♦ 



Gulch (x^=7.72, P=0.005), but the latter two sites were not different 

 (X'=0.89, P=0.345). Thus, A_^ fecunda plants at Vipond Park matured earlier in 

 life than those at the other two sites. 



The number of fruits per reproductive plant varied significantly among 

 sites and years (Table 3). Over the course of the study, the mean for Lime 

 Gulch was 10.6, significantly lower than Charleys Gulch and Vipond Park which 

 had means of 14.6 and 14.5 respectively (Table 3). The number of seeds per 

 fruit also varied significantly among sites and years although differences 

 were not large (Table 4). Over the course of the study, the means were 30.9, 

 32.4 and 34.0 for Charleys Gulch, Lime Gulch and Vipond Park respectively. 

 Only Charleys Gulch and Vipond Park were significantly different (Table 4). 

 For both number of seeds per fruit and fruits per plant, there was a 

 significant interaction between the site and year effects, possibly due to 

 different weather conditions at the sites. 



Bolting plants 



Over the period of 1990-93 the mean percentage of reproductive plants 

 that produced a bolting inflorescence was 3%, 26% and 44% for Charleys Gulch, 

 Lime Gulch and Vipond Park respectively (Fig. 6). These differences were 

 statistically significant for all four years (x">7.3, df=2, P<0.05). 



Bolting plants had a mean of 19.9 fruits, while axillary-flowering 

 plants had a mean of 9.8 fruits, and this difference was significant (Table 

 5). There were also significant effects of year, and site X year interaction, 

 probably due to different weather conditions at the sites over the course of 

 the study. There was also a strong interaction between bolting and year, 

 suggesting that the number of fruits per plant is partially under 

 environmental control. Bolting plants produced an average of 36.8 seeds per 

 fruit, while axillary-flowering plants produced 29.8 seeds per fruit, and the 

 difference was significant (ANOVA, F=26.4, P<0.001). Number of seeds per 



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