INDUCED APOGAMY 

 Doodia caudata the pairing among approximately 70 chromosomes present is so high as to 

 suggest that though gametophytic this plant is not a haploid but a diploid derivative of 

 an allotetraploid strain. In Scobpendrium vulgare, on the other hand, pairing in its 36 

 chromosomes is so low as to be quite absent in the very few cells which have been seen. 

 In this case, therefore, alone among all the examples of apogamy so far examined, we 

 seem to have a genuine haploid sporophyte. S. vulgare itself may therefore be accepted 

 as a genuine diploid species without any ambiguity. 



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