Crisp Invasive Species

2018 Invasive Species Categorization for the Catskill Regional Invasive Species Partnership


2018 Invasive Species Categorization

This categorization of Invasive Species in the Catskill Regional Invasive Species Partnership (CRISP) attempts to prioritize invasive species based on the ability of CRISP to perform prevention, early detection and control efforts for these invasive species based on the species invasiveness (according to NYS ranking evaluation) and distribution (according to iMapInvasives and expert knowledge).

The Invasive Species Tiers were developed between New York State iMapInvasive staff and the Partnership for Regional Invasive Species Management Coordinators. Each very high, or high, impact invasive species is assigned to the following tiers:


Tier 1 Early Detection/Prevention

Highest level of early detection survey efforts. Should conduct detection surveys and assign to appropriate Tier if detected.

1a) Inside Buffer 

(within 100 miles of PRISM), but not in PRISM

1b) Outside PRISM and Buffer

but close (Eastern North America)

1c) Far outside PRISM and Buffer 

(not in Eastern North America), but introduction pathway exists.

Tier 2 Eradication

Highest level of early detection response efforts. High impact species with low enough abundance and suitable treatment method available to make eradication feasible within the PRISM. Need delineation surveys to determine extent.

Tier 3 Containment

Target strategic management to slow the spread (e.g. remove outlying and border populations), as likely too widespread for eradication, but many surrounding regions could be at risk if left unattended. Use IPMDAT for plants. Possible eradication candidate only if adequate resources and effective control methods available.

Tier 4 Local Control

Eradication from PRISM not feasible; focus on localized management over time to contain, exclude, or suppress to protect high-priority resources like rare species or recreation assets.  Be strategic when deciding if/where to control.

Tier 5 Monitor

Species that need more research, mapping, and monitoring to understand their invasiveness.  This includes naturalized species and cultivated-only species that are known to be invasive in other regions but are not yet invasive here. Invasiveness may change with environmental or genetic changes.  Should monitor populations on a regular basis to see if they are starting to become invasive and assign to appropriate Tier if invasive infestations detected.

The following table summarize the species according to NYS Rank. Species rank represents assessment of that species’ invasiveness in NYS.

VH = Very High, H = High, M = Moderate, L = Low, I = Insignificant, U = Unknown.


Tier 1 Species:

are not known to occur within the PRISM boundary but represent a high potential for spread and establishment if introduced. Goals for these species are Early Detection/Prevention.


Aquatic Animals

Scientific Name Common Name NYS Rank
Bythotrephes longimanusSpiny Waterflea H
Cercopagis pengoi Fishhook WaterfleaH
Channa argus Northern Snakehead H
Dreissena bugensis Quagga Mussel H
Hemimysis anomalaBloody red shrimp H
Neogobius melanostomuRound Goby H

 Terrestrial Animals

Scientific Name Common Name NYS Rank
Cygnus olor Mute SwanH
Sus scrofaFeral Swine, Wild BoarVH


Scientific Name Common Name NYS Rank
Anoplophora glabripennisAsian-longhorned BeetleH
Lycorma delicatulaSpotted lanternflyH
Sirex noctilioEuropen wood waspH

Aquatic Plants

Scientific NameCommon NameNYS Rank
Butomous umbellatusFlowering RushH
Egeria densa Brazilian WaterweedH
Hydrilla verticillata HydrillaVH
Hydrocharis morsus-ranaeCommon FrogbitVH
Myriophyllum heterophyllum Broadleaf WatermilfoilVH
Pistia stratiotesWater Lettuce
Myriophyllum aquaticumParrot featherH

Terrestrial Plants

Scientific NameCommon Name NYS Rank
Actinidia arguta Hardy KiwiU-H?
Actinidia polygama Silver VineU-H?
Arthraxon hispidus Small Carpetgrass; Hairy Joint GrassH
Brachypodium sylvaticum ssp. sylvaticum Slender FalsebromeVH
Corydalis incisa Incised Fumewort U-H?
Cytisus scoparius Scotch BroomU-H?
Phellodendron amurenseAmur Corktree; Amur cork tree; Amur corkH
Photinia villosa Oriental photinia; Oriental redtipu-H?
Pueraria montana var. lobata Kudzu, Japanese arrowrootVH
Salix atrocinerea Rusty WillowVH
Salix cinerea European Gray Willow, Gray Florist's WillowVH
Salvia glutinosaSticky SageH
Silphium perfoliatum var. perfoliatum Cup-plant, Indian cup plantH
Viburnum dilatatumLinden ArrowwoodM
Viburnum plicatum Japanese Snowball U
Ceratocystis fagacearumOak Wilt
Oplismenus hirtellusWavy basketgrassH

Tier 2 Species:

are known to occur at currently low population within the PRISM boundary. All are potentially high impact and currently low abundance, with known control measures that make Eradication attainable as a Management Goal.


Aquatic Animal

Scientific NameCommon NameNYS Rank
Cipangopaludina chinensisChinese MysterysnailVH

Aquatic Plants

Scientific NameCommon NameNYS Rank
Aldrovanda vesiculosaWaterwheel plantU-H?
Cabomba carolinianaFanwort; Carolina FanwortH
Eichhornia crassipes Water HyacinthU-H?
Ludwigia peploides ssp. glabrescensFloating Primrose WillowVH
Nymphoides peltataYellow Floating-heart, Yellow floating heartH

Terrestrial Plants

Scientific NameCommon NameNYS Rank
Acer pseudoplatanusSycamore MapleH
Akebia quinata Five-leaf Akebia; Chocolate Vine; Fiveleaf AkebiaM-h?
Ampelopsis brevipedunculataPorcelain Berry, Amur Pepper-vine, Porcelain-berry, Porcelainberry, Amur peppervineH
Aralia elata Japanese Angelica TreeVH
Cardamine impatiensNarrowleaf Bittercress, Bushy Rock-cressH
Carlina vulgarisCarline Thistle U-H?
Clematis terniflora Japanese Virgin's bower H
Daphne mezereumDaphneU-M-H?
Dipsacus laciniatusCut-leaf Teasel; Cutleaf teasel; Cut-leaved teaselH
Ficaria verna ssp. vernaLesser celandine, Fig ButtercupVH
Humulus japonicusJapanese HopsH
Miscanthus sinensis Chinese Silver Grass; Eulalia; Chinese silvergrass; Maiden grassH
Paulownia tomentosaPrincess Tree, Empress Tree, Royal PaulowniaM
Persicaria perfoliataMile-a-minute Weed, Mile-a-minute Vine, Asiatic Tearthum, Mile a minute weedH
Reynoutria x bohemica : Fallopia x bohemica Bohemian knotweedVH
Rhodotypos scandensBlack Jetbead, JetbeadM
Rubus phoenicolasiusWineberry, Japanese Wineberry, Wine RaspberryVH
Syringa reticulataJapanese Tree LilacU

Tier 3 Species:

are species which are too high abundance within the PRISM boundary for Eradication to be likely. Management goal is Containment, unless particularly effective control methods or adequate funding sources become available. The IPMDAT tool should be used to assess individual populations for management.


 Aquatic Animals

Scientific Name Common NameNYS Rank
Bithynia tentaculataMud BithyniaH
Corbicula flumineaAsian ClamH
Misgurnus anguillicaudatusOriental WeatherfishVH


Scientific NameCommon NameNYS Rank
Adelges piceaeBalsam Woolly Adelgid U-M?

Aquatic Plants

Scientific NameCommon NameNYS Rank
Nitellopsis obtusaStarry StonewortU-H?
Trapa natansWater Chestnut, Water-chestnutVH

Terrestrial Plants

Scientific NameCommon NameNYS Rank
Cynanchum louiseaeBlack Swallow-wort, Louise's Swallow-wort, Dog-strangling VineVH
Euphorbia cyparissiasCypress SpurgeH
Frangula alnus Glossy Buckthorn, European Buckthorn, Smooth buckthornH
Heracleum mantegazzianumGiant HogweedH
Impatiens glanduliferaPolicemen's Helmet, Ornamental Jewelweed, Himalayan Balsam, Purple JewelweedU-M?
Iris pseudacorusYellow Iris, Water-flag, Yellow flag iris, Water flag, Yellow flagH
Ligustrum obtusifoliumBorder PrivetH
Lonicera maackiiAmur Honeysuckle VH
Lysimachia vulgaris Garden Loosestrife, Yellow Garden LoosestrifeH

Tier 4 Species:

are too high abundance for Eradication on a regional scale to be likely even with outside funding sources. Management Strategy for Tier 4 Species is long-term localized Suppression or Containment. Use the IPMDAT to assess individual populations for control.


 Aquatic Animals

Scientific Name Common NameNYS Rank
Carassius auratusGoldfishVH
Cyprinus carpioCommon CarpVH
Dreissena polymorphaZebra MusselVH
Orconectes rusticusRusty CrayfishH
Petromyzon marinusSea LampreyM


Scientific NameCommon NameNYS Rank
Adelges tsugaeHemlock Woolly AdelgidH
Agrilus planipennisEmerald Ash BorerVH
Drosophila suzukiiSpotted Wing DrosophilaU-H?
Halyomorpha halysBrown Marmorated Stink BugU-M?
Lymantria disparGypsy Moth H

Aquatic Plants

Scientific NameCommon NameNYS Rank
Didymosphenia geminataDidymo Rock snotU-H?
Myriophyllum spicatum Eurasian Water-milfoil; European Water-milfoil; Spike Water-milfoil; Eurasian watermilfoilVH
Potamogeton crispusCurly Pondweed; Crisped Pondweed; Curly-leaf pondweed; Curlyleaf pondweed; Crispy-leaved pondweedH

Terrestrial Plants

Scientific NameCommon NameNYS Rank
Acer platanoidesNorway MapleVH
Ailanthus altissimaTree-of-heaven, Tree of Heaven, Chinese Sumac, Ailanthus, Varnish-tree, Copa-treeM-h?
Alliaria petiolataGarlic MustardVH
Anthriscus sylvestrisWild ChervilH
Artemisia vulgaris var. vulgarisMugwort H
Berberis thunbergiiJapanese BarberryVH
Celastrus orbiculatusOriental Bittersweet; Asian BittersweetVH
Centaurea stoebe spp. micranthosSpotted Starthistle, Spotted KnapweedH
Cirsium arvense Canada Thistle, Creeping ThistleH
Cirsium palustre European Marsh ThistleM
Elaeagnus umbellataAutumn Olive, Autumn-oliveVH
Euonymus alatusBurning Bush, Winged Euonymus, Winged Burning Bush, Winged SpindletreeVH
Lonicera japonicaJapanese HoneysuckleVH
Lonicera morrowiiMorrow Honeysuckle, Morrows honeysuckleVH
Lonicera spp (species unknown)Honeysuckle (species unknown)VH
Lonicera tataricaTartarian HoneysuckleVH
Lonicera x bellaFly Honeysuckle, Showy pink honeysuckle, Bell's honeysuckleVH
Lonicera xylosteum European Fly-honeysuckle, Dwarf Honeysuckle, European fly honeysuckleU-H?
Lythrum salicariaPurple LoosestrifeVH
Microstegium vimineumJapanese Stiltgrass, Nepalese Browntop, Japanese stilt grass, NepalgrassVH
Pastinaca sativaWild ParsnipU-H?
Phalaris arundinaceaReed Canarygrass H
Phragmites australis ssp. australisCommon Reed, Common reed grassVH
Reynoutria japonica var. japonica : Fallopia japonica var. japonicaJapanese Knotweed, Japanese BambooVH
Rhamnus catharticaCommon BuckthornVH
Robinia pseudoacaciaBlack LocustVH
Rosa multifloraMultiflora Rose, Rambler RoseVH

Tier 5 Species:

are species that need more research, mapping, or monitoring to understand their invasiveness. This includes naturalized species and cultivated-only species that are known to be invasive in other regions but are not yet invasive here. Invasiveness may change with environmental or genetic changes.  Should monitor populations on a regular basis to see if they are starting to become invasive and assign to appropriate Tier if invasive infestations detected.


 Aquatic Animals

Scientific Name Common NameNYS Rank
Eubosmina coregoniWater Flea, a CladoceranU
Lepomis cyanellusGreen SunfishU
Orconectes virilisVirile CrayfishU
Scardinius erythrophthalmusRuddU


Scientific NameCommon NameNYS Rank
Fiorinia externa Elongate Hemlock Scaleu

Aquatic Plants

Scientific NameCommon NameNYS Rank
Marsilea quadrifoliaEuropean Water Fern; European WatercloverU

Terrestrial Plants

Scientific NameCommon NameNYS Rank
Allium vinealeWild Garlic, Field GarlicU-L?
Alnus glutinosaEuropean Alder, Black AlderU
Artemisia absinthiumWormwood, Common WormwoodU
Bromus inermisSmooth bromeU
Buddleja davidiiOrange-eye Butterfly-bushL
Capsella bursa-pastorisCommon Shepherd's Purse; Shepherd's PurseU-L?
Cardamine hirsutaHairy Bitter-cressU
Catalpa speciosa Northern CatalpaU-L?
Centaurea nigrescensShort-fringe Starthistle, Knapweed, Tyrol knapweedU
Centaurea solstitialisYellow Star-thistleU
Commelina communis var. communisAsiatic DayflowerU-L?
Crataegus monogynaHawthorn, English HawthornU
Digitalis lanata Grecian FoxgloveL
Digitaria ischaemumSmooth CrabgrassU-L?
Digitaria sanguinalisHairy CrabgrassU
Duchesnea indica Indian Mock-strawberry, Indian StrawberryU-L?
Eleutherococcus pentaphyllus Five-leaved aralia U
Elsholtzia ciliata Crested Elsholtzia, Crested Late-summer Mint, Crested latesummer mintU-L?
Galium odoratumSweet Bedstraw, WoodruffL
Geranium sibiricumSiberian Crane's-billU-L?
Hemerocallis fulvaOrange Daylily, Tawny Daylily, Day lily, Day-lilyL
Hieracium piloselloidesKingdevil, King-devil, Tall Hawkweed U-L?
Hylotelephium spectabileShowy StonecropU-L?
Hylotelephium telephiumGarden Stonecrop, Live ForeverU-L?
Ipomoea hederaceaMorning Glory; Ivy-leaved Morning GloryU-L?
Kolkwitzia amabilisBeautybushU-L?
Lathyrus odoratusSweetpeaU-L?
Lepidium campestre Field Pepper-grassU-L?
Lepidium densiflorum var. densiflorumCommon PepperweedU-L?
Lotus tenuisSlender Trefoil U
Lupinus polyphyllus var. polyphyllusBigleaf Lupine, Giant LupineU-h?
Malus baccataSiberian Crabapple, CrabappleU
Malus spp. (species unknown)Crabapple (species unknown) U
Mycelis muralisWall LettuceU-M?
Ornithogalum umbellatum Common Star-of-Bethlehem, Star of Bethlehem, Star-of-BethelehemU-L?
Persicaria nepalensisNepal SmartweedU
Petasites hybridusPestilence wort, Purple Butter-burU
Robinia hispidaBristly LocustL
Rosa caninaDog RoseU
Salix fragilisCrack Willow; Brittle WillowU
Salix purpureaBasket Willow, Purpleosier WillowU
Salix x pendulinaWisconsin Weeping WillowU
Sedum sarmentosumStringy StonecropU-L?
Torilis japonicaErect Hedge-parsley; Japanese Hedge-parsleyU-H?
Typha x glaucaBlue Cat-tail, Hybrid Cat-tailU-H?