidetalis Framboisier noir
Raspberry, Wild Red (Shrub) Rubus idaeus Framboisier sauvage
Redbud (Tree) Cercis canadensis Gainier rouge
Rocket, Dame's * Hesperis matronalis Julienne des dames
Rocket, Yellow * Barbarea vulgaris Barbarée vulgaire
Rose, Smooth (Shrub) Rosa blanda Rosier inerme
Sandwort, Grove Moehringia lateriflora Sabline latériflore
Sandwort, Thyme-Leaved * Arenaria serpyllifolia Sabline à feuilles de serpolet
Sarsaparilla, Wild Aralia nudicaulis Aralie à tige nue
Sassafras (Tree) Sassafras albidum Sassafras officinal
Saxifrage, Early Saxifraga virginiensis Saxifrage de virginie
Saxifrage, Golden Chrysosplenium americanum Dorine d'Amérique
Scorpion-Grass, Blue * Myosotis stricta Myosotis à tiges dressées
Sedge, Broad-leaved Carex platyphylla Carex à larges feuilles
Sedge, Long-stalked Carex pedunculata Carex pédonculé
Sedge, Pennsylvania Carex pensylvanica Carex de Pennsylvanie
Sedge, Plantain-leaved Carex plantaginea Carex plantain
Shadbush, Common (Tree) Amelanchier arborea Amélanchier arborescent
Shadbush, Smooth (Tree) Amelanchier laevis Amélanchier glabre
Shadush Unkown Species (Tree)   Amélanchier
Shepherd's Purse * Capsella bursa-pastoris Bourse-à-pasteur
Silverweed Argentia anserina Potentille ansérine
Snakeroot, Black Sanicula marilandica Sanicle du maryland
Snakeroot, Seneca Polygala senega Polygala sénéca
Snapdragon, Dwarf * Chaenorrhinum minus Chénorhinum mineur
Solomon's Seal, False Maianthemum racemosa ssp. racemosum Fauxsceau de salomon
Solomon's Seal, Hairy Polygonatum pubescens Sceau-de-salomon pubescent
Solomon's Seal, Star-Flowered False Maianthemum stellatum Smilacine étoilée
Sorrel, Sheep * Rumex acetosella Petite oseille
Sow Thistle, Common * Sonchus oleraceus Laiteron potager
Speedwell, Bird's Eye Veronica chamaedrys Véronique de perse
Speedwell, Common * Veronica officialis Véronique officinale
Speedwell, Corn * Veronica arvensis Véronique des champs
Speedwell, Persian * Veronica persica Véronique de perse
Speedwell, Purslane Veronica peregrina Véronique voyageuse
Speedwell, Slender * Veronica filiformis Véronique filiforme
Speedwell, Thyme-Leaved * Veronica serpyllifolia Véronique à feuilles de serpolet
Speedwell, Wayside * Veronica polita Véronique luisante
Spicebush (Shrub) Lindera benzoin Laurier benzoin
Spindle Tree * Euonymus europaea Fusain d'Europe
Spring Beauty, Carolina Claytonia caroliniana Claytonie de caroline
Spring Beauty, Narrow-Leaved Claytonia virginica Claytonie feuille-étroite
Spurge, Cypress * Euphorbia cyparissias Euphorbe cyprès
Spurge, Leafy * Euphorbia esula Euphorbe âcre
Spurge, Petty * Euphorbia peplus Euphorbe des jardins
Squirrel-Corn Dicentra canadensis Dicentre du Canada
Starflower Trientalis borealis Trientale boréale
Stitchwort, Lesser * Stellaria graminea Stellaire graminée
Storksbill * Erodium cicutarium Érodium cicutaire
Strawberry, Barren Waldsteinia fragarioides Waldsteinia faux-fraisier
Strawberry, Field Fragaria virginiana ssp.glauca Fraisier de Virginie
Strawberry, Woodland Fragaria vesca ssp. americana Fraisier des bois
Sumac, Fragrant Rhus aromatica Sumac odorant
Swallowwort * Cynanchum rossicum Cynanche
Sycamore (Tree) Platanus occidentalis Platane occidental
Tamarack (Tree) Larix laricina Mélèze laricin
Thimbleweed Anemone virginiana Anémone de Virginie
Timothy * (Grass) Phleum pratense Fléole des prés
Toadflax, Star Comandra umbellata Comandre à ombrelles
Toothwort(Crinkleroot) Cardamine diphylla Dentaire à 2 feuilles
Toothwort, Cut-Leaved Cardamine concatenata Dentaire
Trefoil, Birdsfoot * Lotus corniculatus Lotier corniculé
Trillium, Red Trillium erectum Trille rouge
Trillium, White Trillium grandiflorum Trille blanc
Trout-Lily Erythronium americanum ssp. americanum Érythrone d'Amérique
Trout-Lily, White Erythronium albidum Érythrone blanc
Twinleaf Jeffersonia diphylla Jeffersonia diphylla
Twisted Stalk, Rose Streptopus roseus Streptope rose
Vetch, Cow * Vicia cracca Vesce jargeau
Vetch, Slender * Vicia tetrasperma Vesce à quatre graines
Vetch, Spring * Vicia sativa ssp nigra Vesce cultivée
Viburnum, Sweet Viburnum lentago Viorne lentago
Violet, Canada Viola canadensis Violette du Canada
Violet, Common Viola sororia Violette parente
Violet, Dog Viola conspersa Violette décombante
Violet, Downy Yellow Viola pubescens Violette pubescente
Violet, Green Hybanthus concolor ( French not found )
Violet, Leconte's Viola affinis Violette affine
Violet, Long-Spurred Viola rostrata Violette rostrée
Violet, Marsh Blue Viola cucullata Violette cucullée
Violet, N.Blue Viola septentrionalis Violette septentrionale
Violet, N.White * Viola odorata Violette odorante
Violet, Selkirk's Viola Selkirkii Violette de selkirk
Violet, Sweet White Viola blanda Violette odorante?
Watercress * Nasturtium officinale Cresson de fontaine
Waterleaf, Virginia Hydrophyllum virginiaum Hydrophylle de Virginie
Whitlow Grass * Erophila verna Drave printanière
Wild Ginger Asarum canadense Asaret du Canada
Willow, Weeping (Tree) Salix x sepulcralis Saule pleureur
Wood Betony Pedicularis canadensis La pédiculaire du Canada
Wood Sorrel, Yellow Oxalis stricta Oxalide d'Europe
Woodrush Luzula multiflora Luzule multiflore
Woodrush, Hairy Luzula acuminata Luzule acuminée
Cultivated Species
Hyacinth * Hyacinthus spp. Jacinthe
Lungwort * Sticta pulmonaria ( French not found )
Tulip * Tulipa spp Tulipe

Dean A. Gugler
Amateur Naturalist

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