Journal of 



Applied Microscopy 



and 



Laboratory Methods 





Volume V. 



MAY, 1902. 



Number 5. 



THE SPERMATOZOID OF GINKGO. 



NOTES ON THE MORPHOLOGY AND METHODS. 



The discover}' of the spermatozoids among the Gymnosperms is one of the 

 most remarkable events in plant morpholog}' during the last decade of the nine- 

 teenth centur}-. In the spring of 1896, Mr. Hirase, a Japanese botanist, found 



-mm 





Fig. 1-<?. — -Large (iinkgo tree in the Bo- 

 tanical Garden of the Tokyo Imperial 

 University. 



Fig. 1-^. — The Ginkgo tree, nearer view, 

 showing the lower part of the stem. 



the spermatozoids in the pollen-tube of Ginkgo bi/oba, and reported his discovery 

 at the meeting of the Tokyo Botanical Societ}'.^ Later, in the same year. Prof. 

 Ikeno, another Japanese botanist, discovered the spermatozoids in Cycas revoluta. 



I. The Botanical Magazine, Tokyo, 10: 171-172, May, 1896. 



(1773) 



