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

Cirsium vulgare (Savi) Ten. ³⁷
Vireo caribaeus

velvetleaf ³⁸
Abutilon theophrasti

Amur Maple ³⁹
Acer ginnala

corn cockle ²⁵
Agrostemma githago

Silver Hairgrass ³²
Aira caryophyllea

wild garlic ⁴⁰
Allium vineale

false indigo ⁴¹
Amorpha fruticosa

Japanese angelica tree ⁴²
Aralia elata

bitter wintercress ⁴³
Barbarea vulgaris

Brown Mustard ⁴⁴
Brassica juncea

Black Mustard ⁴⁵
Brassica nigra

cheatgrass ⁴⁶
Bromus tectorum

narrow-leaved bittercress ⁴⁷
Cardamine impatiens

Brown Knapweed ⁴⁸
Centaurea jacea

black knapweed ²⁵
Centaurea nigra

Greater celandine ⁴⁹
Chelidonium majus

Marsh Thistle ⁵⁰
Cirsium palustre

bull thistle ⁵¹
Cirsium vulgare

field bindweed ⁵²
Convolvulus arvensis

common broom ⁵³
Cytisus scoparius

Hairy Crabgrass ⁵⁴
Digitaria sanguinalis

common water hyacinth ⁵⁵
Eichhornia crassipes

Quack Grass
Elymus repens

Great Willowherb ⁵⁶
Epilobium hirsutum

broad-leaved helleborine ⁵⁷
Epipactis helleborine

Spindle ⁵⁸
Euonymus europaeus

fortune's spindle ⁵⁹
Euonymus fortunei

Fine-leaved Sheep's-fescue ⁶⁰
Festuca filiformis

lesser celandine ⁶¹
Ficaria verna

Slender Snakecotton ⁶²
Froelichia gracilis

Hedge Bedstraw ⁵⁸
Galium mollugo

ground-ivy ⁶³
Glechoma hederacea

Orpine ⁶⁴
Hylotelephium telephium

Kochia scoparia ⁶⁵
Bassia scoparia

henbit deadnettle ⁶⁶
Lamium amplexicaule

red deadnettle ⁶⁷
Lamium purpureum

Fly Honeysuckle ⁶⁸
Lonicera xylosteum

Large-leaved lupine ⁶⁹
Lupinus polyphyllus

Lychnis flos-cuculi ⁷⁰
Silene flos-cuculi

scarlet pimpernel ⁷¹
Lysimachia arvensis

Yellow Loosestrife ⁷²
Lysimachia vulgaris

Chinese silver grass
Miscanthus sinensis

Wall Lettuce ⁷³
Mycelis muralis

water forget-me-not ⁵¹
Myosotis scorpioides

Narrow-fruited Watercress ⁷⁴
Nasturtium microphyllum

watercress ⁷⁵
Nasturtium officinale

Java water-dropwort ⁷⁶
Oenanthe javanica

low smartweed ⁷⁷
Persicaria longiseta

Amur Corktree ⁷⁸
Phellodendron amurense

Flattened Meadow-grass ⁷⁹
Poa compressa

Wood Meadow-grass ⁸⁰
Poa nemoralis

white poplar ⁸¹
Populus alba

Creeping buttercup ⁷⁰
Ranunculus repens

Jointed Charlock ⁸²
Raphanus raphanistrum

Yellow Rattle ⁸³
Rhinanthus minor

Sheep's sorrel ⁸⁴
Rumex acetosella

purple crownvetch ⁷⁵
Securigera varia

cup plant ³⁶
Silphium perfoliatum

Wild Mustard ⁸⁵
Sinapis arvensis

Carolina horsenettle ⁸⁶
Solanum carolinense

bittersweet nightshade ⁸⁷
Solanum dulcamara

Perennial Sow Thistle ⁸⁸
Sonchus arvensis

Sorbaria ⁸⁹
Sorbaria sorbifolia

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

Photo Credits

1. (c) Maja Dumat, some rights reserved (CC BY)
2. (c) Melinda Fawver, some rights reserved (CC BY-NC), uploaded by Melinda Fawver
3. (c) Sara Rall, some rights reserved (CC BY-NC), uploaded by Sara Rall
4. (c) Mattia Menchetti, some rights reserved (CC BY), uploaded by Mattia Menchetti
5. (c) 57Andrew, some rights reserved (CC BY-NC-ND)
6. (c) AnneTanne, some rights reserved (CC BY-NC-SA)
7. (c) James Gaither, some rights reserved (CC BY-NC-ND)
8. (c) Werner Witte, some rights reserved (CC BY-NC)
9. (c) sara, some rights reserved (CC BY-NC), uploaded by sara
10. (c) Kutushev Radik, some rights reserved (CC BY-NC), uploaded by Kutushev Radik
11. (c) jacinta lluch valero, some rights reserved (CC BY-SA)
12. (c) Don Sutherland, some rights reserved (CC BY-NC), uploaded by Don Sutherland
13. (c) Claire O'Neill, some rights reserved (CC BY-NC), uploaded by Claire O'Neill
14. (c) D.J. McNeil, some rights reserved (CC BY-NC), uploaded by D.J. McNeil
15. (c) Sten Porse, some rights reserved (CC BY-SA)
16. (c) anonymous, some rights reserved (CC BY-SA)
17. (c) Nova Patch (they/them), some rights reserved (CC BY-SA), uploaded by Nova Patch (they/them)
18. (c) Owen Wolter, some rights reserved (CC BY-NC-ND)
19. (c) Rita Willaert, some rights reserved (CC BY-NC)
20. (c) Roy Wichert-Gonsalves, some rights reserved (CC BY-NC-ND)
21. (c) Jenn Forman Orth, some rights reserved (CC BY-NC-SA)
22. (c) Jonathan (JC) Carpenter, some rights reserved (CC BY-NC), uploaded by Jonathan (JC) Carpenter
23. (c) Dalgial, some rights reserved (CC BY-SA)
24. (c) nidge, some rights reserved (CC BY-NC), uploaded by nidge
25. (c) Anita, some rights reserved (CC BY-NC-SA)
26. (c) Leo Papandreou, some rights reserved (CC BY-NC-SA)
27. (c) Tyler Christensen, some rights reserved (CC BY-NC), uploaded by Tyler Christensen
28. (c) Cody Hough, some rights reserved (CC BY-NC-SA)
29. (c) Mark Denovich, some rights reserved (CC BY-NC-SA)
30. (c) own work, some rights reserved (CC BY-SA)
31. (c) Matt Lavin, some rights reserved (CC BY-SA)
32. (c) botanygirl, some rights reserved (CC BY), uploaded by botanygirl
33. (c) Vilseskogen, some rights reserved (CC BY-NC-SA)
34. (c) Sergey Mayorov, some rights reserved (CC BY-NC), uploaded by Sergey Mayorov
35. (c) JanetandPhil, some rights reserved (CC BY-NC-ND)
36. (c) Dan Mullen, some rights reserved (CC BY-NC-ND)
37. (c) Thibaud Aronson, some rights reserved (CC BY-SA), uploaded by Thibaud Aronson
38. (c) John Beetham, some rights reserved (CC BY-NC-SA)
39. (c) TreesOfTheWorld.net, some rights reserved (CC BY-NC-SA)
40. (c) Jason Sturner, some rights reserved (CC BY)
41. (c) Susan Elliott, some rights reserved (CC BY-NC), uploaded by Susan Elliott
42. (c) Stephanie Lorek, some rights reserved (CC BY-NC), uploaded by Stephanie Lorek
43. (c) amlambert11, some rights reserved (CC BY-NC), uploaded by amlambert11
44. (c) Dinesh Valke, some rights reserved (CC BY-NC-SA)
45. no rights reserved, uploaded by Jesse Rorabaugh
46. (c) Biopix, some rights reserved (CC BY-NC)
47. (c) Fluff Berger, some rights reserved (CC BY-SA), uploaded by Fluff Berger
48. (c) Dendroica cerulea, some rights reserved (CC BY)
49. (c) revaz, some rights reserved (CC BY-NC), uploaded by revaz
50. (c) Peter Hanegraaf, some rights reserved (CC BY-NC-ND)
51. (c) beautifulcataya, some rights reserved (CC BY-NC-ND)
52. (c) Michael Kappel, some rights reserved (CC BY-NC)
53. (c) wayne tucker, some rights reserved (CC BY-ND)
54. (c) aarongunnar, some rights reserved (CC BY), uploaded by aarongunnar
55. (c) Gustavo DurÃ¡n, some rights reserved (CC BY-NC-SA)
56. (c) José María Escolano, some rights reserved (CC BY-NC-SA)
57. (c) Paul Cools, some rights reserved (CC BY-NC), uploaded by Paul Cools
58. (c) Bonnie Kinder, some rights reserved (CC BY-NC), uploaded by Bonnie Kinder
59. (c) Melissa McMasters, some rights reserved (CC BY)
60. (c) Petr Filippov, some rights reserved (CC BY-SA)
61. (c) Bernard Picton, some rights reserved (CC BY), uploaded by Bernard Picton
62. (c) Linda Jo Conn, some rights reserved (CC BY-NC), uploaded by Linda Jo Conn
63. (c) Jade Nature ❤️, some rights reserved (CC BY-NC), uploaded by Jade Nature ❤️
64. (c) bodhiheera, some rights reserved (CC BY-NC), uploaded by bodhiheera
65. (c) Patrick Alexander, some rights reserved (CC BY-NC-ND)
66. (c) Kostas Zontanos, some rights reserved (CC BY-NC), uploaded by Kostas Zontanos
67. (c) Bastiaan, some rights reserved (CC BY-NC-ND)
68. (c) else15, some rights reserved (CC BY-NC), uploaded by else15
69. (c) kevinhintsa, some rights reserved (CC BY-NC), uploaded by kevinhintsa
70. (c) AnneTanne, some rights reserved (CC BY-NC)
71. (c) Bas Kers (NL), some rights reserved (CC BY-NC-SA)
72. (c) Mick Talbot, some rights reserved (CC BY-NC-SA)
73. (c) Kristian Peters, some rights reserved (CC BY-NC-SA)
74. (c) bbi2, some rights reserved (CC BY-NC), uploaded by bbi2
75. (c) Jerry Oldenettel, some rights reserved (CC BY-NC-SA)
76. (c) Kim, Hyun-tae, some rights reserved (CC BY), uploaded by Kim, Hyun-tae
77. (c) harum.koh, some rights reserved (CC BY-SA), uploaded by harum.koh
78. (c) Ryan Somma, some rights reserved (CC BY)
79. (c) Bas Kers, some rights reserved (CC BY-NC-SA)
80. (c) anonymous, some rights reserved (CC BY-NC)
81. (c) Sarah Gregg, some rights reserved (CC BY-NC-SA)
82. (c) Dawn Endico, some rights reserved (CC BY-SA)
83. (c) Steve Chilton, some rights reserved (CC BY-NC-ND)
84. (c) randomtruth, some rights reserved (CC BY-NC-SA)
85. (c) Ferran Turmo Gort, some rights reserved (CC BY-NC-SA)
86. (c) zen Sutherland, some rights reserved (CC BY-NC-SA)
87. (c) Sander Bos, some rights reserved (CC BY-NC-ND)
88. (c) Frank Mayfield, some rights reserved (CC BY-SA)
89. (c) Kerry Woods, some rights reserved (CC BY-NC-ND)

Member of the iNaturalist Network | Powered by iNaturalist open source software | Documentation for developers