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

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Cynanchum louiseae (Syn.: Vincetoxicum nigrum) Black swallow-wort CYLO11 Louise’s swallow-wort Form: Scrambling or climbing vine up to 6½ ft (2 m) long. Stems mostly very slender. Leaves: Opposite, narrowly to broadly ovate; apex longtapering or acute. Flowers/fruit: Few-flowered clusters axillary to the leaves; flowers small, 5-petaled, star-shaped; corolla purple to purplish-black. Milkweed-like fruits 1½-3 in. (4-7 cm) long and slender, with pubescent seeds. Habitat: Moist, sunny places including woods. Other distinguishing features/notes: Also known as Vincetoxicum nigrum. Similar species: European or pale swallow-wort (Cynanchum rossicum) has creamy pink to reddish brown flowers. Its twining habit and opposite, smooth leaves with somewhat shiny or reflective quality distinguish Cynanchum louiseae from other native and introduced species in the northeastern quarter of the U.S. and adjacent Canada. Notes
Kelly Kearns, Wisconsin DNR Cynanchum louiseae (Syn.: Vincetoxicum nigrum) Black swallow-wort Louise’s swallow-wort Kelly Kearns, Wisconsin DNR Elizabeth Czarapata
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United States Department of Agricul
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A Guide to Nonnative Invasive Plant
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Tree Species Contents Acer platanoi
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Acer platanoides Norway maple ACPL
Page 9 and 10:
Paul Wray, Iowa State University, w
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Ailanthus altissima Tree-of-heaven
Page 13 and 14:
Barbara Tokarska-Guzik, University
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Albizia julibrissin Silktree ALJU J
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James H. Miller, U.S. Forest Servic
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Elaeagnus angustifolia Russian oliv
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Melaleuca quinquenervia Punktree ME
Page 25 and 26:
Amy Ferritar, South Florida Water M
Page 27 and 28:
Melia azedarach Chinaberry MEAZ Jam
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Page 31 and 32:
Paulownia tomentosa Princesstree PA
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James Allison, Georgia Department o
Page 35 and 36:
Robinia pseudoacacia Black locust R
Page 37 and 38:
Elizabeth Czarapata Robinia pseudoa
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 77 and 78: James H. Miller, U.S. Forest Servic
Page 79 and 80: Lonicera morrowii Morrow’s honeys
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 95 and 96: Spiraea japonica Japanese meadowswe
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: Cynanchum louiseae (Syn.: Vincetoxi
Page 111 and 112: Cynanchum rossicum (Syn.: Vincetoxi
Page 115 and 116: Hedera helix English ivy HEHE David
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
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Elizabeth Czarapata Phalaris arundi
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Phragmites australis Common reed PH
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Phragmites australis Common reed Ph
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References Flora of North America E
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Appendix A Leaf and inflorescence m
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Cyme A Cyme is a group of flowers i
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Descriptive Flower Shapes Shape Nam
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Cruciform (Cross-shaped) A flower w
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Appendix C Key to the species Lonic
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Appendix E Key to the species Berbe
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Appendix G Key to the species Elaea
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Discoid - In the Asteraceae, with a
Page 197:
Olson Cassandra; Cholewa, Anita F.
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