7. Population biology 



A. General summary—Populations of Astragalus scaphoides are generally 

 sparse to moderately dense. The Sheep Corral Gulch population 

 might be considered dense. In 1984 approximately half of the 

 individuals in five populations studied were non-reproductive. 

 Non-reproductive plants are not necessarily immature as some 

 non-reproductive plants had dried flower stalks of the previous 

 season still attached to their rootcrown. Five populations were 

 studied (Lesica in review). 



B. Demography 



1. Known populations--14 sites for A. scaphoides are known or have 

 been reported (see Precise occurrences). 



2. Demographic details of populations studied—Demographic details 

 of populations studied: Bon Accord Site - 1500 plants/acre; 54% 

 of plants are reproductive, average # fruits per fruiting plant 

 is 20+25; average # seeds per fruit is 8.5+5.7. Cold Spring 

 Creek - 1500 plants/acre, 57% of plants are reproductive; 

 average # fruits per fruiting plant is 20; average § seeds per 

 fruit is 7.3+4.9. Sheep Corral Gulch Site - 7,450 plants/acre; 

 41% of plants are reproductive; average # fruits per fruiting 

 plant is 8+4; average -f seeds per fruit is 3.1+3.7. Badger 

 Gulch Site - 1,250 plants/acre; 52% of plants are reproductive; 

 average # fruits per fruiting is unknown; average number of 

 seeds per fruit is unknown. Agency Creek Site - 560 

 plants/acre, 63% of plants are reproductive, average # fruits 

 per fruitng plant is 3; average number of seeds per fruit is 

 unknown. (See Lesica 1985 for additional information.) 



