(licorice) , Melilotus spp. (sweetclovers) , Sonchus uliginosus 

 (sowthistle) , and Trifolium pratense (red clover) . Additional 

 floodplain habitat includes gravel bars characterized by 

 Ranunculus gmelinii (buttercup) and the exotic Myosotis 

 scirpoides (forget-me-not) and mudflats dominated by Carex 

 urtriculata (sedge) and species of Juncus (rushes) and Scirpus 

 (bullrushes) . Weeds are a problem in the open camping, picnic 

 and parking areas adjacent to the highway and railroad tracks 

 where heavy infestations of Berteroa incana (berteroa) , Bromus 

 tectorum (downy brome) , and Centaurea maculosa (spotted 

 knapweed) are found along with lesser weeds such as Lactuca 

 serriola (prickly lettuce) , Tragopogon dubius (salsify) , and 

 Verbascum thapsus (mullein) . It is recommended that broad 

 treatment of weeds be confined to these developed areas 

 (Figure 5) . 



White Bird Fishing Access Site 



Vegetation at this site along the Stillwater River 

 consists of relatively pristine floodplain woodlands and 

 wetlands and meadows in small openings managed for camping and 

 picnicking. The woods are dominated by Acer negundo (box 

 elder) and Populus balsamifera (cottonwood) , with an 

 understory of shrubs including Cornus stolonifera (dogwood) , 

 Eleagnus commutatus (silverberry) , Juniperus scopulorum (Rocky 

 Mountain juniper) , and Symphoricarpos sp. (snowberry) , Swampy 

 areas are dominated by Phalaris arundinacea (canary reedgrass) 

 and Salix exigua (willow) . The meadows are dominated by 

 introduced pasture species including Bromus inermis (smooth 

 brome) , Dactylis glomerata (orchardgrass) , Medicago spp. 

 (alfalfas) , Melilotus spp. (sweetclovers) , Phleum pratense 

 (timothy) , and Trifolium pratense (red clover) . Weeds include 

 Berteroa incana (berteroa) , Centaurea maculosa (spotted 

 knapweed) , Cirsium arvense (Canada thistle) , Euphorbia esula 

 (leafy spurge), Glycyrrhiza lepidota (licorice), and Verbascum 

 thapsus (mullein) . No MPS8C were found or are expected at 

 this site. 



Yellowstone River Trout Hatchery 



This site in Big Timber is almost entirely a managed 

 landscape. Most of the area is mowed turf, however, there is 

 a small plantation of Picea (spruce) , and a small swampy area 

 with aquatic plants such as Epilobium ciliatum (willow-herb) , 

 Lemna minor (duckweed) , and Typha latifolia (cattail) . Weeds 

 at the site include Arctium minus (burdock) , Cirsium arvense 

 (Canada thistle), Malva neglecta (mallow) and Solanum dulcamara 

 (nightshade) . The potential for MPSSC is low. Precautions 

 should be taken so that the wetlands are not polluted with 

 toxic herbicides. 



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