74 



MISSOURI BOTANICAL GARDEN. 





subtllis Brunchorst. He makes no distinction between the 

 two host cells as they are affected by the fungus, but states 

 that the broken threads, "Stabchen," so-called by Shibata 

 (38), are the concentrated cell content of the hyphae, the 

 cell wall being unstained. Zach finds spore-like knots and 

 bacteria-like threads which are degenerate forms of hyphae. 

 These he claims absorb a great deal of water and thus fill the 

 entire cell lumen. The terminal swellings of the hyphae are 

 also degenerate stages of the fungus which are ultimately di- 

 gested by the host cell, during which process the fungal 

 masses pass through various degenerative stages. Spherical, 

 oval and other shaped bodies, of an oily consistency, appear 

 during the digestive process and to these he applies the name 



bata were found. 



Shi 



Zach (60) finds similar conditions in the host cell of the 



of Cycas revoluta, in which he recognizes a phe- 

 nomenon comparable to phagocytosis amongst animal cells. ' 



tubercles 



by 



have 



respects those of the alder, the present investigation was un- 

 dertaken with Elaeagnus argentea, and comparisons were 

 made with the more recent research carried on with alder 

 tubercles as well as those of Ceanothus and Myrica. The 

 tubercles were gathered in the autumn of 1909 from plants 

 growing in the Missouri Botanical Garden. It was found that 

 they do not occur as abundantly as on the alder and Ceano- 

 thus and, furthermore, are located on roots much deeper be- 

 low the surface than in the alder or Ceanothus. This, how- 

 ever, may be due to the fact that the Elaeagnus has its roots 



deeper in the soil. All plants of this species are 



much 



more 



llipponhae rhamnoi 



representatives of this family, were examined and both found 

 to possess tubercles quite similar to those of Elaeagnus argen- 

 tea. Thus all the genera of this family grown in the garden 



tubercles 



masses 



the alder are found, although they vary in size from a few in- 





