B2H Final EIS and Proposed LUP Amendments Appendix D—Supporting Data for Vegetation Resources Appendix D SUPPORTING DATA FOR VEGETATION RESOURCES D . 1 N O X I O U S W EEDS Noxious weeds are a subset of aggressive, non-native invasive plants that have been officially designated as detrimental to public health, agriculture, recreation, wildlife, or property. Noxious weeds include all species listed on state and county noxious weed lists. Table D-1 identifies the noxious weeds potentially occurring in the vegetation resources study corridor (0.5 mile on either side of the centerline for all alternative routes). Table D-1. State- and County-Designated Noxious Weeds with Potential to Occur Oregon Scientific Name Common Name Idaho State List State List County List Peganum harmala African rue N/A A, T N/A Armenian Rubus armeniacus N/A B N/A blackberry Hedera hibernica Atlantic Ivy N/A B N/A Austrian peaweed Sphaerophysa salsula N/A B A (Malheur), B (Umatilla) or swainsonpea Acaena novae-zelandiae Biddy-biddy N/A B N/A Big-headed Centaurea macrocephala N/A N/A A (Malheur) knapweed Control (confirmed in Hyoscyamus niger Black henbane N/A A (Baker) Owyhee County) Bohemian Control (not known in Polygonum x bohemicum N/A A (Union) knotweed Owyhee County) EDRR (not known in Egeria densa Brazilian Elodea B, T N/A Owyhee County) Brownray Centaurea jacea N/A N/A A (Umatilla) knapweed Control (confirmed in A (Baker, Malheur, Solanum rostratum Buffalobur B Owyhee County) Union) Cirsium vulgare Bull thistle N/A B B (Baker), C (Malheur) Ceratocephala testiculata Bur buttercup N/A N/A C (Baker) (Ranunculus testiculatus) Buddleja davidii Butterfly bush N/A B N/A Alhagi maurorum (A. pseudalhagi) Camelthorn N/A A A (Malheur, Umatilla) Containment B (Malheur, Morrow, Cirsium arvense Canada thistle (confirmed in B Umatilla, Union) Owyhee County) Delairea odorata Cape-ivy N/A A, T N/A Catchweed Galium aparine N/A N/A B (Union) bedstraw D-1 B2H Final EIS and Proposed LUP Amendments Appendix D—Supporting Data for Vegetation Resources Table D-1. State- and County-Designated Noxious Weeds with Potential to Occur Oregon Scientific Name Common Name Idaho State List State List County List B (Umatilla, Morrow), Secale cereale Cereal rye N/A N/A C (Union) Bromus tectorum Cheatgrass N/A N/A C (Malheur) Cichorium intybus Chickory N/A N/A B (Baker) Tussilago farfara Coltsfoot N/A A N/A Anchusa officinalis Common bugloss N/A B, T A (Union) Control (not known in Crupina vulgaris var. vulgaris Common crupina B A (Malheur, Morrow) Owyhee County) EDRR (not known in Hyrocharis morsus-ranae Common frogbit A N/A Owyhee County) Verbascum thapsus Common mullein N/A N/A B (Baker) Phragmites australis (Phragmites Control (confirmed in Common reed B N/A australis ssp. australis) Owyhee County) Tanacetum vulgare Common tansy N/A N/A B (Baker) Common Spartina anglica N/A A, T N/A cordgrass Creeping yellow Rorippa sylvestris N/A B A (Umatilla) cress Containment Curlyleaf Potamogeton crispus (confirmed in N/A N/A pondweed Owyhee County) Dipsacus laciniatus Cutleaf teasel N/A B N/A Containment Dalmation A (Baker, Morrow, Linaria dalmatica (confirmed in B, T toadflax Union), B (Umatilla) Owyhee County) Dense-flowered Spartina densiflora N/A A, T N/A cordgrass Containment A (Baker, Malheur), B Centaurea diffusa Diffuse knapweed (confirmed in B (Morrow, Union [2], Owyhee County) Umatilla), C (Union [2]) Cuscuta pentagona var. Dodder or field B (Baker, Morrow, N/A B pentagona (Cuscuta campestris) dodder Umatilla), C (Malheur) Control (confirmed in Isatis tinctoria Dyers woad B A (Malheur, Union) Owyhee County) Hedera helix English ivy N/A B N/A Eurasian Control (confirmed in Myriophyllum spicatum B N/A watermilfoil Owyhee County) Brachypodium sylvaticum False brome N/A B N/A EDRR (not known in Cabomba caroliniana Fanwort N/A N/A Owyhee County) Feathered EDRR (not known in Azolla pinnata N/A N/A mosquito fern Owyhee County) D-2 B2H Final EIS and Proposed LUP Amendments Appendix D—Supporting Data for Vegetation Resources Table D-1. State- and County-Designated Noxious Weeds with Potential to Occur Oregon Scientific Name Common Name Idaho State List State List County List Featherheaded Centaurea trichocephala N/A N/A A (Malheur) knapweed Containment B (Morrow), C (Baker, Convolvulus arvensis Field bindweed (confirmed in B, T Malheur) Owyhee County) Floating primrose Ludwigia hexapetala N/A B, T N/A willow Containment (not Butomus umbellatus Flowering rush known in Owyhee A, T N/A County) Genista monspessulana French broom N/A B N/A Garden yellow Lysimachia vulgaris N/A A N/A loosestrife Alliaria petiolata Garlic mustard N/A B N/A Heracleum mantegazzianum Giant hogweed N/A A, T N/A Polygonum sachalinense Control (not known in Giant knotweed B A (Union) (Fallopia sachalinensis) Owyhee County) EDRR (not known in Salvinia molesta Giant salvinia N/A N/A Owyhee County) Aegilops triuncialis Goatgrass Barbed N/A A, T N/A Galega officinalis Goatsrue N/A A, T N/A Ulex europaeus Gorse* N/A B, T N/A Hairy whitetop or Lepidium strictum (Lepidium upright N/A B N/A pubescens) pepperweed Halogeton glomeratus Halogeton N/A B C (Malheur) Herb Robert Geranium robertianum N/A B N/A Geranium Himalayan Polygonum polystachyum N/A B A (Union) knotweed Containment (not Berteroa incana Hoary Alyssum known in Owyhee A, T N/A County) Containment A (Baker [4], Union, Hoary cress Cardaria draba (Lepidium draba) (confirmed in B Morrow), B (Malheur, (whitetop) Owyhee County) Umatilla, Union [5]) Horse weed or Conyza sp. N/A N/A B (Union) mares tail Containment (not Cynoglossum officinale Houndstongue known in Owyhee B A (Morrow), B (Malheur) County) EDRR (confirmed in Hydrilla verticillata Hydrilla A A (Malheur) Owyhee County) EDRR (not known in Centaurea iberica Iberian starthistle A, T A (Malheur) Owyhee County) D-3 B2H Final EIS and Proposed LUP Amendments Appendix D—Supporting Data for Vegetation Resources Table D-1. State- and County-Designated Noxious Weeds with Potential to Occur Oregon Scientific Name Common Name Idaho State List State List County List Amorpha fruticosa Indigo bush N/A B N/A Carduus pycnocephalus Italian thistle N/A B A (Malheur) Cuscuta japonica Japanese dodder N/A A N/A Polygonum cuspidatum (Fallopia Japanese Control (confirmed in B A (Baker) japonica) knotweed Owyhee County) Datura stramonium Jimsonweed N/A N/A A (Malheur) Control (not known in A (Malheur), B (Morrow, Sorghum halepense Johnsongrass B Owyhee County) Umatilla) Containment (not A (Baker, Malheur), B Aegilops cylindrica Jointed goatgrass known in Owyhee B (Morrow, Umatilla, County) Union) Cortaderia jubata Jubata grass N/A B N/A Klamathweed or B (Baker, Malheur, Hypericum perforatum N/A B St. Johnswort Morrow, Umatilla) B (Morrow, Umatilla, Kochia scoparia Kochia N/A B Union), C (Baker, Malheur) Pueraria lobata Kudzu N/A A, T N/A Large-flowered Ludwigia grandiflora N/A B, T N/A primrose willow Containment A (Baker, Malheur, Euphorbia esula Leafy spurge (confirmed in B, T Morrow, Umatilla, Union) Owyhee County) Cardaria chalepensis (Lepidium Lens-podded N/A B N/A chalepensis) whitetop Ranunculus ficaria Lesser celandine N/A B N/A Cannabis sativa Marijuana N/A N/A A (Umatilla) Control (not known in Nardus stricta Matgrass A, T N/A Owyhee County) Meadow Hieracium pratense N/A B, T N/A hawkweed Meadow Centaurea nigrescens (Centaurea knapweed or Control (not known in B A (Malheur, Union) pratensis or C. debeauxii) short-fringe Owyhee County) knapweed Mediterranean Control (not known in Salvia aethiopis B A (Malheur, Morrow) sage Owyhee County) Taeniatherum caput-medusae B (Morrow), C (Baker, Medusahead N/A B (Elymus caput-meduseae) Malheur) Containment (not Milium vernale Milium known in Owyhee N/A N/A County) Silybum marianum Milk thistle N/A B A (Malheur) D-4 B2H Final EIS and Proposed LUP Amendments Appendix D—Supporting Data for Vegetation Resources Table D-1. State- and County-Designated Noxious Weeds with Potential to Occur Oregon Scientific Name Common Name Idaho State List State List County List Calystegia sepium (Convolvulus sepium and C. sepium var. Morning glory N/A N/A A (Umatilla), B (Union) repens) Verbascum blattaria Moth mullein N/A N/A B (Baker) Mouse-ear Hieracium pilosella N/A A, T N/A hawkweed Control (confirmed in A (Union, Morrow), B Carduus nutans Musk thistle B Owyhee County) (Malheur, Umatilla) Euphorbia myrsinites Myrtle spurge N/A B B (Baker) Euphorbia oblongata Oblong spurge N/A A, T N/A Clematis vitalba Old man’s beard N/A B N/A Orange Control (not known in Hieracium aurantiacum A, T N/A hawkweed Owyhee County) Aegilops ovata Ovate goatgrass N/A A N/A Containment (not Chrysanthemum leucanthemum Oxeye daisy known in Owyhee N/A N/A County) Parrotfeather Control (not known in Myriophyllum aquaticum B N/A milfoil Owyhee County) Echium plantagineum Paterson’s curse N/A A, T N/A Lathyrus latifolius Perennial peavine N/A B N/A Containment A (Baker, Malheur Perennial Lepidium latifolium (confirmed in B, T [6],Union), B (Malheur pepperweed Owyhee County) [6], Umatilla) Perennial Control (confirmed in Sonchus arvensis N/A B (Morrow) sowthistle Owyhee County) Adonis aestivalis Pheasant’s eye N/A B N/A Containment (not Carduus acanthoides Plumeless thistle known in Owyhee A, T N/A County) Containment B (Morrow), C (Baker, Conium maculatum Poison hemlock (confirmed in B Malheur, Union) Owyhee County) Policeman's EDRR (not known in Impatiens glandulifera B N/A helmet Owyhee County) Cytisus striatus Portuguese broom N/A B, T N/A Containment B (Baker, Malheur, Tribulus terrestris Puncturevine (confirmed in B Morrow, Umatilla, Union) Owyhee County) Containment A (Baker, Umatilla, Lyrum salicaria Purple loosestrife (confirmed in B Union), Morrow), B Owyhee County) (Malheur) Cyperus rotundus Purple nutsedge N/A A N/A EDRR (not known in Centaurea calcitrapa Purple starthistle A, T A (Malheur, Umatilla) Owyhee County) D-5 B2H Final EIS and Proposed LUP Amendments Appendix D—Supporting Data for Vegetation Resources Table D-1.