Illinois Exotic Species List
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Exotic Species in Illinois Descriptions for these exotic species in Illinois will be added to the Web page as time allows for their development. A name followed by an asterisk (*) indicates that a description for that species can currently be found on the Web site. This list does not currently name all of the exotic species in the state, but it does show many of them. It will be updated regularly with additional information. Microbes viral hemorrhagic septicemia Novirhabdovirus sp. West Nile virus Flavivirus sp. Zika virus Flavivirus sp. Fungi oak wilt Ceratocystis fagacearum chestnut blight Cryphonectria parasitica Dutch elm disease Ophiostoma novo-ulmi and Ophiostoma ulmi late blight Phytophthora infestans white-nose syndrome Pseudogymnoascus destructans butternut canker Sirococcus clavigignenti-juglandacearum Plants okra Abelmoschus esculentus velvet-leaf Abutilon theophrastii Amur maple* Acer ginnala Norway maple Acer platanoides sycamore maple Acer pseudoplatanus common yarrow* Achillea millefolium Japanese chaff flower Achyranthes japonica Russian knapweed Acroptilon repens climbing fumitory Adlumia fungosa jointed goat grass Aegilops cylindrica goutweed Aegopodium podagraria horse chestnut Aesculus hippocastanum fool’s parsley Aethusa cynapium crested wheat grass Agropyron cristatum wheat grass Agropyron desertorum corn cockle Agrostemma githago Rhode Island bent grass Agrostis capillaris tree-of-heaven* Ailanthus altissima slender hairgrass Aira caryophyllaea Geneva bugleweed Ajuga genevensis carpet bugleweed* Ajuga reptans mimosa Albizia julibrissin hollyhock Alcea rosea garlic mustard* Alliaria petiolata wild leek Allium ampeloprasum atroviolaceum onion Allium cepa spring onion Allium fistulosum leek Allium porrum garlic Allium sativum chives Allium schoenoprasum field garlic Allium vineale black alder Alnus glutinosa meadow foxtail Alopecurus pratensis pale alyssum Alyssum alyssoides tumbleweed Amaranthus albus sandhills amaranth Amaranthus arenicola purple amaranth Amaranthus cruentus green pigweed Amaranthus hybridus prince’s feather Amaranthus hypochondriacus careless weed Amaranthus palmeri tall amaranth Amaranthus powellii rough pigweed Amaranthus retroflexus spiny pigweed Amaranthus spinosus sweet sultan Amberboa moschata false ragweed Ambrosia tomentosa broomweed Amphiachyris dracunculoides tarweed Amsinckia lycopsoides fiddleneck Amsinckia spectabilis scarlet pimpernel Anagallis arvensis pearly everlasting Anaphalis margaritacea common alkanet Anchusa officinalis sand bluestem Andropogon hallii dill Anethum graveolens anoda Anoda cristata corn chamomile Anthemis arvensis dog-fennel Anthemis cotula yellow chamomile Anthemis tinctoria annual sweet grass Anthoxanthum aristatum sweet vernal grass Anthoxanthum odoratum chervil Anthriscus cerefolium chervil Anthriscus sylvestris common snapdragon Antirrhinum majus garden columbine Aquilegia vulgaris mouse-ear cress Arabidopsis thaliana Japanese angelica tree Aralia elata great burdock Arctium lappa common burdock Arctium minus cotton burdock Arctium tomentosum thyme-leaved sandwort Arenaria serpyllifolia white prickly poppy Argemone albiflora Mexican poppy Argemone mexicana horseradish Armoracia rusticana tall oat grass Arrhenatherum elatius southern wormwood Artemisia abrotanum common wormwood Artemisia absinthium annual wormwood Artemisia annua biennial wormwood Artemisia biennis prairie sagebrush Artemisia frigida Roman wormwood Artemisia pontica common mugwort Artemisia vulgaris arum Arum italicum giant reed Arundo donax showy milkweed Asclepias speciosa asparagus Asparagus officinalis madwort Asperugo procumbens expressway aster Aster subulatus Tartarian aster Aster tataricus field milk vetch Astragalus agrestis silver orach Atriplex argentea smooth orach Atriplex glabriuscula garden orach Atriplex hortensis spear scale Atriplex patula red orach Atriplex rosea wild oats Avena fatua oats Avena sativa black horehound Ballota nigra costmary Balsamita major blue wild indigo Baptisia australis early winter cress Barbarea verna yellow rocket* Barbarea vulgaris blackberry lily* Belamcanda chinensis English daisy Bellis perennis Japanese barberry* Berberis thunbergii common barberry Berberis vulgaris hoary alyssum Berteroa incana borage Borago officinalis silver beardgrass Bothriochloa saccharoides rayless aster Brachyactis ciliata Indian mustard Brassica juncea rutabaga Brassica napus black mustard* Brassica nigra cabbage Brassica oleracea field mustard Brassica rapa big quaking grass Briza maxima chess Bromus arvensis rattlesnake chess Bromus briziformis California brome Bromus carinatus rescue grass Bromus catharticus hairy chess Bromus commutatus erect brome grass Bromus erectus soft chess Bromus hordeaceus awnless brome grass Bromus inermis Japanese chess Bromus japonicus brome grass Bromus marginatus chess Bromus racemosus smooth chess Bromus secalinus nodding bromus Bromus squarrosus brome grass Bromus sterilis downy chess Bromus tectorum paper mulberry* Broussonetia papyrifera ladies’ ear-drops Brunnichia ovata buffalo grass Buchloe dactyloides corn gromwell Buglossoides arvense thoroughwax Buplerum rotundifolium flowering rush Butomus umbellatus feathertop Calamagrostis epigeios reed grass Calamagrostis neglecta poppy mallow Callirhoe digitata poppy mallow Callirhoe involucrata strawberry shrub* Calycanthus floridus toothed evening primrose Calylophus serrulatus Japaenese bindweed Calystegia hederacea small-fruited false flax Camelina microcarpa false flax Camelina sativa clustered bellflower Campanula glomerata European bellflower Campanula rapunculoides Jack bean Canavalia ensiformis marijuana Cannabis sativa shepherd’s-purse Capsella bursa-pastoris pea tree Caragana arborescens hairy spring cress Cardamine hirsuta hoary cress Cardaria draba balloon-vine Cardiospermum halicacabum plumeless thistle Carduus acanthoides musk thistle* Carduus nutans Nebraska sedge Carex nebrascensis sedge Carex praegracilis spicate sedge Carex spicata needleleaf sedge Carex stenophylla caraway Carum carvi Chinese chestnut Castanea mollissima common catalpa Catalpa bignoniodes round-leaved bittersweet* Celastrus orbiculatus American basket-flower Centaurea americana spotted knapweed* Centaurea biebersteinii purple star thistle Centaurea calcitrapa spreading star thistle Centaurea diffusa brown knapweed Centaurea jacea Tyrolean knapweed Centaurea nigrescens black centaurea Centaurea nigra yellow star thistle Centaurea solstitialis shoey centaury Centaurium pulchellum mouse-eared chickweed Cerastium brachypetalum mouse-eared chickweed Cerastium diffusum mouse-eared chickweed Cerastium dubium clammy mouse-eared chickweed Cerastium glomeratum mouse-eared chickweed Cerastium pumilum mouse-eared chickweed Cerastium semidecandrum common mouse-eared chickweed Cerastium fontanum Japanese quince Chaenomeles japonica dwarf snapdragon Chaenorrhinum minus lion’s-tail Chaiturus marrubiastrum garden chamomile Chamaemelum nobile green creeping spurge Chamaesyce prostrata thyme-leaved spurge Chamaesyce serpyllifolia celandine Chelidonium majus lamb’s quarters Chenopodium album Mexican tea Chenopodium ambrosioides good King Henry Chenopodium bonus-henricus Jerusalem oak Chenopodium botrys strawberry blite Chenopodium capitatum oak-leaved goosefoot Chenopodium glaucum nettle-leaved goosefoot Chenopodium murale many-seeded goosefoot Chenopodium polyspermum aromatic goosefoot Chenopodium pumilio coast blite Chenopodium rubrum city goosefoot Chenopodium urbicum finger grass Chloris gayana windmill grass Chloris verticillata blue mustard Chorispora tenella chicory* Cichorium intybus Canada thistle* Cirsium arvense bull thistle Cirsium vulgare watermelon Citrullus lanatus virgin’s bower Clematis terniflora spider-flower Cleome hassleriana Rocky Mountain bee plant Cleome serrulata wild basil Clinopodium vulgare blessed thistle Cnicus benedictus collomia Collomia linearis common day-flower Commelina communis small day-flower Commelina diffusa poison hemlock Conium maculatum hare’s-ear mustard Conringia orientalis rocket larkspur Consolida ajacis larkspur Consolida regalis lily-of-the-valley Convallaria majalis field bindweed Convolvulus arvensis ashy bindweed Convolvulus incanus Coreopsis Coreopsis basalis large-flowered coreopsis Coreopsis grandiflora golden coreopsis Coreopsis tinctoria coriander Coriandrum sativum wart cress Coronopus didymus common cosmos Cosmos bipinnatus yellow cosmos Cosmos sulphureus English hawthorn Crataegus monogyna hawksbeard Crepis capillaris narrow-leaved hawksbeard Crepis tectorum showy rattlebox Crotalaria spectabilis Lindheimer’s croton Croton lindheimerianus Texas croton Croton texensis Crypsis Crypsis schoenoides cucumber Cucumis sativus Missouri gourd Cucurbita foetidissima pear gourd Cucurbita pepo ovifera common quince Cydonia oblonga Kenilworth ivy Cymbalaria muralis Bermuda grass Cynodon dactylon common hound’s-tongue Cynoglossum officinale compressed flatsedge Cyperus compressus flatsedge Cyperus filicinus rice-field flatsedge Cyperus iria reflexed flatsedge Cyperus retrorsus orchard grass* Dactylis glomerata foxtail Dalea Dalea leporina purple jimsonweed Datura stramonium hairy jimsonweed Datura wrightii Queen Anne’s lace* Daucus carota small wild carrot Daucus pusillus tansy mustard Descurainia pinnata brachycarpa flixweed Descurainia sophia pride-of-Rochester Deutzia scabra Deptford pink* Dianthus armeria sweet William Dianthus barbatus maiden pink Dianthus deltoides staggerweed Dicentra eximia ciliate crabgrass Digitaria ciliaris smooth crabgrass Digitaria