1990), North Dakota (North Dakota Wildlife Society 1986), Oregon (Oregon 

 Natural Heritage Data Base 1987), Saskatchewan (Maher et al. 1979), South 

 Dakota (Houtcooper et al. 1985), Washington (Washington Natural Heritage 

 Program 1987), and Wyoming (Clark and Dorn 1981). 



INFORMATION CATEGORIES 



GLOBAL DISTRIBUTION 



The rangewide distribution of each listed taxon is given, followed by a 

 descriptor classifying the taxon 's distribution in Montana (Lesica et al. 

 1984) : 



Regional Endemic. Occurring only in a restricted geographic area equal to or 

 less than approximately one-third the size of Montana. There are two basic 

 types of endemism: (1) neoenderaism, in which a species is relatively young 

 evolutionarily, and may be expanding its range, and (2) paleoendemism, in 

 which the range of a species was once greater but is now restricted (Stace 

 1980). Regional endemics restricted to Montana are classified as "endemic to 

 Montana" in the COMMENTS section for each one (12 total); these include: 



Arabis fecunda 



Cardamine rupicola 



Cirsium lonqistylum 



Eriqeron lackschewitzii 



Erioqonum capistratum var. muhlickii 



Lesquerella humilis 



Lesquerella klausii 



Oxytropis laqopus var. conjuqens 



Phlox kelseyi var. missoulensis 



Saxif raqa tempest iva 



Synthyris canbyi 



Trisetum orthochaetum 



Disjunct. The population( s ) in Montana are widely separated from the main 

 contiguous range of the species. Disjunctions may arise by long distance 

 dispersal, or they may represent the relics of former contiguous distributions 

 (Stace 1980). Incomplete knowledge of regional floristics may result in 

 apparent disjunctions. 



Peripheral. At the geographic limits of its contiguous range. At the edge of 

 its range, a species may exhibit limitations in habitat preference. 



Sparse. Widespread range in Montana but relatively few individuals per 

 population, or few populations, or both. Species adapted to specialized 

 habitats often demonstrate this distribution pattern. 



LAND OWNERSHIP 



Many populations of sensitive species occur on public lands in Montana. 

 When information is available, we have listed the names of the agencies 

 responsible for managing lands on which particular sensitive species occur. 

 These include districts of the Bureau of Land Management (BLM), National 

 Forests of the U. S. Forest Service (USFS), various national parks (NP) and 

 national recreation areas (NRA) , national wildlife refuges (NWR) , state 

 forests, state parks and Indian reservations; where known or suspected, 

 occurrence on private lands is also indicated. 



