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
Oclemena acuminata whorled wood aster
Oclemena nemoralis nodding bog aster
Oclemena Xblakei Blake's aster
Oenothera argillicola
Oenothera biennis wild evening primrose
Oenothera gaura biennial beeblossom
Oenothera parviflora smallflowered primrose
Oenothera perennis small sundrops
Oenothera speciosa showy evening primrose
Olneya tesota Arizona ironwood
Omalotheca sylvatica woodland arctic-cudweed
Onoclea sensibilis sensitive fern
Onosmodium molle smooth onosmodium
Onosmodium molle subsp. hispidissimum softhair marbleseed
Onosmodium virginianum
Ophioglossum engelmannii
Ophioglossum pusillum northern adder's-tongue
Oplopanax horridus devil's club
Opuntia fragilis brittle pricklypear cactus
Opuntia humifusa eastern pricklypear cactus
Opuntia macrorhiza Missouri prickly pear cactus
Opuntia polyacantha plains pricklypear cactus
Orcuttia tenuis
Ornithogalum umbellatum common start-of-Bethlehem
Orobanche fasciculata clustered broomrape
Orobanche ludoviciana
Orobanche uniflora naked broomrape
Orontium aquaticum golden club
Orthilia secunda onesided wintergreen
Orthocarpus luteus golden-tongue owl clover
Oryctes nevadensis
Oryzopsis asperifolia mountain rice grass
Osmorhiza berteroi tapering sweetcicely
Osmorhiza claytonii woolly sweetcicely
Osmorhiza depauperata bluntfruit sweetcicely
Osmorhiza longistylis aniseroot
Osmunda claytoniana interrupted fern
Osmunda regalis royal fern
Osmunda regalis var. spectabilis royal fern
Osmundastrum cinnamomeum cinnamon fern
Ostrya virginiana ironwood
Oxalis acetosella common woodsorrel
Oxalis stricta European woodsorrel
Oxydendrum arboreum sourwood
Oxypolis canbyi Canby's cowbane
Oxypolis rigidior stiff cowbane
Oxytropis campestris field oxytrope
Oxytropis campestris var. johannensis field oxytrope
Oxytropis deflexa pendantpod oxytrope
Oxytropis sericea white point locoweed
Oxytropis splendens showy locoweed