calyx lobes, short blades of the petals, 4 shorter 

 appendages, and large inflated seeds are almost 

 peculiar to the species. All in all it is one of 

 our most distinct plants ... ." This taxonomically 

 distinct species is associated with the few remnants 

 of Palouse prairie left intact in the states of 

 Montana, Idaho, Oregon, and Washington. 



B. Human: According to Hitchcock et al. (1964), this 

 family contains several genera of ornamental value, 

 including Dianthus (carnation), Gypsophila (baby's 

 breath) , Arenaria (sandwort) , Silene (catchfly) , and 

 L ychnis (campion) . This species may have 

 horticultural potential; however, currently it has 

 no known agricultural, economic or other human uses 

 or significance. 



5. Geographical distribution. 



A. Geographical range: Silene spaldinqii is currently 

 known in Montana from sites in the Tobacco Valley, 

 Lincoln County; Wild Horse Island, Lake County; and 

 the area around Niarada in Sanders and Flathead 

 counties. A distribution map of Silene spaldinqii 

 populations in Montana is found on p. 10. In Idaho 

 it is known from sites in Lewiston County; and in 

 Washington from sites in Whitman, Spokane, and 

 Asotin counties. In 1988, a single plant was 

 observed in British Columbia, Canada. 



Silene spaldinqii is historically known from two 

 locations in Oregon in Umatilla and Wallowa 

 counties. 



B. Precise occurrences. 



1. Populations currently known to be extant. 



a. Montana: Populations are listed in Table 

 1, pp. 11-18. Exact locations are 

 provided on USGS quadrangle maps, pp. 19- 

 25. 



Dancing Prairie-Tobacco Plains South (001) 



Wild Horse Island State Park (002) 



Black Bear Ranch (003) 



Mill Pocket Ridge (004) 



Crosson Valley (005) 



Tobacco Plains North (008) 



Cromwell Creek (009) 



Hog Heaven Range (010) 



