C. Phenology 



1. Patterns— Astragalus scaphoides generally blooms in June. 

 Fruit is matured in mid to late July. An occasional plant may 

 bloom as late as mid-July. 



2. Relation to climate and microcl imate--Unknown. 



D. Reproductive ecology 



1. Types of reproduction—Details of the breeding system are 

 unknown. A. scaphoides does not reproduce vegetatively , and I 

 suspect that flowers are mainly outcrossed. 



2. Pollination 



a. Mechanisms— Unknown , probably by insects. 



b. Specific known pollinators--Only chance observations of 

 pollination were made. Bumblebees ( Bombies spp.) were the 

 only pollinators observed at the flowers of A. scaphoides . 



c. Suspected pollinators—Perhaps moths. 



d. Vulnerability of pollinators—Unknown. 



3. Seed dispersal 



a. General mechanisms— Al though not directly observed, the 

 seeds of A^_ scaphoides are presumably shaken from the 

 legume which dries and opens at the tip while still on the 

 pi ant. 



b. Specific agents—Unknown. 



c. Responses of mechanisms— Unknown. 



d. Dispersal patterns— Unknown. 



4. Seed 



a. Amount of seed production— PI ants with fruit had an average 

 of 3-20 legumes per plant with a mean seed number of 3-9 

 (see Lesica in review). 

 9 



