Plants blooming in May

A species with no recorded window is listed under no month.

139 plants

Alberta PenstemonPenstemon albertinuswildflower · May-JulAlder-leaved BuckthornEndotropis alnifoliashrub · May-JunAwned SedgeCarex atherodessedge · May-JunBalsam FirAbies balsameatree · May–JuneBalsam PoplarPopulus balsamiferatree · April–MayBalsamrootBalsamorhiza sagittatawildflower · May-JulBasket WillowSalix petiolarisshrub · Apr-MayBastard ToadflaxComandra umbellatawildflower · May–JuneBeaked HazelnutCorylus cornutashrub · April–MayBeaked SedgeCarex rostratasedge · May-JunBearberryArctostaphylos uva-ursigroundcover · May–JuneBebb's SedgeCarex bebbiisedge · May-JunBebb's WillowSalix bebbianatree · April–MayBishop's CapMitella nudagroundcover · May-JunBlack HawthornCrataegus douglasiishrub · May–JuneBlack SprucePicea marianatree · May–JuneBlue ClematisClematis occidentalisvine · May-JunBoreale OxytropisOxytropis borealiswildflower · May-JulyBristly Black CurrantRibes lacustreshrub · May–JuneBuckbeanMenyanthes trifoliataaquatic · May–JuneBur OakQuercus macrocarpatree · MayCanada AnemoneAnemonastrum canadensegroundcover · May-JulyCanada BuffaloberryShepherdia canadensisshrub · MayChokecherryPrunus virginianashrub · May–JuneCommon JuniperJuniperus communisshrub · May–JuneCommon TwinpodPhysaria didymocarpawildflower · April-JuneCreeping JuniperJuniperus horizontalisgroundcover · MayCreeping Oregon GrapeMahonia repensshrub · April-MayCreeping SpikerushEleocharis palustrissedge · May-JulCrowfoot VioletViola pedatifidawildflower · May-JuneDesert Shooting StarPrimula conjugenswildflower · Apr-JunDouglas FirPseudotsuga menziesiitree · Apr-MayDouglas MapleAcer glabrumshrub · Apr-MayDrummond's MilkvetchAstragalus drummondiiwildflower · May-JulDwarf BirchBetula glandulosashrub · May-JunEarly Blue VioletViola aduncagroundcover · May–JuneEarly Yellow OxytropisOxytropis sericeawildflower · May-JuneEastern Red ColumbineAquilegia canadensiswildflower · May-JuneFalse Box (Mountain Boxwood)Paxistima myrsinitesshrub · May–JulyFalse Solomon's SealMaianthemum racemosumwildflower · May-JuneField ChickweedCerastium arvensegroundcover · May-JulyField PussytoesAntennaria neglectagroundcover · May-JuneFragrant SumacRhus aromaticashrub · April-MayFuzzy-tongue PenstemonPenstemon eriantheruswildflower · May-JulGlacier LilyErythronium grandiflorumwildflower · Apr-JunGolden BeanThermopsis rhombifoliawildflower · May–JuneGolden Currant (Buffalo Currant)Ribes aureumshrub · May–JuneGolden DrabaDraba aureawildflower · Apr-JunGolden SedgeCarex aureasedge · May-JunGreen AlderAlnus alnobetulashrub · April-MayGround PlumAstragalus crassicarpuswildflower · May-JuneHeart-leaved Alexanders (Golden Alexanders)Zizia apterawildflower · May–JulyHeart-leaved ArnicaArnica cordifoliawildflower · May-JulyHighbush CranberryViburnum opulusshrub · May-JuneIndigenous RicegrassEriocoma hymenoidesgrass · May-JuneJack PinePinus banksianatree · May-JuneLabrador TeaLedum groenlandicumshrub · May-JulyLakeshore SedgeCarex lacustrissedge · May-JunLodgepole PinePinus contortatree · May-JuneLow BilberryVaccinium myrtillusshrub · May-JuneLow TownsendiaTownsendia exscapawildflower · April-MayMarsh MarigoldCaltha palustriswildflower · May–JuneMarsh VioletViola palustrisgroundcover · May-JuneMeadow ArnicaArnica fulgenswildflower · May–JulyMeadow SedgeCarex praticolasedge · May-JunMissouri MilkvetchAstragalus missouriensiswildflower · May-JuneMoss PhloxPhlox hoodiigroundcover · Apr-JunMountain Sweet CicelyOsmorhiza berteroiherb · May-JulNarrow-leaf WillowSalix exiguashrub · Apr-MayNarrowleaf Cotton-grassEriophorum angustifoliumsedge · May-JunNeedle and Thread GrassHesperostipa comatagrass · May-JunNorthern Black CurrantRibes hudsonianumshrub · May–JunePalmate-leaved ColtsfootPetasites frigidusherb · April-MayPaper BirchBetula papyriferatree · April–MayParry's TownsendiaTownsendia parryiwildflower · May-JunePhiladelphia FleabaneErigeron philadelphicuswildflower · May–JulyPin CherryPrunus pensylvanicatree · MayPink PussytoesAntennaria roseagroundcover · May–JulyPrairie ButtercupRanunculus rhomboideuswildflower · April–MayPrairie CrocusPulsatilla nuttallianawildflower · March-MayPrairie Onion (Textile Onion)Allium textilewildflower · May–JunePrairie TurnipPediomelum esculentumwildflower · May-JunePurple Avens (Water Avens)Geum rivalewildflower · May–JulyPurple Oat GrassSchizachne purpurascensgrass · May-JulyRaymond's SedgeCarex raymondiisedge · May-JunRed BaneberryActaea rubrawildflower · May-JuneRed ColumbineAquilegia formosawildflower · May-JulyRocky Mountain FescueFestuca saximontanagrass · May-JulyRosy Pussytoes (Littleleaf Pussytoes)Antennaria microphyllagroundcover · May–JulyRough-fruited Fairy BellsProsartes trachycarpaherb · May–JuneRound-leaved Yellow VioletViola orbiculatawildflower · May-JunSaline Shooting StarPrimula pauciflorawildflower · May-JunSandbar WillowSalix interiorshrub · Apr-MaySandberg BluegrassPoa secundagrass · Apr-JunSartwell's SedgeCarex sartwelliisedge · May-JunSaskatoon BerryAmelanchier alnifoliashrub · May–JuneShooting StarDodecatheon pulchellumwildflower · May–JuneShort-beaked AgoserisAgoseris parviflorawildflower · May-JulShort-capsuled WillowSalix brachycarpashrub · May-JunShowy Jacob's-ladderPolemonium pulcherrimumwildflower · May-JulShowy PussytoesAntennaria pulcherrimawildflower · May-JulSilver BuffaloberryShepherdia argenteashrub · MaySkunk CurrantRibes glandulosumshrub · May-JunSmall-leaved Everlasting (Small-leaved Pussytoes)Antennaria parvifoliagroundcover · May–JuneSmooth Blue BeardtonguePenstemon nitiduswildflower · May–JuneSmooth Sweet CicelyOsmorhiza longistyliswildflower · May-JunSprengel's SedgeCarex sprengeliisedge · May-JunSpring BeautyClaytonia lanceolataherb · April–MayStar-flowered Solomon's SealMaianthemum stellatumherb · May–JuneTamarackLarix laricinatree · MayThinleaf AlderAlnus incanashrub · April-MayThree Flowered Avens (Prairie Smoke, Old Man's Whiskers)Geum triflorumwildflower · May–JuneTrailing RaspberryRubus pedatusgroundcover · May-JulyTwin ArnicaArnica sororiawildflower · May-JulyVelvet-leaf BlueberryVaccinium myrtilloidesshrub · May–JuneWater BirchBetula occidentalistree · April–MayWestern Blue IrisIris missouriensiswildflower · May-JulyWestern Canada VioletViola canadensiswildflower · May–JulyWestern FescueFestuca occidentalisgrass · May-JulyWestern MeadowrueThalictrum occidentalewildflower · May-JulyWestern Porcupine GrassHesperostipa curtisetagrass · May-JunWhite SprucePicea glaucatree · May–JuneWhite-grained Mountain Rice GrassOryzopsis asperifoliagrass · May-JunWild Black CurrantRibes americanumshrub · Apr-MayWild GooseberryRibes oxyacanthoidesshrub · May–JuneWild Lily-of-the-valleyMaianthemum canadensegroundcover · May–JuneWild Red CurrantRibes tristeshrub · May–JuneWild StrawberryFragaria virginianagroundcover · May–JuneWinterfatKrascheninnikovia lanatashrub · May-JunWoodland StrawberryFragaria vescagroundcover · May–JuneWoolly GroundselPackera canawildflower · May–JuneWoolly SedgeCarex pellitasedge · May-JulYellow BeardtonguePenstemon confertuswildflower · May-JulYellow Lady's SlipperCypripedium parviflorumwildflower · May-JunYellow Mountain AvensDryas drummondiigroundcover · May-JulyYellow PaintbrushCastilleja lutescenswildflower · May-JulyYellow PucoonLithospermum ruderalewildflower · April-JuneYellowbellsFritillaria pudicawildflower · March-MayYellowstone DrabaDraba incertawildflower · April-June