EXERCISE 119 



The transfer of pollen from the anther of one flower to the stigma of another is in most cases 

 brought about either by the wind or by insects. 



Problem. What is there about flowers that makes possible the distribution of pollen by the wind ? 



What to use. A magnifying glass and a pair of sharp eyes. 



What to do. Examine the pollen, the stigmas, and the envelopes of many different wild and culti- 

 vated plants in the field, and note the probability of the pollen's being easily blown from the anther, 

 being easily carried by the wind, and being readily caught by the stigmas. Compare various kinds of 

 flowers to note differences that are likely to be significant in this connection. 



Record. Make a list of plants that you consider to be probably wind-pollenated, and describe the 

 characteristics that lead you to your conclusions. 



NAMES OF PLANTS 



CHARACTER OF POLLEN 



CHARACTER OF STIGMA 



CHARACTER OF FLORAL ENVELOPE 



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