Canada's Plant Hardiness Site

Preliminary climatic range maps for 2800 species.

(Last updated Thu Jan 24 16:21:44 EST 2013)
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Pachysandra procumbens Alleghany pachysandra
Packera aurea golden groundsel
Packera indecora rayless mountain groundsel
Packera millefolium piedmont ragwort
Packera pauciflora alpine groundsel
Packera paupercula balsam groundsel
Panax quinquefolius Canadian ginseng
Panax trifolius groundnut
Panicum capillare common witchgrass
Panicum flexile wiry witchgrass
Panicum philadelphicum Philadelphia witchgrass
Panicum philadelphicum subsp. philadelphicum Philadelphia witchgrass
Panicum virgatum switch grass
Parietaria pensylvanica Pennsylvania pellitory
Parnassia glauca fen grass-of-Parnassus
Parnassia grandifolia largeleaf grass-of-Parnassus
Parnassia kotzebuei Kotzebue's grass-of-Parnassus
Parnassia palustris mountain grass-of-Parnassus
Parnassia parviflora smallflower grass-of-Parnassus
Paronychia argyrocoma
Parthenium alpinum
Parthenium integrifolium wild quinine
Parthenocissus inserta woodbine
Parthenocissus quinquefolia Virginia creeper
Parthenocissus vitacea false Virginia creeper
Pascopyrum smithii bluestem wheatgrass
Passiflora incarnata purple passionflower
Pastinaca sativa wild parsnip
Paxistima canbyi Canby's mountain-lover
Paxistima myrsinites Oregon box
Pedicularis canadensis wood betony
Pedicularis flammea redtipped lousewort
Pedicularis groenlandica elephantshead
Pedicularis labradorica Labrador woodbetony
Pedicularis lanceolata swamp woodbetony
Pediocactus simpsonii Simpson's hedgehog cactus
Pediomelum esculentum prairie turnip
Pellaea atropurpurea purplestem cliffbrake
Pellaea glabella smooth cliffbrake
Peltandra sagittifolia white arrow arum
Peltandra virginica green arrow arum
Penstemon cobaea
Penstemon cobaea subsp. purpureus
Penstemon digitalis foxglove beardtongue
Penstemon gracilis slender beardtongue
Penstemon harringtonii
Penstemon haydenii
Penstemon hirsutus hairy beardtongue
Penstemon lemhiensis
Penstemon oklahomensis
Penstemon pallidus pale beardtongue
Penthorum sedoides Virginia stonecrop
Perideridia americana eastern yampah
Perilla frutescens beefsteak plant
Perityle intricata desert rock daisy
Persea borbonia redbay
Persicaria amphibia amphibious knotweed;
Persicaria arifolia arumleaf tearthumb
Persicaria careyi Carey's smartweed
Persicaria hydropiperoides swamp smartweed
Persicaria lapathifolia pale smartweed
Persicaria maculosa spotted lady's-thumb
Persicaria punctata dotted smartweed
Persicaria sagittata arrow-vine
Persicaria virginiana jumpseed
Petasites frigidus arctic sweet coltsfoot
Petasites frigidus var. palmatus northern sweet coltsfoot
Petasites frigidus var. sagittatus arrowhead sweet coltsfoot
Phacelia franklinii Franklin's phacelia
Phacelia minutissima
Phacelia verna
Phalaris arundinacea reed canarygrass
Phaseolus polystachios
Phegopteris connectilis long beech fern
Phegopteris hexagonoptera broad beech fern
Philadelphus lewisii Lewis' mockorange
Phleum alpinum alpine timothy
Phleum pratense common timothy
Phlox bifida
Phlox divaricata wild blue phlox
Phlox glaberrima smooth phlox
Phlox paniculata summer phlox
Phlox pilosa prairie phlox
Phoradendron leucarpum
Phragmites australis common reed
Phryma leptostachya American lopseed
Phyllodoce empetriformis pink mountainheath
Physalis heterophylla wild ground cherry
Physalis longifolia var. subglabrata smooth groundcherry
Physocarpus capitatus Pacific ninebark
Physocarpus opulifolius ninebark
Physostegia virginiana obedient plant
Phytolacca americana Virginia poke
Picea abies European spruce
Picea engelmannii Engelmann spruce
Picea engelmannii var. engelmannii Engelmann spruce
Picea glauca white spruce
Picea mariana double spruce
Picea pungens blue spruce
Picea rubens red spruce
Picea sitchensis Sitka spruce
Pilea pumila dwarf clearweed
Pilosella aurantiaca devil's paintbrush
Pilosella officinarum mouseear hawkweed
Pilosella piloselloides king devil hawkweed
Pilosella Xfloribunda pale hawkweed
Pinguicula primuliflora
Pinguicula vulgaris common butterwort
Pinus albicaulis whitebark pine
Pinus aristata Rocky Mountain bristlecone pine
Pinus attenuata knobcone pine
Pinus banksiana jack pine
Pinus cembroides Mexican piñon
Pinus clausa sand pine
Pinus contorta lodgepole pine
Pinus contorta var. contorta shore pine
Pinus contorta var. latifolia lodgepole pine
Pinus echinata southern pine
Pinus edulis American piñon
Pinus elliottii slash pine
Pinus flexilis Rocky Mountain white pine
Pinus glabra spruce pine
Pinus jeffreyi Truckee pine
Pinus lambertiana big sugar pine
Pinus leiophylla var. chihuahuana Chihuahua pine
Pinus monophylla oneleaf pinyon
Pinus monticola western white pine
Pinus nigra Austrian pine
Pinus palustris longleaf pine
Pinus ponderosa Sierra brownbark pine
Pinus pungens Table Mountain pine
Pinus resinosa red pine
Pinus rigida northern pitch pine
Pinus sabiniana foothills pine
Pinus serotina pond pine
Pinus strobiformus Mexican white pine
Pinus strobus Weymouth pine
Pinus sylvestris Caledonian pine
Pinus taeda Arkansas pine
Pinus virginiana cedar pine
Piptatherum canadense Richardson's feathergrass
Piptatherum pungens sharp piptatherum
Piptatherum racemosum mountain ricegrass
Piptochaetium avenaceum blackseed speargrass
Planera aquatica water elm
Plantago cordata kingroot
Plantago lanceolata ripplegrass
Plantago major whiteman's foot
Plantago rugelii blackseed plantain
Platanthera aquilonis leafy northern green orchid
Platanthera blephariglottis whitefringed orchid
Platanthera ciliaris yellowfringed orchid
Platanthera clavellata clubspur orchid
Platanthera cristata
Platanthera dilatata tall white bog orchid
Platanthera dilatata var. dilatata tall white bog orchid
Platanthera flava tubercled orchid
Platanthera flava var. herbiola small palegreen orchis
Platanthera grandiflora large butterfly orchid
Platanthera hookeri Hooker's orchid
Platanthera integra
Platanthera integrilabia
Platanthera lacera green fringed orchid
Platanthera leucophaea prairie white fringed orchid
Platanthera macrophylla Goldie's roundleaf orchid
Platanthera obtusata oneleaf rein orchid
Platanthera orbiculata large roundleaf orchid
Platanthera peramoena
Platanthera praeclara Great Plains white fringed orchid
Platanthera psycodes small butterfly orchid
Platanus occidentalis American sycamore
Pleurozium schreberi Schreber's moss
Poa alpina alpine bluegrass
Poa alsodes grove bluegrass
Poa annua low speargrass
Poa compressa wiregrass
Poa glauca glaucous bluegrass
Poa interior interior bluegrass
Poa laxiflora laxflower bluegrass
Poa marcida weeping bluegrass
Poa nemoralis woodland bluegrass
Poa paludigena
Poa palustris fowl bluegrass
Poa pratensis Kentucky bluegrass
Poa saltuensis drooping bluegrass
Poa saltuensis subsp. languida oldpasture bluegrass
Poa secunda Sandberg's bluegrass
Poa sylvestris woodland bluegrass
Poa trivialis rough meadowgrass
Podophyllum peltatum Mayapple
Podostemum ceratophyllum threadfoot
Pogogyne floribunda
Pogonia ophioglossoides rose pogonia
Polanisia dodecandra roughseed clammyweed
Polemonium reptans creeping Jacob's ladder
Polemonium vanbruntiae Van Brunt's Jacob's-ladder
Polygala cruciata crossleaf milkwort
Polygala hookeri
Polygala incarnata procession flower
Polygala paucifolia fringed polygala
Polygala polygama racemed milkwort
Polygala sanguinea field milkwort
Polygala senega Seneca snakeroot
Polygala verticillata whorled milkwort
Polygonatum biflorum giant Solomon's seal
Polygonatum biflorum subsp. commutatum giant Solomon's seal
Polygonatum pubescens hairy Solomon's seal
Polygonum achoreum striate knotweed
Polygonum articulatum coastal jointweed
Polygonum aviculare prostrate knotweed
Polygonum aviculare subsp. buxiforme shore knotweed
Polygonum aviculare subsp. depressum ovalleaf knotweed
Polygonum douglasii Douglas's knotweed
Polygonum erectum erect knotweed
Polygonum glaucum
Polygonum ramosissimum yellowflower knotweed
Polypodium virginianum rock polypody
Polystichum acrostichoides Christmas fern
Polystichum braunii Braun's hollyfern
Polystichum lonchitis northern hollyfern
Polystichum munitum western swordfern
Polytaenia nuttallii Nuttall's prairie parsley
Pontederia cordata pickerelweed
Ponthieva racemosa
Populus alba silver poplar
Populus angustifolia narrowleaf balsam poplar
Populus balsamifera balsam poplar
Populus balsamifera subsp. trichocarpa black cottonwood
Populus deltoides eastern cottonwood
Populus deltoides subsp. monilifera plains cottonwood
Populus grandidentata bigtooth aspen
Populus heterophylla swamp cottonwood
Populus tremuloides trembling aspen
Portulaca oleracea common purslane
Potamogeton alpinus Northern pondweed
Potamogeton amplifolius bigleaf pondweed
Potamogeton bicupulatus two-cupped pondweed
Potamogeton confervoides Tuckerman's pondweed
Potamogeton crispus curlyleaf pondweed
Potamogeton diversifolius waterthread pondweed
Potamogeton epihydrus ribbonleaf pondweed
Potamogeton foliosus leafy pondweed
Potamogeton friesii Fries' pondweed
Potamogeton gramineus grassy pondweed
Potamogeton hillii Hill's pondweed
Potamogeton illinoensis Illinois pondweed
Potamogeton natans broadleaf pondweed
Potamogeton nodosus longleaf pondweed
Potamogeton oakesianus Oakes' pondweed
Potamogeton obtusifolius bluntleaf pondweed
Potamogeton perfoliatus redhead grass
Potamogeton praelongus longstalk pondweed
Potamogeton pulcher heartleaf pondweed
Potamogeton pusillus small pondweed
Potamogeton richardsonii Richardson's pondweed
Potamogeton robbinsii fern pondweed
Potamogeton spirillus northern snailseed pondweed
Potamogeton strictifolius narrowleaf pondweed
Potamogeton vaseyi Vasey's pondweed
Potamogeton zosteriformis flatstem pondweed
Potentilla argentea hairy cinquefoil
Potentilla gracilis slender cinquefoil
Potentilla hippiana woolly cinquefoil
Potentilla inclinata ashy cinquefoil
Potentilla nivea snowy cinquefoil
Potentilla norvegica rough cinquefoil
Potentilla pensylvanica coastal cinquefoil
Potentilla recta upright cinquefoil
Potentilla simplex oldfield cinquefoil
Potentilla supina subsp. paradoxa paradox cinquefoil
Primula egaliksensis bog primrose
Primula incana silvery primrose
Primula jeffreyi Sierra shooting star
Primula laurentiana birdseye primrose
Primula meadia shootingstar
Primula mistassinica Mistassini primrose
Primula pauciflora prairie shooting star
Prosartes hookeri Hooker's mandarin
Prosartes lanuginosa yellow fairybells
Prosartes trachycarpa roughfruit fairybells
Proserpinaca palustris marsh mermaid weed
Prosopis glandulosa var. torreyana western honey mesquite
Prosopis velutina velvet mesquite
Prunella vulgaris healall
Prunus alleghaniensis var. davisii
Prunus americana American plum
Prunus avium sweet cherry
Prunus emarginata bitter cherry
Prunus maritima beach plum
Prunus nigra Canada plum
Prunus pensylvanica pincherry
Prunus persica common peach
Prunus pumila Great Lakes sand cherry
Prunus pumila var. depressa dwarf sand cherry
Prunus serotina wild black cherry
Prunus susquehanae Susquehana sand cherry
Prunus virginiana bitter cherry
Prunus virginiana var. demissa western choke cherry
Pseudognaphalium macounii clammy everlasting
Pseudoroegneria spicata beardless wheatgrass
Pseudotsuga menziesii Douglas fir
Pseudotsuga menziesii var. glauca Rocky Mountain Douglas fir
Ptelea trifoliata common hoptree
Pteridium aquilinum eastern bracken fern
Pteridium aquilinum var. latiusculum eastern bracken fern
Pteroglossaspis ecristata
Pterospora andromedea woodland pinedrops
Ptilimnium nodosum harperella
Ptilium crista-castrensis plume moss
Puccinellia distans relaxed saltmarsh grass
Puccinellia nutkaensis weeping alkali-grass
Puccinellia nuttalliana Nuttall's goose grass
Pueraria montana var. lobata kudzu
Purshia tridentata antelope bitterbrush
Pycnanthemum muticum mountain mint
Pycnanthemum tenuifolium slenderleaf mountain mint
Pycnanthemum verticillatum var. pilosum hairy mountain mint
Pycnanthemum virginianum Virginia mountain mint
Pyrola americana roundleaf pyrola
Pyrola asarifolia pink pyrola
Pyrola chlorantha greenflowered pyrola
Pyrola elliptica shinleaf
Pyrola grandiflora arctic pyrola
Pyrola minor lesser pyrola
Pyrrocoma insecticruris
Pyrrocoma liatriformis
Pyrrocoma radiata
Pyrus communis common pear
Pyxidanthera brevifolia Sandhills pyxie-moss