A guide to nonnative invasive plants inventoried in the north by ...

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Robinia pseudoacacia Black locust ROPS Form: Deciduous tree 65-80 ft (20-25 m) tall. Bark is gray or light brown, thick and fibrous, heavily ridged and furrowed when older, resembles a woven rope. Leaves: Alternate, once-compound leaves. Leaflets 6-20, egg-shaped, margins entire, ¾-1½ in. (2-4 cm) long. Older twigs with pair of thick spines at leaf base. Flowers/fruit: Blooms in mid to late spring. Flowers fragrant, white, 1 in. (2.5 cm) long and pea-like, borne in long 4-8 in. (10-20 cm) hanging clusters. Fruit is a flattened legume, mottled, light brown, 2-4 in. (5-10 cm) long; containing 4 to 8 kidney-shaped, smooth, red-brown seeds; ripening in the fall. Habitat: Cove forests, open upland slopes, fence rows, disturbed ground, and limestone soils. Other distinguishing features/notes: Sunken, white-hairy buds burst through leaf scars in spring. Native to the eastern seaboard but widely escaping elsewhere. Similar species: Prickly ash (Zanthoxylum americanum) is smaller and has reddish exposed buds, minutely toothed leaflets, and usually spiny leafstalks. Honey-locust (Gleditsia tricanthos) has smaller leaflets and branched unpaired thorns along the twigs. Notes
Elizabeth Czarapata Robinia pseudoacacia Black locust Elizabeth Czarapata Elizabeth Czarapata Elizabeth Czarapata
Page 1 and 2: United States Department of Agricul
Page 3 and 4: A Guide to Nonnative Invasive Plant
Page 5 and 6: Tree Species Contents Acer platanoi
Page 7 and 8: Acer platanoides Norway maple ACPL
Page 9 and 10: Paul Wray, Iowa State University, w
Page 11 and 12: Ailanthus altissima Tree-of-heaven
Page 13 and 14: Barbara Tokarska-Guzik, University
Page 15 and 16: Albizia julibrissin Silktree ALJU J
Page 17 and 18: James H. Miller, U.S. Forest Servic
Page 19 and 20: Elaeagnus angustifolia Russian oliv
Page 23 and 24: Melaleuca quinquenervia Punktree ME
Page 25 and 26: Amy Ferritar, South Florida Water M
Page 27 and 28: Melia azedarach Chinaberry MEAZ Jam
Page 31 and 32: Paulownia tomentosa Princesstree PA
Page 33 and 34: James Allison, Georgia Department o
Page 35: Robinia pseudoacacia Black locust R
Page 39 and 40: Tamarix ramosissima Saltcedar TARA
Page 41 and 42: Steve Dewey, Utah State University,
Page 43 and 44: Triadica sebifera Tallow tree TRSE6
Page 45 and 46: Chris Evans, University of Georgia,
Page 47 and 48: Ulmus pumila Siberian elm ULPU Stev
Page 49 and 50: Patrick Breen, Oregon State Univers
Page 51 and 52: Berberis thunbergii Japanese barber
Page 53 and 54: Berberis thunbergii Japanese barber
Page 55 and 56: Berberis vulgaris Common barberry B
Page 57 and 58: Leslie J. Mehrhoff, University of C
Page 59 and 60: Elaeagnus umbellata Autumn olive EL
Page 61 and 62: Chris Evans, University of Georgia,
Page 63 and 64: Frangula alnus Glossy buckthorn FRA
Page 65 and 66: © John M. Randall, The Nature Cons
Page 67 and 68: Ligustrum vulgare European privet L
Page 69 and 70: Kelly Kearns, Wisconsin DNR Ligustr
Page 71 and 72: Lonicera x bella Showy fly honeysuc
Page 73 and 74: Lonicera x bella Showy fly honeysuc
Page 75 and 76: Lonicera maackii Amur honeysuckle L
Page 79 and 80: Lonicera morrowii Morrow’s honeys
Page 81 and 82: © John M. Randall, The Nature Cons
Page 83 and 84: Lonicera tatarica Tatarian honeysuc
Page 85 and 86: Patrick Breen, Oregon State Univers
Page 87 and 88:
Rhamnus cathartica Common buckthorn
Page 89 and 90:
Elizabeth Czarapata Leslie J. Mehrh
Page 91 and 92:
Rosa multiflora Multiflora rose ROM
Page 93 and 94:
James H. Miller, U.S. Forest Servic
Page 95 and 96:
Spiraea japonica Japanese meadowswe
Page 97 and 98:
Page 99 and 100:
Viburnum opulus European cranberryb
Page 101 and 102:
Viburnum opulus European cranberryb
Page 103 and 104:
Celastrus orbiculatus Asian bitters
Page 105 and 106:
Celastrus orbiculatus Asian bitters
Page 107 and 108:
Cynanchum louiseae (Syn.: Vincetoxi
Page 109 and 110:
Kelly Kearns, Wisconsin DNR Cynanch
Page 111 and 112:
Cynanchum rossicum (Syn.: Vincetoxi
Page 113 and 114:
© John M. Randall, The Nature Cons
Page 115 and 116:
Hedera helix English ivy HEHE David
Page 117 and 118:
Page 119 and 120:
Lonicera japonica Japanese honeysuc
Page 121 and 122:
Chuck Bargeron, University of Georg
Page 123 and 124:
Alliaria petiolata Garlic mustard A
Page 125 and 126:
Alliaria petiolata Garlic mustard E
Page 127 and 128:
Centaurea biebersteinii Spotted kna
Page 129 and 130:
Elizabeth Czarapata Elizabeth Czara
Page 131 and 132:
Cirsium arvense Canada thistle CIAR
Page 133 and 134:
Chris Evans, University of Georgia,
Page 135 and 136:
Cirsium vulgare Bull thistle CIVU E
Page 137 and 138:
Utah State University Archives, www
Page 139 and 140:
Euphorbia esula Leafy spurge EUES W
Page 141 and 142:
Elizabeth Czarapata Euphorbia esula
Page 143 and 144:
Hesperis matronalis Dame’s rocket
Page 145 and 146:
Kelly Kearns, Wisconsin DNR Kelly K
Page 147 and 148:
Lysimachia nummularia Creeping jenn
Page 149 and 150:
Lysimachia nummularia Creeping jenn
Page 151 and 152:
Lythrum salicaria Purple loosestrif
Page 153 and 154:
Steve Dewey, Utah State University,
Page 155 and 156:
Polygonum cuspidatum Japanese knotw
Page 157 and 158:
Elizabeth Czarapata Jil M. Swearing
Page 159 and 160:
Polygonum sachalinense Giant knotwe
Page 161 and 162:
Ben Legler, The Burke Museum of Nat
Page 163 and 164:
Polygonum x bohemicum Bohemian knot
Page 165 and 166:
Ben Legler, The Burke Museum of Nat
Page 167 and 168:
Microstegium vimineum Nepalese brow
Page 169 and 170:
Elizabeth Czarapata Elizabeth Czara
Page 171 and 172:
Phalaris arundinacea Reed canary gr
Page 173 and 174:
Elizabeth Czarapata Phalaris arundi
Page 175 and 176:
Phragmites australis Common reed PH
Page 177 and 178:
Phragmites australis Common reed Ph
Page 179 and 180:
References Flora of North America E
Page 181 and 182:
Appendix A Leaf and inflorescence m
Page 183 and 184:
Cyme A Cyme is a group of flowers i
Page 185 and 186:
Descriptive Flower Shapes Shape Nam
Page 187 and 188:
Cruciform (Cross-shaped) A flower w
Page 189 and 190:
Appendix C Key to the species Lonic
Page 191 and 192:
Appendix E Key to the species Berbe
Page 193 and 194:
Appendix G Key to the species Elaea
Page 195 and 196:
Discoid - In the Asteraceae, with a
Page 197:
Olson Cassandra; Cholewa, Anita F.
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