Canada's Plant Hardiness Site
Data have been entered for 7138 species.
(Last updated Wed Jan 14 11:46:39 EST 2015)
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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
Oarisma garita garita skipperling
Ocimum basilicum common basil
Oclemena acuminata whorled wood aster
Oclemena nemoralis nodding bog aster
Oclemena Xblakei Blake's aster
Odontites verna subsp. serotina red odontites
Oemleria cerasiformis osoberry
Oeneis uhleri varuna Varuna arctic
Oenothera argillicola
Oenothera biennis wild evening primrose
Oenothera clelandii
Oenothera filiformis
Oenothera flava
Oenothera fruticosa yellow sundrops
Oenothera fruticosa subsp. glauca
Oenothera gaura biennial beeblossom
Oenothera grandiflora
Oenothera laciniata
Oenothera lindheimeri butterfly gaura
Oenothera macrocarpa Ozark sundrops
Oenothera macrocarpa subsp. fremontii dwarf sundrops
Oenothera nuttallii white evening primrose
Oenothera oakesiana
Oenothera parviflora smallflowered primrose
Oenothera perennis small sundrops
Oenothera pilosella
Oenothera pilosella subsp. pilosella
Oenothera serrulata serrate-leaved evening primrose
Oenothera speciosa showy evening primrose
Oenothera suffrutescens
Oenothera villosa hairy evening primrose
Oenothera villosa subsp. villosa hairy evening primrose
Olneya tesota Arizona ironwood
Olsynium douglasii var. douglasii Douglas's widowgrass
Olsynium douglasii var. inflatum Douglas's grass widow
Omalotheca norvegica Norwegian cudweed
Omalotheca supina dwarf cudweed
Omalotheca sylvatica woodland arctic-cudweed
Onoclea sensibilis sensitive fern
Ononis spinosa
Onopordum acanthium Scottish thistle
Onosmodium molle smooth onosmodium
Onosmodium molle subsp. hispidissimum softhair marbleseed
Onosmodium molle subsp. occidentale western false gromwell
Onosmodium virginianum
Ophioglossum engelmannii
Ophioglossum pusillum northern adder's-tongue
Ophiopogon planiscapus black mondo grass
Oplopanax horridus devil's club
Opuntia basilaris var. brachyclada little beavertail prickleypear
Opuntia basilaris var. longiareolata Grand Canyon beavertail pricklypear
Opuntia fragilis brittle pricklypear cactus
Opuntia humifusa eastern pricklypear cactus
Opuntia humifusa var. humifusa eastern prickly-pear cactus
Opuntia macrorhiza Missouri prickly pear cactus
Opuntia phaeacantha brownspine pricklypear
Opuntia polyacantha plains pricklypear cactus
Opuntia polyacantha var. nicholii Nichol's prickly pear cactus
Orcuttia tenuis
Origanum laevigatum ornamental oregano
Origanum vulgare pot oregano
Ornithogalum nutans drooping star-of-bethlehem
Ornithogalum umbellatum common start-of-Bethlehem
Orobanche corymbosa
Orobanche fasciculata clustered broomrape
Orobanche ludoviciana
Orobanche ludoviciana subsp. ludoviciana
Orobanche pinorum
Orobanche uniflora naked broomrape
Orontium aquaticum golden club
Orthilia secunda onesided wintergreen
Orthocarpus bracteosus
Orthocarpus luteus golden-tongue owl clover
Orthocarpus tenuifolius
Oryctes nevadensis
Oryzopsis asperifolia mountain rice grass
Osmorhiza berteroi tapering sweetcicely
Osmorhiza claytonii woolly sweetcicely
Osmorhiza depauperata bluntfruit sweetcicely
Osmorhiza longistylis aniseroot
Osmorhiza occidentalis western sweetroot
Osmorhiza purpurea purple sweet cicely
Osmunda claytoniana interrupted fern
Osmunda regalis royal fern
Osmunda regalis var. spectabilis royal fern
Osmundastrum cinnamomeum cinnamon fern
Ostrya knowltonii western hop-hornbeam
Ostrya virginiana ironwood
Ostrya virginiana var. virginiana
Oxalis acetosella common woodsorrel
Oxalis acetosella subsp. montana mountain woodsorrel
Oxalis adenophylla Chilean woodsorrel
Oxalis corniculata creeping woodsorrel
Oxalis dillenii
Oxalis oregana redwood sorrel
Oxalis stricta European woodsorrel
Oxydendrum arboreum sourwood
Oxypolis canbyi Canby's cowbane
Oxypolis occidentalis western oxypolis
Oxypolis rigidior stiff cowbane
Oxyria digyna alpine mountain sorrel
Oxytropis borealis boreal locoweed
Oxytropis borealis var. hudsonica Hudson Bay locoweed
Oxytropis borealis var. viscida sticky locoweed
Oxytropis campestris field locoweed
Oxytropis campestris var. columbiana Columbia crazyweed
Oxytropis campestris var. davisii Davis's locoweed
Oxytropis campestris var. johannensis Saint John River locoweed
Oxytropis campestris var. minor Newfoundland locoweed
Oxytropis deflexa pendantpod oxytrope
Oxytropis deflexa var. foliolosa pendantpod oxytrope
Oxytropis deflexa var. sericea early yellow locoweed
Oxytropis huddelsonii
Oxytropis lagopus
Oxytropis lagopus var. conjugans
Oxytropis lambertii purple locoweed
Oxytropis mertensiana
Oxytropis nana
Oxytropis sericea white point locoweed
Oxytropis splendens showy locoweed