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This report contains information on a rare plant inventory 

 conducted in portions of the Bull River valley. Field surveys 

 were completed on 19-23 June and 24-28 July 1989. During survey 

 work four species of special concern were located: Lomatium 

 bicolor var. bicolor (1 population), Madia minima (3 

 populations) , Heterocodon rariflorum (2 populations) , and Spiraea 

 X pyramidata (1 population) . These species are not currently 

 included on the U.S. Forest Service Region 1 (Northern Region) 

 list of sensitive species; however, they are included on the 

 Montana Natural Heritage Program list of plant species of special 

 concern. A report for each species, including detailed 

 information on the populations found in the Bull River valley, is 

 included. Voucher specimens of Madia minima, Heterocodon 

 rariflorum , Lomatium bicolor var. bicolor . and Spiraea x 

 pyramidata were deposited at the University of Montana Herbarium 

 (MONTU) , Missoula, MT. Additional specimens of Lomatium bicolor 

 var. bicolor are deposited at the University of California 

 Herbarium (UC) , Berkeley, CA. 



A list of 252 vascular plant species observed during this 

 study is included at the end of the report. 



A day and a half was spent surveying Forest Service lands on 

 Rock Creek, Marten Creek, and the mouth of the Vermillion River 

 for Satureia douglasii. This species is known to occur on 

 private lands near Rock Creek, but is not yet known from U.S. 

 Forest lands in the area. We were unable to locate this species 

 on the private land where it was first observed, or on U.S. 

 Forest Service lands. Many plants were late in flowering in 1989 

 due to the very cold winter and late, cold spring. Satureja 

 douglasii may not have been blooming, in which case this 

 unobtrusive plant could have been easily overlooked. 



