(1435 m) is 1000-2000 feet (300-600 m) lower than 

 most of the sites in the Little Belt Mountains. 

 For the period 1951-1980 (U.S. Department of 

 Commerce 1982) , the January mean temperature was 

 20.5°F (-6.4°C), the July mean temperature was 

 65.2°F (18.6°C), and the annual mean temperature 

 was 44.2°F (6.8°C). The mean annual precipitation 

 was 15.34 inches (38.9 cm), with May (3.01 in) 

 (7.6 cm) and June (3.07 in) (7.8 cm) being the 

 wettest months. 



The Missoula climatic station is at 3190 feet (972 

 m) , about 400 feet (120 m) lower than the 

 Waterworks Hill site, which is the lowest known 

 occurrence of Phlox kelseyi var. missoulensis . 

 For the period 1951-1980 (U.S. Department of 

 Commerce 1982), the January mean temperature was 

 21.3°F (-5.9°C), the July mean temperature was 

 67.2°F (19.7°C), and the annual mean temperature 

 was 44.1°F (6.7°C). The mean annual precipitation 

 was 13.29 inches (33.7 cm), with May (1.62 in) 

 (4.1 cm) and June (1.85 in) (4.7 cm) being the 

 wettest months. 



F. POPULATION DEMOGRAPHY AND BIOLOGY 



1. PHENOLOGY: Flowering generally occurs from May 

 through July, with earlier flowering dates at 

 lower elevation sites. 



2. POPULATION SIZE AND CONDITION: Population sizes 

 range from a few plants to 10,000 plants. 



3. REPRODUCTIVE BIOLOGY 



a. TYPE OF REPRODUCTION: The flowers of Phlox 

 kelseyi var. missoulensis are perfect, and 

 probably protandrous and cross-fertilizing, 

 since most Phlox species are (Grant and Grant 

 1965). Campbell (1991) felt this slow 

 growing perennial had a low recruitment rate. 



b. POLLINATION BIOLOGY: Pollination mechanisms 

 have not been studied for Phlox kelseyi var. 

 missoulensis . However, its pollination 

 biology can be inferred from information on 

 other similar Phlox species. The corolla is 

 salverform and the stamens are inserted at 

 different levels in the corolla tube. The 

 stigma and anthers are well within the 

 corolla tube, and the corolla tube is 1.0-1.3 



