37 



saqittatum is found in bottomlands with open exposure. 

 It is found in moist, alkaline soils. 



F. POPULATION DEMOGRAPHY AND BIOLOGY 



1. POPULATION SIZE AND CONDITION: Thelvpodium saqittatum 

 ssp saqittatum p opulation for the spring/summer of 1993 

 was abundant. It was the dominant species all along 

 the lake and river bottomlands. 



G. REPRODUCTIVE BIOLOGY: Thelypodium saqittatum ssp 

 saqittatum is a biennial that reproduces by seed. 



H. LAND OWNERSHIP: Thelvpodium saqittatum ssp saqittatum was 

 located on lands belonging to BLM, National Wildlife 

 Refuge, and private. 



ASSESSMENT AND MANAGEMENT RECOMMENDATIONS 



A. THREATS TO KNOWN POPULATIONS: Populations of Thelypodium 

 saqittatum ssp saqittatum appear to stable at this time. 

 The only likely threat would be if grazing was to increase 

 in the area where disturbance might produce detrimental 

 effects. 



B. FURTHER ASSESSMENT AND MANAGEMENT NEEDS: No altered 

 management practices seem to be called for at this time. 

 Should further surveys reveal a population decline because 

 of disturbance, then monitoring of populations would be 

 called for to assess whether or not livestock use posed a 

 threat. 



C. SUMMARY: Thelypodium saqittatum ssp saqittatum is 

 recommended for addition to the proposed BLM list of 

 sensitive species. 



