stems and the lack of a true corolla. It often occurs 

 with, but is easily distinguished from, Hypopitys 

 monotropa which usually has a four-merous perianth, 

 anthers that open by a continuous full-length slit 

 across the top, and stems that are white, yellowish or 

 pinkish. Pterospora andromedea also occurs with A. 

 yirgata, but differs by being usually taller (ca. 11.5- 

 39 inches (30-100 cm)), with five sepals and an urn- 

 shaped (connate) five-lobed corolla that is pendulous, 

 with bracts along the stem that are much reduced, and 

 with anthers that are awned on the back. 



D. GEOGRAPHICAL DISTRIBUTION 



1. RANGE: Allotropa virqata is known from southwestern 

 British Columbia and south through the Cascades, on 

 both the east and west sides, into the Sierra Nevada 

 and Coast Ranges of California (Hitchcock et al. 1959) . 

 It is disjunct in east-central Idaho (Idaho County) and 

 western Montana (Ravalli, Granite and Beaverhead 

 counties) where it is one of several species that have 

 coastal affinities and a similar disjunct pattern 

 (Lorain 1988) . 



2. CURRENT SITES: In Montana, it is currently known from 

 27 populations in Ravalli, Granite and Beaverhead 

 counties. Prior to the 1991 field season, A. virgata 

 was known from 16 locations, only three of which 

 contained more than a few plants. In 1991, surveys 

 conducted by personnel of the Lolo and Bitterroot 

 national forests and the Montana Natural Heritage 

 Program located nine more populations, many of which 

 contained up to several hundred individual plants. 



3. HISTORICAL SITES: Several populations were last 

 observed in the mid-1970 's but none should be 

 considered historical. 



4. UNVERIFIED/UNDOCUMENTED REPORTS: None. 



5. AREAS SURVEYED BUT SPECIES NOT LOCATED: 



Bitterroot National Forest 



T05N R18W SECTION 33, NW^SE^, 



T05N R18W SECTION 33, NE^SE^ 



T05N R18W SECTION 34, SW^NW-, 



T04N R18W SECTION 4, NW^NW^ 



T04N R21W SECTION 20, NW^SWH 



T04N R21W SECTION 6, NE^NW^ 



T04N R22W SECTION 1, SE^SE^ 



T04N R19W SECTION 4, S'-sNW^ 



