United States

Aconite

Aconitum napellus

Critically Endangered

Admiralty Island Meadow Vole (Admiraltiae)

Microtus pennsylvanicus

Agrimony

Agrimonia eupatoria

Near Threatened

Ajuga

Ajuga reptans

Endangered

Alder

Alnus glutinosa

Alder leaf beetle

Agelastica alni

Alder Spittlebug

Aphrophora alni

All Species in United States

New Zealand flax

Phormium tenax

New Zealand nightshade

Solanum aviculare

New Zealand spinach

Tetragonia tetragonioides

New Zealand tea tree

Leptospermum scoparium

Ngaio tree

Myoporum laetum

Niger

Guizotia abyssinica

Night-Blooming Cereus

Selenicereus grandiflorus

Nightflowering silene

Silene noctiflora

Endangered

Night-Flying Dung Beetle

Acrossus rufipes

Night jessamine

Cestrum nocturnum

Night scented orchid

Epidendrum nocturnum

Night-scented Stock

Matthiola longipetala

Nightshade

Solanum laxum

Nightshade

Solanum chrysotrichum

Nightshade

Solanum umbellatum

Nightshade

Solanum linnaeanum

nigra scale

Parasaissetia nigra

Nikko fir

Abies homolepis

nilgai

Boselaphus tragocamelus

Nimblewill

Muhlenbergia schreberi

Nipple fruit

Solanum mammosum

Nipple Lichen

Pycnothelia papillaria

Endangered

Nipplewort Rust

Puccinia lapsanae

Niruri

Phyllanthus debilis

Nit grass

Gastridium phleoides

Nitrous Bonnet

Mycena leptocephala

Noble yarrow

Achillea nobilis

Nodding beggartick

Bidens cernua

Nodding Bulrush

Scirpus pendulus

Nodding Catchfly

Silene pendula

Nodding Clover

Trifolium cernuum

Nodding Fescue

Festuca subverticillata

Nodding hypecoum

Hypecoum pendulum

Nodding sage

Salvia nutans

Nodding Trillium

Trillium cernuum

Nodeweed

Synedrella nodiflora

Nonesuch daffodil

Narcissus incomparabilis

Nootka alkaligrass

Puccinellia nutkaensis

Nordmann'S Orbweaver

Araneus nordmanni

Norfolk island pine

Araucaria heterophylla

North Africa grass

Ventenata dubia

North American Hoary Bat

Aeorestes cinereus

North American porcupine

Erethizon dorsatus

Northeastern Pine Sawyer Beetle

Monochamus notatus

Northern Adder'S-Tongue

Ophioglossum pusillum

Northern Aerial Yellowjacket

Dolichovespula norvegicoides

Northern amber bumble bee

Bombus borealis

Northern Arrow-Wood

Viburnum recognitum

Northern Birch

Betula sandbergii

Northern Blue Clematis

Clematis occidentalis

Extinct

Northern Bluet

Enallagma annexum

Northern Bog Starwort

Stellaria calycantha

Northern Bog St. John'S-Wort

Hypericum boreale

Northern Brook Lamprey

Ichthyomyzon fossor

Northern Camouflage Lichen

Melanohalea septentrionalis

Extinct

Northern Carpet

Xanthorhoe abrasaria

Northern Catalpa

Catalpa speciosa

Northern cattle grub

Hypoderma bovis

Extinct

Northern Cinnabar Polypore

Trametes cinnabarina

Northern Dropseed

Sporobolus heterolepis