EXPLANATION OF PLATES 



The illustrations have all been draAvn by Dr. Helen M. Gilkey under the 

 direction of the writer. 



PLATE 36 



Chlorogloea lutea Setchell and Gardner 

 Fig. 1. A section through the host plant showing the general character of the 

 eudophyte. X 500. 



Xenococcus cliaetomorpliae Setchell and Gardner 



Fig. 2. A few elongated vegetative cells with interspersed gonidangia. X 125. 



Fig. 3. Vegetative cells on different parts of the cells of the host, Chaeto- 

 viorplia. X 125. 



Fig. 4. A group of cells near the cross wall of the host plant showing the 

 formation of gonidia. X 250. 



Xenococcus chaetomorpliae Setchell and Gardner 

 Fig. 5. A section of the host plant showing the habit of gi'owth of the endo- 

 phyte. X 250. 



Chlorogloea conferta (Kuetz.) Setchell and Gardner 

 Fig. 6. Habit sketch of a colony growing on Ehodochorton Botliii. X 500. 



Dermocarpa spheroidea Setchell and Gardner 



Fig. 7. Habit sketch of vegetative cells and two gonidangia showing shapes 

 and relative sizes. X 250. 



Hyella linearis Setchell and Gardner 



Fig. 8. Section of the host Frionitis — diagrammatic — showing an affected 

 portion inhabited by the endophyte which is shown as radiating groups of cells, 

 and with two gonidangia on the surface. X 125. 



Dermocarpa suffulta Setchell and Gardner 



Fig. 9. Plants selected to show variations in shapes and sizes. The two 

 empty cells are vegetative, the other three are gonidangia, one showing all of the 

 contents changed into gonidia, the exceptional condition. X 500. 



[452] 



