ible 3. Performance parameters for A r a b i s f e c u n d a in spotted 



knapweed removal (n=5) and control (n=5) plots at 

 Charleys Gulch (mean=SD). 



1987 

 Removal Contro 



Density ( p I a n t s / p I o t ) 12.8 + 3.9 



Fruiting plants/plot 5.8+2.7 



% plants fruiting 

 New plants 

 Dead plants 

 Population growth 



# fruits/plot 



# inflorescences/plot 12.2+6.7 

 Fruits/ inflorescence 2.2+0.3 



R emo va I 



14.2 + 3.6 14.4 + 3 .3 



4.6 + 2.6 0.4 + .5 



39.3+13.0 32.5+17.6 2.4+3.2 



4.2+2.6 



2.6+3.6 



0.15 



26.8+17.0 18.6 + 6. 7 4 .6 + 6 .8 



8.4 + 3 .8 1.0+1.4 



2.4+0.5 4.5+0.7 



if lorescence/frui t ing 

 plant 



2.1+0.5 



1 . 1 



2.5+0.7 



1989 



Control Removal Control 



14 .0+4.2 19.4+5.8 13.4+3.7 



0.4 + 0.9 6.4 + 4 .2 5.4 + 2.5 



4 . 0+8 .9 30.6+16.6 39.9+13.0 



3.0+2.9 7.0+3.2 2.6+1.3 



3.2+2.0 2.0+2.0 3.2+1.5 



-0.02 0.41 -0.08 



3 .4 + 7.6 104 .8 + 61 .9 82 .0 + 38. 1 



1.0 + 2.2 27.6+17.7 21. 2 + 9. 7 



3.4+0.0 3.9+0.4 3.8+0.3 



2.5+0.0 4.4+1.1 4.4+2.2 



