Vegetation of Ladd Marsh Wildlife Refuge

Grande Ronde Valley, Union County, Oregon

The Ladd Marsh Wildlife Refuge is located in the south-west corner of the Grande Ronde Valley in Union County, Oregon, at 2,800 ft. elev. It is administrated by the Oregon Department of Fish and Wildlife, and comprises a approximately 5,000 acres. Portions of the refuge harbor some of the few remaining areas of undisturbed native valley floor vegetation and constitute a critical encological enclave for biodiversity.

ACERACEAE
Acer negundo L. - Box Elder

ALISMATACEAE
Alisma plantago-aquatica L. - Waterplantain
Sagittaria cuneata Sheld - Wapato, Arrowhead

APIACEAE
Anthriscus scandicina (Weber) Mansfeld - Chervil
Cicuta douglasii (DC.) Coult. & Rose - Western Water Hemlock
Heracleum lanatum Michx. - Cow Parsnip
Lomatium grayi Coult. & Rose - Gray's Lomatium
Lomatium leptocarpum (T&G) Coult&Rose - Narrow-leaved Lomatium
Lomatium macrocarpum (Nutt.) Coult&Rose - Big-fruited Lomatium

ASCLEPIADACEAE
Asclepias fascicularis Dcne. - Narrow-leaved or Mexican Milkweed
Asclepias speciosa Torr. - Showy Milkweed

ASTERACEAE
Achillea millefollum L. - Yarrow
Anthemis cotula L. - Stinking Mayweed
Arctium minus (Hill) Bernh. - Common Burdock
Arnica sororia Greene - Twin Arnica
Artemisia biennis Willd. - Biennial Wormwood
Artemisia ludoviciana Nutt. var. ludoviciana - Prairie Sage
Aster chilensis ssp. adscendens (Lindl.) Cronq. - Long-leaved Aster
Aster frondosus (Nutt.) T. & G. - Alkali Aster
Balsamorhiza hirsuta Nutt. - Hairy Balsamroot
Balsamorhiza sagittata (Pursh) Nutt. - Arrowleaf Balsamroot
Bidens vulgata Greene - Tall Beggar's-tick
Blepharipappus scaber Hook. - Blepharipappus
Centaurea cyanus L. - Bachelor Buttons
Chrysothamnus nauseosus (Pall.) Britt. - Rabbitbrush
Cichorium intybus L. - Wild Succory, Blue Sailors
Cirsium arvense (L.) Scop. - Canada Thistle
Gnaphalium palustre Nutt. - Lowland Cudweed
Grindella nana Nutt. - Low Gumweed
Helianthus annuus L. - Common Sunflower
Lactuca serriola L. - Prickly Lettuce
Matricaria matricariodes (Less.) Porter - Pineapple weed
Senecio foetidus Howell - Sweet-marsh Butterweed
Seneco integerrimus Nutt. - Western Groundsel
Sonchus oleraceus L. - Common Sow-thistle
Taraxacum officinale Weber - Common Dandelion
Tragopogon dubius Scop. - Yellow Salsify

BETULACEAE
Alnus sinuata (Regel.) Rydb. - Sitka Alder
Betula occidentalis Hook. - Water Birch

BORAGINACEAE
Anchusa officinalis L. - Common Buglose
Asperugo procumbens L. - Catchweed
Cynoglossum officinale L. - Common Hounds-tongue
Lithospermum arvense L. - Corn Gromwell
Lithospermum ruderale Dougl. - Western Gromwell, Stoneseed
Mysotis micrantha Pall. - Blue Scorpion-grass

BRASSICACEAE
Alyssum alyssoides L. - Pale Alyssum
Brassica nigra (L.) Koch - Black mustard
Camelina microcarpa Andrz. - Little Pod Falseflax
Descurainia pinnata (Walt.) Britt. - Western Tansymustard
Descurainia richardsonii (Sweet) Schulz - Richardson's Tansymustard
Draba verna L. - Spring Draba
Euclidium syriacum (L.) R. Br. - Euclidium
Lepidium campestre (L.) R. Br. - Field Pepperweed
Lepidium perfoliatum L. - Clasping Pepperweed
Rorippa nasturtium-aquaticum (L.) Schinz & Thee - Water-cress
Sisymbrium altissimum L. - Tumbleweed
Thlaspi arvense L. - Field Pennycress

CALLITRICHACEAE
Callitriche spp. - prob. C. verna L. - Spring Water-starwort

CAMPANULACEAE
Downingia elegans (Dougl.) Torr. - Showy Downingia

CAPRIFOLIACEAE
Lonicera tatarica L. - Honeysuckle
Sambucus cerulea Raf. - Blue Elderberry
Symphoricarpos albus (L.) Blake - Common Snowberry

CARYOPHYLLACEAE
Arenaria serpyllifolia L. - Thyme-leaf Sandwort
Cerastium siculum Guss. - Dry Chickweed
Cerastium vulgatum L. - Common Chickweed
Holosteum umbellatum L. - Jagged Chickweed

CHENOPODIACEAE
Atriplex patula var. hastata (L.) Gray - Fat-hen Orache
Atriplex truncata (Torr.) Gray - Wedgescale Orache
Chenopodium album L. - Lambsquarter
Kochia scoparia (L.) Schrad. - Burning-bush, Red Belvedere
Sarcobatus vermiculatus (Hook.) Torr. - Greasewood

CONVOLVULACEAE
Convolvulus arvensis L. - Bindweed

CORNACEAE
Cornus stolonifera Michx. - Red-osier Dogwood

CUPRESSACEAE
Juniperus virginiana L. (?) - Red Cedar

CYPERACEAE
Carex aperta Boott - Columbia Sedge
Carex atherodes Spreng. - Awned Sedge
Carex interior Bailey - Inland Sedge
Carex nebrascensis Dewey - Nebraska Sedge
Carex pellita Muhl. - Woolly Sedge
Carex siccata Dewey - Dry Sedge
Carex simulata Mack. - Short-beaked Sedge
Carex stipata Muhl. - Sawbeak Sedge
Eleocharis acicularis (L.) R. & S. - Needle Spikerush
Eleocharis ovata (Roth.) R. & S. - Ovoid Spikerush
Eleocharis palustris (L.) R. & S. - Common Spikerush
Scirpus acutus Muhl. - Hardstem Bulrush
Scirpus maritimus L. - Bulrush (triangle-stemmed)
Scirpus microcarpus Presl. - Small-fruited Bulrush

DIPSACACEAE
Dipsacus sylvestris Huds. - Teasel

ELAEAGNACEAE
Elaeagnus angustifolia L. - Russian Olive

EQUISETACEAE
Equisetum arvense L. - Common Horsetail
Equisetum laevigatum A. Br. - Smooth Scouring-rush

EUPHORBIACEAE
Euphorbia lathyrus L. - Mole Plant

FABACEAE
Astragalus reventus Gray - Blue Mtn. Milkvetch
Caragana arborescens Lam. - Siberian Pea
Lathyrus pauciflorus Fern. - Few-flowered Pea
Lotus purshianus (Benth.) Clements & Clements - Spanish Clover
Lupinus leucophyllus Dougl. - Velvet Lupine
Lupinus sulphureus Dougl. var. sulphureus - Sulfur Lupine
Medicago lupulina L. - Black Medic
Medicago sativa L. - Alfalfa
Melilotus officinalis (L.) Lam. - Common Yellow Sweet-clover
Robinia pseudo-acacia L. - Black Locust
Thermopsis montana Nutt. - Golden Pea
Trifolium douglasii House - Douglas' Clover
Trifolium fragiferum L. - Strawberry Clover
Trifolium hybridum L. - Alsike Clover
Trifolium longipes Nutt. - Long-stalked Clover
Trifolium plumosum Dougl. var. plumosum - Plumed Clover
Trifolium pratense L. - Long-stalked Clover
Trifolium wormskjoldii Lehm. - Springbank Clover
Vicia americana Muhl. - American Vetch
Vicia cracca L. - Bird Vetch, Tufted Vetch
Vicia villosa Roth - Hairy Vetch

GERANIACEAE
Erodium cicutarium (L.) L'Her. - Filaree
Geranium viscosissimum - Sticky-leaf Geranium

GROSSULARIACEAE
Ribes aureum Pursh - Golden Currant

HIPPURIDACEAE
Hippuris vulgaris L. - Common Mare's Tail

HYDRANGEACEAE
Philadelphous lewisii Pursh - Mock Orange

IRIDACEAE
Iris missouriensis Nutt. - Blue Flag, Wild Iris
Sisyrinchium angustifolium Mill.- Blue-eyed Grass
Sisyrinchium inflatum (Suksd.) St. John - Grass-widows

JUNCACEAE
Juncus balticus - Baltic Rush
Juncus ensifolius Wikst. - Dagger-leaf Rush

JUNCAGINACEAE
Triglochin maritimum L. - Arrow-grass

LAMIACEAE
Lamium amplexicaule L. - Common Henbit
Marrubium vulgare L. - Horehound
Scutellaria angustifolia Pursh - Narrow-leaved Skullcap

LILIACEAE
Brodiaea douglasil Wats. - Douglas' Brodiaea
Camassia quamash (Pursh) Greene - Common Camas
Smilacina stellata (L.) Desf. - Star-flowered Solomon's Seal
Veratrum californicum Durand - Corn Lily
Zigadenus venenosus Wats. - Death Camas

LYTHRACEAE
Ammannia coccinea Rottb. - Ammannia
Lythrum hyssopifolia L. - Hyssop Loosestrife
Lythrum salicaria L. - Purple Loosestrife

MALVACEAE
Malva neglecta Wallr. - Dwarf Mallow

MARSILEACEAE
Marsilea vestita Hook. & Grev. - Clover-fern

NYMPHAEACEAE
Nymphaea odorata Ait. - Fragrant Water-lily

ONAGRACEAE
Epilobium palustre L. - Swamp Willow-herb
Epilobium watsonii Barbey - Watson's Willow-herb

PINACEAE
Pinus ponderosa Dougl. - Ponderosa Pine

PLANTAGINACEAE
Plantago major L. - Common Plantain

POACEAE
Agropyron intermedium (Host.) Beauv. - Intermediate Wheatgrass
Agropyron spicatum (Pursh) Scribn. & Smith - Bluebunch Wheatgrass
Alopecurus aequalis Sobol. - Little Meadow-foxtail
Alopecurus pratensis L. - Meadow Foxtail
Arrhenatherum elatius (L.) Presl. - Tall Oatgrass
Avena fatua L. - Wild Oat
Beckmannia syzigachne (Steud.) Fern - Soughgrass
Bromus brizaeiformis Flsch. & Mey - Rattlegrass
Bromus commutatus Schrad. - Meadow or Hairy Brome
Bromus inermis Leys. - Smooth Brome
Bromus japonicus Thunb. - Japanese Brome
Bromus tectorum L. - Cheatgrass
Dactylis glomerata L. - Orchard grass
Deschampsia caespitosa (L.) Beauv. - Tufted Hairgrass
Echinochloa crusgalli (L.) Beauv. - Large Barnyard Grass
Elymus caput-medusae L. - Medusahead
Elymus cinereus Scribn. & Merrill - Giant Wildrye
Festuca idahoensis Elmer - Idaho Fescue
Hordeum jubatum L. - Squirreltail
Panicum capillare L. - Common Witchgrass
Phalaris arundinacea L. - Reed Canarygrass
Phleum pratense L. - Common Timothy
Poa bulbosa L. - Bulbous Bluegrass
Poa palustris L. - Meadowgrass
Polypogon monspleniensis (L.) Desf. - Annual Beard-grass
Secale cereale L. - Rye
Sitanion hystrix (Nutt.) J.G. Smith - Squirreltail

POLEMONIACEAE
Micosteris gracilis (Hook.) Greene - Microsteris
Phlox caespitosa Nutt. - Tufted Phlox
Polemonium micranthum Benth - Annual Polemonium

POLYGONACEAE
Polygonum aviculare L. - Prostrate Knotweed
Polygonum bistortoides Pursh - Bistort
Polygonum persicaria L. - Heartweed, Spotted Ladysthumb
Polygonum ramosissimum Michx. - Bushy Knotweed
Rumex acetosella L. - Sour Weed
Rumex crispus L. - Curly Dock
Rumex maritimus L. - Seaside or Golden Dock

PORTULACACEAE
Montia chamissoi (Ledeb.) Robbins & Fern. - Water Montia
Montia linearis (Dougl.) Greene - Narrowed-leaved Montia
Montia perfoliata (Donn) Howell - Miner's Lettuce

PRIMULACEAE
Dodecatheon pulchellum (Raf.)Merrill - Few-flowered Shooting Star
Clematis ligusticifolia Nutt. - Western Clematis

RANUNCULACEAE
Delphinium depauperatum Nutt. – Dwarf Larkspur
Ranunculus acris L. - Meadow Buttercup
Ranunculus aliamaefolius Geyer - Water-plantain Buttercup
Ranunculus macounii Britt. Var. macounii - Macoun's Buttercup
Ranunculus testiculatus Crantz. - Hornseed Buttercup

ROSACEAE
Crataegus douglasii Lindl. - Hawthorn
Potentilla gracilis var. flabelliformis (Lehm.) Nutt. - Slender Cinquefoil
Prunus americana Marsh - Wild Plum
Prunus virginiana L. - Common Chokecherry
Rosa nutkana var. hispida Fern. - Nootka Rose
Rosa woodsii Lindl. - Wood's Rose
Sanguisorba occidentalis Nutt. - Annual Burnet

RUBIACEAE
Galium aparine L. - Bedstraw

SALICACEAE
Populus trichocarpa T. & G. - Black Cottonwood
Populus tremuloides Michx. - Quaking Aspen
Salix alba L. - Golden Willow
Salix amydaloides Anderss. - Peachleaf Willow
Salix exigua ssp. melanopsis (Nutt.) Cronq. - Coyote or Sandbar Willow
Salix lasiolepis Benth - Arroyo Willow
Salix lutea Nutt. – Yellow Willow (was S. rigida var. watsonii (Bebb.) Cronq. - Rigid Willow)
Salix scouleriana Barratt – Scouler Willow

SAXIFRAGACEAE
Lithophragma parviflora (Hook.) Nutt. - Small-flowered Woodlandstar

SCROPHULARIACEAE
Castilleja cusickii Greenm. - Cusick's Paintbrush
Collinsia parviflora Lindl. - Blue-eyed Mary
Mimulus guttatus DC. - Yellow Monkey-flower
Penstemon deustus Dougl. - Hot Rock Penstemon
Penstemon speciosus Dougl. - Showy Penstemon
Verbascum thapsus L. - Wooly Mullein
Veronica americana Schwein ex. Benth. - American Speedwell
Veronica anagallis-aquatica L. - Water Speedwell

SOLANACEAE
Solanum dulcamara L. - Climbing Nightshade

SPARGANIACEAE
Sparganium spp.

TYPHACEAE
Typha latifolia L. - Cattail

ULMACEAE
Ulmus pumila L.- Siberian Elm

VALERIANACEAE
Plectritis macrocera T. & G. - White Plectritis

Dr. Karen Antell
Associate Professor of Biology
Eastern Oregon University, La Grande, Oregon, U.S.A.
Page updated Nov. 2006