Table of Contents

Invasive Plants and Weeds of the National Forests and Grasslands in the Southwestern Region

Common Name Scientific Name Page
Grasses
Arabiangrass Schismus arabicus Nees 2
Buffelgrass Pennisetum ciliare (L.) Link 4
Cheatgrass Bromus tectorum L. 6
Crimson fountaingrass Pennisetum setaceum (Forssk.) Chiov. 8
Field sandbur Cenchrus spinifex Cav. 10
Giant reed Arundo donax L. 12
Japanese brome Bromus japonicus Thunb. 14
Johnsongrass Sorghum halepense (L.) Pers. 16
Jointed goatgrass Aegilops cylindrica Host 18
Lehmann lovegrass Eragrostis lehmanniana Nees 20
Mediterranean grass Schismus barbatus (loefl. ex L.) Thell. 22
Quackgrass Elymus repens (L.) Gould 24
Ravennagrass Saccharum ravennae (L.) L. 26
Red brome Bromus rubens L. 28
Rescuegrass Bromus catharticus Vahl 30
Ripgut brome Bromus diandrus Roth 32
Southern sandbur Cenchrus echinatus L. 34
Tall fescue Schedonorus phoenix (Scop.) Holub 36
Uruguayan pampas grass Cortaderia selloana (Schult. & Schult. f.) Asch. & Graebn. 38
Weeping lovegrass Eragrostis curvula (Schrad.) Nees 40
Wild oat Avena fatua L. 42
Shrubs and Trees
African sheepbush Pentzia incana (Thunb.) Kuntze 46
African sumac Rhus lancea L. f. 48
Camelthorn Alhagi maurorum Medik. 50
Himalayan blackberry Rubus armeniacus Focke 52
Lilac chastetree Vitex agnus-castus L. 54
Russian olive Elaeagnus angustifolia L. 56
Saltcedar Tamarix spp. 58
Siberian elm Ulmus pumila L. 60
Sweet resinbush Euryops multifidus (Thunb.) DC 62
Tree of heaven Ailanthus altissima (Mill.) Swingle 64
Green or Inconspicuous Flowered Forbs
Common cocklebur Xanthium strumarium L. 68
Eurasian watermilfoil Myriophyllum spicatum L. 70
Halogeton Halogeton glomeratus (M. Bieb.) C. A. Mey 72
Kochia Bassia spp. All 74
Parrot feather milfoil Myriophyllum aquaticum (Vell.) Verdc. 76
Russian thistle Salsola spp. 78
Spiny cocklebur Xanthium spinosum L. 80
Pink, Rose, Red, or Purple Flowered Forbs
Alfalfa Medicago sativa L. 84
Black henbane Hyoscyamus niger L. 86
Blue mustard Chorispora tenella (Pall.) DC. 88
Bull thistle Cirsium vulgare (Savi) Ten. 90
Canada thistle Cirsium arvense (L.) Scop. 92
Common burdock Arctium minus Bernh. 94
Diffuse knapweed Centaurea diffusa Lam. 96
Hounds-tongue Cynoglossum officinale L. 98
Iberian knapweed Centaurea iberica Trevir. ex Spreng. 100
Meadow knapweed Centaurea debeauxii Gren. & Godr. [excluded] 102
Musk thistle Carduus nutans L. 104
Purple loosestrife Lythrum salicaria L. 106
Purple starthistle Centaurea calcitrapa L. 108
Red clover Trifolium pratense L. 110
Redstem filaree Erodium cicutarium (L.) L’Hér. ex Aiton 112
Russian knapweed Acroptilon repens (L.) DC. 114
Scotch thistle Onopordum acanthium L. 116
Spiny plumeless thistle Carduus acanthoides L. 118
Spotted knapweed Centaurea stoebe L. 120
Squarrose knapweed Centaurea virgata Lam. 122
Tall morning-glory Ipomoea purpurea (L.) Roth 124
Teasel Dipsacus fullonum L. 126
Blue or Violet Flowered Forbs
Bigleaf periwinkle Vinca major L. 130
Carolina horsenettle Solanum carolinense L. 132
Chicory Cichorium intybus L. 134
White Flowered Forbs
African rue Peganum harmala L. 138
Broadleaved pepperweed Lepidium latifolium L. 140
Field bindweed Convolvulus arvensis L. 142
Hairy whitetop Cardaria pubescens (C.A. Mey.) Jarmolenko 144
Horehound Marrubium vulgare L. 146
Lens-podded hoarycress Cardaria chalepensis (L.) Hand.- Maz. 148
Onionweed Asphodelus fistulosus L. 150
Oxeye daisy Leucanthemum vulgare Lam. 152
Poison hemlock Conium maculatum L. 154
White clover Trifolium repens L. 156
White sweetclover Melilotus albus (L.) Lam. 158
Whitetop Cardaria draba (L.) Desv. 160
Yellow Flowered Forbs
Black medick Medicago lupulina L. 164
Black mustard Brassica nigra (L.) W.D.J. Koch 166
Burclover Medicago polymorpha L. 168
Curveseed butterwort Ceratocephala testiculata (Crantz) Roth 170
Dalmatian toadflax Linaria dalmatica (L.) Mill 172
Dyer’s woad Isatis tinctoria L. 174
Floating primrose- willow Ludwigia peploides (Kunth) P.H. Raven spp. montevidensis (Spreng.) P.H. Raven 176
Globe chamomile Oncosiphyon piluliferum (L. f.) Källersjö 178
Leafy spurge Euphorbia esula L. 180
Little hogweed Portulaca oleracea L. 182
Maltese starthistle Centaurea melitensis L. 184
Mediterranean sage Salvia aethiopis L. 186
Perennial sowthistle Sonchus arvensis L. 188
Perennial wallrocket Diplotaxis tenuifolia (L.) DC. 190
Puncturevine Tribulus terrestris L. 192
Rush skeletonweed Chondrilla juncea L. 194
Saharan mustard Brassica tournefortii Gouan 196
Sicilian starthistle Centaurea sulphurea Willd. 198
Spiny sowthistle Sonchus asper (L.) Hill 200
Tansy ragwort Senecio jacobaea L. 202
Texas blueweed Helianthus ciliaris DC. 204
Wild mustard Sinapis arvensis L. 206
Wooly mullein Verbascum thapsus L. 208
Yellow salsify Tragopogon dubius Scop. 210
Yellow starthistle Centaurea solstitialis L. 212
Yellow sweetclover Melilotus officinalis (L.) Lam. 214
Yellow toadflax Linaria vulgaris Miller 216