United States

Agrimony

Agrimonia eupatoria

Ajuga

Ajuga reptans

Endangered

Alder

Alnus glutinosa

Alder leaf beetle

Agelastica alni

Alder Spittlebug

Aphrophora alni

All Species in United States

Alecost

Tanacetum balsamita

Aleppo Avens

Geum aleppicum

Aleppo Grass

Sorghum halepense

Aleppo pine

Pinus halepensis

Aleutian Maidenhair

Adiantum aleuticum

Alewife Floater

Utterbackiana implicata

Alexander palm

Ptychosperma elegans

Alexanders

Angelica atropurpurea

Alexandra palm

Archontophoenix alexandrae

Alexandrian laurel

Calophyllum inophyllum

Alfalfa

Medicago sativa

Alfalfa blotch leafminer

Agromyza frontella

Alfalfa Butterfly

Colias eurytheme

Alfalfa dodder

Cuscuta approximata

alfalfa leaf-cutter bee

Megachile rotundata

Alfalfa Weevil

Hypera postica

Alfilaria

Erodium cicutarium

Algae

Cutleria cylindrica

Algae

Gracilaria vermiculophylla

Alga-Like Matted-Moss

Serpoleskea confervoides

Algal Pin Lichen

Chaenothecopsis pusiola

Alga Pondweed

Potamogeton confervoides

Alien field ant

Lasius alienus

Data Deficient

Alisma Graminoide

Alisma gramineum

Critically Endangered

Alkali American Aster

Symphyotrichum ciliatum

Alkali-Blite

Oxybasis rubra

Alkali-Grass

Anticlea elegans

Alkali Saltgrass

Distichlis spicata

Alkali sandspurry

Spergularia diandra

Alkali swainsonpea

Sphaerophysa salsula

Alkanet

Anchusa officinalis

Allegheny Blackberry

Rubus allegheniensis

Allegheny Hawkweed

Hieracium paniculatum

Allegheny Monkey-Flower

Mimulus ringens

Allegheny Mountain Dusky Salamander

Desmognathus ochrophaeus

Allegheny Serviceberry

Amelanchier laevis

Allegheny Serviceberry

Amelanchier arborea

Allegheny Vine

Adlumia fungosa

Allheal

Valeriana officinalis

Alligatorweed

Alternanthera philoxeroides

Allium leafminer

Phytomyza gymnostoma

allseed

Radiola linoides

Endangered

Allspice

Pimenta dioica

Allspice

Lindera benzoin

Almond moth

Cadra cautella

Almond-Scented Russula

Russula fragrantissima

Endangered

Almond Woodwax

Hygrophorus agathosmus

Alpine Bilberry

Vaccinium uliginosum

Extinct

Alpine Bistort

Bistorta vivipara

Alpine Bitterroot

Lewisia pygmaea

Alpine Bloodspot Lichen

Ophioparma ventosa

Extinct

Alpine Blueberry

Vaccinium boreale

Alpine Bog Laurel

Kalmia microphylla

Alpine Bulrush

Trichophorum alpinum

Alpine Camouflage Lichen

Melanelia stygia

Alpine Cat'S-Tail

Phleum alpinum

Alpine Chickweed

Cerastium alpinum

Alpine Cliff Fern

Woodsia alpina

Alpine Cranberry

Vaccinium vitis-idaea

Alpine currant

Ribes alpinum