Canada

Aconite

Aconitum napellus

Critically Endangered

Agrimony

Agrimonia eupatoria

Ajuga

Ajuga reptans

Endangered

Alder

Alnus glutinosa

Alexanders

Angelica atropurpurea

Allegheny Serviceberry

Amelanchier arborea

Common Silver Hairgrass

Aira caryophyllea

Endangered

All Species in Canada

Nuttall'S Alkali Grass

Puccinellia nuttalliana

Nuttall's pussytoes

Antennaria parvifolia

Creeping Bryozoan

Amathia gracilis

Nuttall's quillwort

Isoetes nuttallii

Bog-Rhubarb

Petasites hybridus

Nuttall's waterweed

Elodea nuttallii

American Great Bulrush

Schoenoplectus tabernaemontani

alpine cinquefoil

Potentilla crantzii

Aleppo Grass

Sorghum halepense

Oakes' Pondweed

Potamogeton oakesianus

globular spider beetle

Trigonogenius globulus

Gibbous minute beetle

Clambus gibbulus

Oblongleaf orache

Atriplex oblongifolia

Dwarf-Mistletoe

Arceuthobium pusillum

Spiny Pill Beetle

Chaetophora spinosa

Ogden'S Pondweed

Potamogeton ogdenii

Southern pine sawyer

Monochamus titillator

Ocillate rove beetle

Omalium rivulare

Ojibway waterwort

Elatine ojibwayensis

O'Kennon's hawthorn

Crataegus okennonii

old house borer

Hylotrupes bajulus

Old-man-in-the-spring

Senecio vulgaris

dwarf mountain fleabane

Erigeron compositus

One-Flowered Broomrape

Aphyllon uniflorum

one-flowered cinquefoil

Potentilla uniflora

One-Flower Pyrola

Moneses uniflora

Staph beetle

Gabrius appendiculatus

inland serviceberry

Amelanchier interior

American Cancer-Root

Conopholis americana

Bronze Willowherb

Epilobium coloratum

Iowa golden carpet

Chrysosplenium iowense

burreed-like pondweed

Potamogeton sparganiifolius

Wasp

Chrysocharis nitetis

Staph beetle

Xantholinus longiventris

Staph beetle

Tachinus subterraneus

orbicular whitetop

Lepidium chalepense

Oregano

Origanum vulgare

Oregon Ash

Fraxinus latifolia

Oregon Crab Apple

Malus fusca

Oregon grape

Mahonia aquifolium

Oriental false wheatgrass

Eremopyrum orientale

Oriental poppy

Papaver orientale

Oriental prawn

Palaemon macrodactylus

Staph beetle

Philonthus sanguinolentus

Staph beetle

Cephennium gallicum

American Mountain Ash

Sorbus americana

Oriental virginsbower

Clematis orientalis

Ornamental Orbweaver

Larinioides patagiatus

Orpin D'Espagne

Sedum hispanicum

Staph beetle

Atheta polaris

Orpin Sarmenteux

Sedum sarmentosum

Osage-orange

Maclura pomifera

Osier

Salix viminalis

Osoberry

Oemleria cerasiformis

pine grass

Calamagrostis rubescens

Downy Poplar

Populus heterophylla

Falkland Island sedge

Carex macloviana

Ottawa Barberry

Berberis ottawensis

Ottertail Pass saxifrage

Micranthes tenuis

African Marigold

Tagetes erecta