98 



COMPETITION AND CONSTANCY. 



of Cleome serrulata are smaller, pink in color, and grouped in conspicuous 

 spike-like racemes; nectar is abundant, but the odor of the plant is strong. 

 The flowers of Geranium richardsoni are white and occur scattered at the 

 ends of branches; they are somewhat larger than those of the raspberry, 

 but contain much less nectar and pollen. Those of Chamaenerium angusti- 

 folium are about the same size, of a deep-pink color and arranged in a bril- 

 liant raceme often 2 or 3 feet long; the value in both nectar and pollen closely 

 approaches that of the raspberry. The single flowers of Frasera speciosa 

 are fairly inconspicuous, but the massive spike-like clusters are visible 

 at considerable distances. The nectaries are highly differentiated and the 

 flow abundant. Mertensia sibirica differs from all the others in having 

 tubular flowers of a blue color; they produce a scanty amount of pollen 

 and nectar (plates 3, 7, 8, and 10). 



Table 65. — Natural and bouquet competition. 



Experiment 1, \]4 hours, 10 h 30 m to 12 a.m., June 27. 

 Experiment 2, 1 hour, 10 h 10 m to ll h 10 m , July 6. 

 Experiment 3, 1 hour, 8 h 30 m to 9 h 30 m , July 7. 

 Experiment 4, 1 hour, 8 h 30 m to 9 h 30 m , July 7. 

 Experiment 5, 1 hour, 9 to 10 a.m., July 12. 



