Australia

Alexandrium tamarense

Arthrocladia villosa

Botrytella micromora

Alexandrium minutum

Striaria attenuata

Stictyosiphon soriferus

Gymnodinium catenatum

Coolia monotis

Aaron'S Rod

Verbascum thapsus

Abalone

Haliotis semiplicata

Abele

Populus alba

Absinth Sagewort

Artemisia absinthium

Abutilon-Hemp

Abutilon theophrasti

Abyssinian mustard

Crambe hispanica

Acrid lettuce

Lactuca virosa

Adam's Leedle

Yucca gloriosa

Adam'S Needle

Yucca filamentosa

Adder's-tongue Spearwort

Ranunculus ophioglossifolius

Adriatic soapwort

Saponaria calabrica

Aegean wallflower

Erysimum cheiri

Afghan-Melon

Citrullus lanatus

African amaranth

Amaranthus muricatus

African asparagus fern

Asparagus asparagoides

African bermudagrass

Cynodon nlemfuensis

African Bermuda-grass

Cynodon incompletus

African boxthorn

Lycium ferocissimum

African bristlegrass

Setaria sphacelata

African cornflag

Chasmanthe floribunda

African daisy

Arctotis stoechadifolia

African daisy

Arctotis venusta

African dogstooth grass

Cynodon transvaalensis

African-lily

Agapanthus praecox

African locust-bean

Parkia biglobosa

African Marigold

Tagetes erecta

African pepperwort

Lepidium africanum

African plume

Bauhinia galpinii

African scurfpea

Psoralea pinnata

African senna

Senna didymobotrya

African-Spinach

Amaranthus cruentus

African tuliptree

Spathodea campanulata

Ageratum

Ageratum houstonianum

Agrimony

Agrimonia eupatoria

Ailanthus

Ailanthus altissima

Ajuga

Ajuga reptans

akee

Blighia sapida

Alder

Alnus glutinosa

Aleppo Grass

Sorghum halepense

Aleppo pine

Pinus halepensis

Alfalfa

Medicago sativa

Alfalfa dodder

Cuscuta approximata

Alfilaria

Erodium cicutarium

Algerian Iris

Iris unguicularis

Algerian Oak

Quercus canariensis

Alkali Saltgrass

Distichlis spicata

Alkali sandspurry

Spergularia diandra

Alkanet

Anchusa officinalis

Alligatorweed

Alternanthera philoxeroides

Aloe Yucca

Yucca aloifolia

Alpine Knapweed

Centaurea nigrescens

Alsike Clover

Trifolium hybridum