Determinations were made in the field of all vascular 

 plant species encountered in flower, fruit or in an otherwise 

 identifiable stage. For taxonomic groups (e.g. Poa, 

 Cryptantha) which could not be reliably identified to species, 

 determinations were left at the level of genus. Other species 

 were undoubtedly entirely overlooked due to their immaturity. 

 A few specimens were collected. These have been identified 

 and will be deposited at the herbarium at Montana State 

 University (MONT) . Duplicates of Delphinium specimens were 

 sent to Michael Warnock (Sam Houston State University, 

 Huntsville, Texas), a specialist in the genus. The primary 

 floras used to key out plants were Dorn (1984), and Hitchcock 

 and Cronguist (1973). In general, scientific names used in 

 this report follow Dorn. 



Field notes included lists of all vascular plant taxa 

 encountered and characterizations of the habitat and dominant 

 vegetation (summarized in the preceding section) . A field 

 survey form, including habitat and population data, was filled 

 out for the Delphinium population that was found, and the 

 population was mapped. 



RESULTS 



A total of 121 vascular plant taxa were identified 

 within the study area including a Delphinium species of 

 concern. A list of these taxa is included as Appendix 3 of 

 this report. Several populations of the Delphinium were also 

 found outside the project boundaries nearby, and along the 

 Jefferson River. Neither Townsendia spathulata, nor the 

 undescribed Lesguereila were seen, despite extensive searching 

 of limestone habitats. 



The Delphinium was found just above Cottonwood Canyon 

 across the creek from the Interstate (see EOR printout in 

 Appendix 4 and map in Appendix 5) . This taxon has been 

 identified in the past as D. andersonii or D. geyeri, both of 

 which are potential BLM sensitive species. However Warnock 

 (pers. commun.) has reviewed specimens to determine that 

 neither species occurs in Montana, and that all specimens 

 represent a subspecies of D. bicolor . Plants differ from 

 those of D. bicolor by having solid blue tipped or entirely 

 white upper petals as opposed to blue veined upper petals (see 

 slides in Appendix 6) . Both Delphinium bicolor ssp. bicolor 

 and D. b. ssp. novum were found in the study area. The 

 undescribed subspecies occurred in more restricted habitat and 

 was at an earlier flowering stage. More information on this 

 taxon is found in Vanderhorst and Lesica (1994) . 



At the Cottonwood Canyon site the undescribed Delphinium 

 grows in relatively well developed, fine textured soils on 



