IS 



41 



miiadow near Lolo Hot Springs. Intermediates, which would suggest 

 hybridization, were not found in this zone of sympatry. This 

 suggests that hybridization does not occur between T. wolfii and T. 

 canescens or that gene exchange betweeh the two is a rcire event. 

 Until artificial synthesis of the F hybrid cam be performed and the 

 F plants compared with the type of T. orthochaetum , the origin and 

 tcixonomic status of the latter cannot be resolved. Thus for the present, 

 it seems advisable to retain T^. orthochaetuin on the endangered species 

 list so as to protect any plants that may be later discovered. 



I have the putative parents in cultivation and will attempt cross- 

 pollinations as soon as the plajits can be induced to flower. Production 

 of an F hybrid will take at least two years because of the slow growth- 

 rate of these perennials. 



