V. LITBRATURB CITBD 



Achuff, P. L. 1992. Deaographic Bonitoring of Penstemon 

 leahiensis in the Dillon Resource Area, Montana; 1991 Progress 

 Report. Montana Natural Heritage Prograa, Helena, MT. 



Achuff, P.L. and J.S. Shelly. 1991. Deaographic monitoring of 

 Penstemon leahiensis . Beaverhead National Forest; 1990 progress 

 report. Montana Natural Heritage Prograa, Helena. 34 pp. 



Lesica, P. 1987. A technique for aonitoring nonrhizoaatous, 

 perennial plant species in peraanent belt transects. Natural 

 Areas Journal 7(2):65-68. 



Massey, J.R. and P.D. Whitson. 1980. Species biology, the key to 

 plant preservation. Rhodora 82: 97-103. 



Raastetter, J. 1983. An ecolgoical study of the regional 

 endemic Penstaaon leahiensis (Keck) Keck 4 Cronq. 

 (Scrophulariaceae) . M.A. Thesis. University of Montana, 

 Missoula, MT. 116 pp. 



Schassberger, L. 1990. Report on the conservation status of 

 Penstemon leahiensis . a candidate threatened species, Montana. 

 Montana Natural Heritage Prograa, Helena, MT. 



Shelly, J. S. 1987. Status review of Pensteaon leahiensis . 

 Beaverhead and Bitterroot National Forests, Montana. Montana 

 Natural Heritage Prograa, Helena, MT. 



Shelly, J.S. 1990. Status review and establishaent of deaographic 

 monitoring studies: Pensteaon leahiensis . Montana Natural 

 Heritage Program report to Beaverhead and Bitterroot national 

 forests, Montana. 61 pp. 



Shelly, J.S. 1993. Demographic monitoring of Pensteaon 

 lemhiensis on Beaverhead National Forest; 1992 Progress Report. 

 In progress. 



U.S. Department of Agriculture - Forest Service. 1988. 

 Sensitive Plant Field Guide for Montana. 



U.S. Department of the Interior - Fish and Wildlife Service. 

 1990. Endangered and threatened wildlife and plants; review of 

 taxa for listing as endangered and threatened species; notice of 

 review. Federal Register 50 CFR Part 17: 6184-6229. 



U.S. Department of Interior - Bureau of Land Management. 1993. 

 Draft Special Status Plant Policy and List. Billings, MT. 



