Invasive Species of Southeast New Hampshire

A short guide to some of the invasive species found in the southeastern corner of New Hampshire (area near Portsmouth).

All 104

Asiatic Knotweed ¹
Reynoutria japonica

Japanese Hops ²
Humulus japonicus

Norway maple ³
Acer platanoides

Tree of heaven ⁴
Ailanthus altissima

garlic mustard ⁵
Alliaria petiolata

European Alder ⁶
Alnus glutinosa

Japanese barberry ⁷
Berberis thunbergii

European barberry ⁸
Berberis vulgaris

Oriental bittersweet ⁹
Celastrus orbiculatus

spotted knapweed ¹⁰
Centaurea stoebe

Black Swallow-wort ¹¹
Vincetoxicum nigrum

European swallow-wort ¹²
Vincetoxicum rossicum

winged euonymus ¹³
Euonymus alatus

autumn olive ¹⁴
Elaeagnus umbellata

alder buckthorn ¹⁵
Frangula alnus

reed meadowgrass ¹⁶
Glyceria maxima

Giant Hogweed ¹⁷
Heracleum mantegazzianum

dame's rocket ¹⁸
Hesperis matronalis

Yellow Iris ¹⁹
Iris pseudacorus

Himalayan balsam ²⁰
Impatiens glandulifera

broadleaved pepperweed ²¹
Lepidium latifolium

Broad-leaf Waterleaf ²²
Hydrophyllum canadense

border privet ²³
Ligustrum obtusifolium

Common Privet ²⁴
Ligustrum vulgare

Amur honeysuckle ³
Lonicera maackii

Japanese honeysuckle ²⁵
Lonicera japonica

Tatarian honeysuckle ²⁶
Lonicera tatarica

Morrow's honeysuckle ²⁷
Lonicera morrowii

Bell's Honeysuckle ²⁸
Lonicera × bella

creeping Jenny ²⁹
Lysimachia nummularia

Giant Knotweed ³⁰
Reynoutria sachalinensis

kudzu ³¹
Pueraria montana

Japanese stiltgrass ³²
Microstegium vimineum

mile-a-minute weed ³³
Persicaria perfoliata

Bohemian Knotweed ³⁴
Reynoutria × bohemica

common buckthorn ³⁵
Rhamnus cathartica

multiflora rose ³⁶
Rosa multiflora

velvetleaf ³⁷
Abutilon theophrasti

Amur Maple ³⁸
Acer ginnala

corn cockle ²⁵
Agrostemma githago

Silver Hairgrass ³²
Aira caryophyllea

wild garlic ³⁹
Allium vineale

false indigo ⁴⁰
Amorpha fruticosa

Japanese angelica tree ⁴¹
Aralia elata

bitter wintercress ⁴²
Barbarea vulgaris

Brown Mustard ⁴³
Brassica juncea

Black Mustard ⁴⁴
Brassica nigra

cheatgrass ⁴⁵
Bromus tectorum

narrow-leaved bittercress ⁴⁶
Cardamine impatiens

Brown Knapweed ⁴⁷
Centaurea jacea

black knapweed ²⁵
Centaurea nigra

Greater celandine ⁴⁸
Chelidonium majus

Marsh Thistle ⁴⁹
Cirsium palustre

bull thistle ⁵⁰
Cirsium vulgare

field bindweed ⁵¹
Convolvulus arvensis

common broom ⁵²
Cytisus scoparius

Hairy Crabgrass ⁵³
Digitaria sanguinalis

common water hyacinth ⁵⁴
Eichhornia crassipes

Quack Grass
Elymus repens

Great Willowherb ⁵⁵
Epilobium hirsutum

broad-leaved helleborine ⁵⁶
Epipactis helleborine

Spindle ⁵⁷
Euonymus europaeus

fortune's spindle ⁵⁸
Euonymus fortunei

Fine-leaved Sheep's-fescue ⁵⁹
Festuca filiformis

lesser celandine ⁶⁰
Ficaria verna

Slender Snakecotton ⁶¹
Froelichia gracilis

Hedge Bedstraw ⁵⁷
Galium mollugo

ground-ivy ⁶²
Glechoma hederacea

Orpine ⁶³
Hylotelephium telephium

Kochia scoparia ⁶⁴
Bassia scoparia

henbit deadnettle ⁶⁵
Lamium amplexicaule

red deadnettle ⁶⁶
Lamium purpureum

Fly Honeysuckle ⁶⁷
Lonicera xylosteum

Large-leaved lupine ⁶⁸
Lupinus polyphyllus

Lychnis flos-cuculi ⁶⁹
Silene flos-cuculi

scarlet pimpernel ⁷⁰
Lysimachia arvensis

Yellow Loosestrife ⁷¹
Lysimachia vulgaris

Chinese silver grass
Miscanthus sinensis

Wall Lettuce ⁷²
Mycelis muralis

water forget-me-not ⁵⁰
Myosotis scorpioides

Narrow-fruited Watercress ⁷³
Nasturtium microphyllum

watercress ⁷⁴
Nasturtium officinale

Java water-dropwort ⁷⁵
Oenanthe javanica

low smartweed ⁷⁶
Persicaria longiseta

Amur Corktree ⁷⁷
Phellodendron amurense

Flattened Meadow-grass ⁷⁸
Poa compressa

Wood Meadow-grass ⁷⁹
Poa nemoralis

white poplar ⁸⁰
Populus alba

Creeping buttercup ⁶⁹
Ranunculus repens

Jointed Charlock ⁸¹
Raphanus raphanistrum

Yellow Rattle ⁸²
Rhinanthus minor

Sheep's sorrel ⁸³
Rumex acetosella

purple crownvetch ⁷⁴
Securigera varia

cup plant ³⁶
Silphium perfoliatum

Wild Mustard ⁸⁴
Sinapis arvensis

Carolina horsenettle ⁸⁵
Solanum carolinense

bittersweet nightshade ⁸⁶
Solanum dulcamara

Perennial Sow Thistle ⁸⁷
Sonchus arvensis

Sorbaria ⁸⁸
Sorbaria sorbifolia

tansy ⁸⁹
Tanacetum vulgare

Edited by Brendon Barnes, some rights reserved (CC BY-NC)

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