CHAP. XXXIII SPORE REPRODUCTION 129 



germinate. Such spores as those of the Bread Mould 

 and of the Mushroom might not be expected to con- 

 tain an embryo, but when we find no embryo in those 

 of mosses and ferns, we see the necessity for distin- 

 guishing* spore from seed reproduction. If we could 

 pursue the subject further, we should see further 

 reasons for emphasizing this distinction. 



IX. Spores are never preceded by any structures which 

 can be called, botanically, flowers, that is, by structures 

 containing stamens, or pistils, or both. 

 K 



