6 

 In addition, for each reproductive plant we recorded the number 

 of inflorescences and the number of fruits matured. 



We classified plants into four life-stage classes: 



Seedling = S, 

 Single Rosette = R 1 

 Multiple Rosette = S >1 or R^ 

 Reproductive 



A plants *s demographic properties are often more closely 

 correlated with life-stage (Werner and Caswell 1977, Caswell 

 1989) , although both age and size may be important in predicting 

 an individual's fate (Young 1985). We chose these classes 

 because they correspond to age as well as size (Table 1; Lesica 

 and Shelly, unpublished data) . These categories also represent a 

 reasonable compromise between having many categories with too few 

 observations each and few categories with many observations 

 (Vandermeer 1978) . 



We censused Arabis fecunda in the permanent plots in late 

 May, 1987-1990. We chose late May because A^. fecunda fruits are 

 mature or nearly so, but dispersal has not yet occurred. Plants 

 smaller than 0.5 cm in diameter were not recorded because they 

 could not be reliably distinguished from other species. The 



