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ILLINOIS ACADEMY OF SCIENCE 



O 



pendages varied in length, being sometimes from 25 to 30 

 times as long as the diameter of the pollen grain itself. Some 

 were very slender and threadlike, others were proportionately 

 thicker. To this phenomenon we have applied the name "pseu- 

 do-germination" Altho at first sight this protoplasm expansion 

 might be mistaken for germination tubes, closer examination 

 easily reveals the distinction, for they lack most of the essential 

 characteristics. In the first place the expansion is far too 

 rapid to represent actual growth. Then there is no envelop- 

 ing membrane surrounding the protoplasmic substance as in 

 the true germination tube. The resemblance is close enough, 



