PHYSIOLOGICAL PROCESSES AND RELATIONS 

 IN PLANTS 



PROBLEM VI 



The structure and work of the parts of a simple flower. 



Materials. Any simple flower, such as the buttercup, sedum, 

 etc., hand lens, compound microscope, sugar solution. 



a. The Flower 



Observations. 1. Find green leaflike parts (sepals). How 

 many are there ? 



2. Are they separate or united? Note. The sepals taken 

 together constitute the calyx. 



Conclusion. What do you conclude is their use or function ? 



Observation. How many colored parts (petals) are there ? 



Note. The petals taken together form the corolla. 



Conclusion. Can you think of any functions of the corolla ? 



Observations. 1. Observe a number of slender stalks (fila- 

 ments), with dusty knobbed ends (anthers), which taken to- 

 gether are called stamens. How many stamens are there ? 



2. Find just how the anthers are joined to the filament. 



3. What is the color of the anthers ? Appearance ? 



4. Can you find dustlike material (pollen) on and in the 

 anthers ? 



5. Can you find places in the anthers through which the 

 pollen has escaped ? 



6. Find some podlike structures (pistils or carpels), located 

 in the center of the blossom. How many are there ? 



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