Canada's Plant Hardiness Site
Pages 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 ZOsmanthus americanus devilwood
Osmanthus fragrans sweet olive
Osmanthus heterophyllus holly tea olive
Ostrya virginiana eastern hop-hornbeam
Oxydendrum arboreum sourwood
Oenothera lindheimeri butterfly gaura
Oenanthe javanica flamingo creeper
Oenothera macrocarpa Ozark sundrops
Oenothera speciosa showy evening primrose
Onoclea sensibilis sensitive fern
Onopordum acanthium Scottish thistle
Ophiopogon japonicus dwarf mondo grass
Opuntia fragilis brittle prickly-pear cactus
Opuntia humifusa eastern pricklypear cactus
Opuntia polyacantha plains prickly-pear cactus
Origanum vulgare wild marjarom
Ornithogalum nutans drooping star-of-bethlehem
Ornithogalum umbellatum common start-of-Bethlehem
Osmundastrum cinnamomeum cinnamon fern
Osmunda claytoniana interrupted fern
Osmunda regalis royal fern
Oxalis oregana redwood-sorrel
Oemleria cerasiformis oso berry;
Oenothera biennis wild evening primrose
Oplopanax horridus devil's club
Opuntia macrorhiza Missouri prickly pear cactus
Opuntia phaeacantha brownspine pricklypear
Oxytropis lambertii Lambert's oxytrope
Oxytropis sericea white oxytrope
Ophioglossum pusillum northern adder's-tongue
Oxybasis glauca oakleaf goosefoot
Osmorhiza berteroi tapering sweetcicely
Osmorhiza claytonii woolly sweetcicely
Osmorhiza depauperata bluntfruit sweetcicely
Oclemena x blakei Blake's aster
Onobrychis viciifolia sainfoin
Orobanche fasciculata clustered broomrape
Oxalis acetosella common woodsorrel
Oxybasis rubra red goosefoot
Osmorhiza longistylis aniseroot
Omalotheca sylvatica heath cudweed
Oclemena acuminata whorled wood aster
Oclemena nemoralis nodding bog aster
Orthilia secunda one-sided wintergreen
Oxytropis borealis northern oxytrope
Oxytropis campestris yellow oxytrope
Oxytropis deflexa pendant-pod oxytrope
Oxytropis splendens showy oxytrope
Oenothera gaura biennial beeblossom
Oenothera fruticosa yellow sundrops
Oenothera nuttallii white evening primrose
Oenothera parviflora smallflowered primrose
Oenothera perennis small sundrops
Oenothera villosa hairy evening primrose
Orobanche uniflora naked broomrape
Orthocarpus luteus yellow owl-clover
Oxalis stricta European woodsorrel
Oryzopsis asperifolia rough-leaf mountain rice
Olneya tesota Arizona ironwood
Oxalis corniculata creeping wood-sorrel
Oenanthe sarmentosa American water parsley
Osmorhiza occidentalis western sweetroot
Osmorhiza purpurea purple sweet cicely
Oxypolis occidentalis western oxypolis
Oxypolis rigidior stiff cowbane
Olsynium douglasii Douglas's widowgrass
Oreocarya glomerata cockscomb cryptantha
Oxyria digyna mountain sorrel
Oxytropis arctica arctic oxytrope
Oxytropis huddelsonii Huddelson's oxytrope
Oxytropis lagopus hare-footed oxytrope
Oxytropis maydelliana subsp. maydelliana
Oxytropis mertensiana Mertens' oxytrope
Oxytropis nigrescens blackish oxytrope
Oxytropis scammaniana Scamman's oxytrope
Oxalis dillenii slender yellow wood-sorrel
Orobanche corymbosa
Orobanche ludoviciana
Orthocarpus bracteosus rosy owl-clover
Orthocarpus erianthus
Orthocarpus imbricatus mountain owl-clover
Orthocarpus tenuifolius thin-leaf owl-clover
Opuntia x columbiana grizzly bear prickly-pear cactus
Orontium aquaticum golden club
Oreocarya cana Gray mountain-plant
Oenothera argillicola
Ophioglossum engelmannii limestone adder's-tongue
Oenothera cespitosa
Oenothera clelandii
Oenothera flava
Oenothera laciniata
Oenothera oakesiana
Oenothera pilosella
Oenothera filiformis
Oenothera glazioviana
Oenothera pallida
Oenothera suffrutescens
Opuntia basilaris beavertail prickleypear
Oxytropis podocarpa Gray's oxytrope
Oenothera serrulata serrate-leaved evening primrose
Opuntia cespitosa eastern prickly-pear cactus
Oreojuncus trifidus highland rush
Osmunda spectabilis royal fern
Odontites vulgaris red bartsia
Oxalis montana white woodsorrel
Oreopteris quelpartensis mountain fern
Ostrya knowltonii Knowlton's hop-hornbeam
Ocimum basilicum common basil
Oenothera macrocarpa subsp. fremontii dwarf sundrops
Oenothera villosa subsp. villosa hairy evening primrose
Oxalis acetosella subsp. montana mountain woodsorrel
Onosmodium molle subsp. hispidissimum softhair marbleseed
Oenothera macrocarpa subsp. macrocarpa
Oenothera pallida subsp. pallida
Oenothera villosa subsp. strigosa
Opuntia basilaris var. longiareolata Grand Canyon beavertail pricklypear
Opuntia polyacantha var. nicholii Nichol's prickly pear cactus
Oxytropis borealis var. viscida Nuttall's oxytrope
Oxytropis campestris var. johannensis Saint John River oxytrope
Oxytropis deflexa var. foliolosa foliose oxytrope
Oxytropis deflexa var. sericea silky oxytrope
Osmunda regalis var. spectabilis royal fern
Oxybasis rubra var. rubra coast blite