Ramaley : observations on egregia menziesii. 9 



different from n and 12. 1S-26. Branched proliferations, some with, 

 some without vesicles ; the former are more often branched; thus 26 

 is more common than 25. 27. Group of gonidia-bearing prolifera- 

 tions, the part above the dotted line in each is sterile. All these figures 

 were drawn from fresh material and are one half natural size. 



Plate IV. 2S-34. Drawings illustrating anatomical structure. 28. 

 Diagram of a vertical section of the rachis, X 16; the emergences are 

 seen to consist only of outer tissues, the pith web is about one third 

 of the entire thickness of the rachis. 29. Longitudinal vertical sec- 

 tion of the epidermis and the hypodermal region of the rachis from a 

 section 5 microns thick; the outer walls of the epidermis are some- 

 what thickened, X 500. 30. Cross section through the inner cortex 

 of the rachis, the thickened walls give the tissue the appearance of 

 collenchyma, x 500. 31. Drawing of a portion of the pith web of 

 the rachis. Some trumpet hyphas are seen. The hyphas extend in 

 every direction and are cut in different ways. All the cells have gela- 

 tinous thickening of the walls, so that they appear as if in a gelati- 

 nous matrix, x 500. 32. Diagram of a vertical section of the lamina 

 showing the thickening of the pith web below the emergences, X 16. 

 33. Cross section of a proliferation of the lamina; it will be seen that 

 the cells in the middle of the structure are somewhat thick-walled. 

 The epidermis here is composed of short prismatic cells, x 170. 34. 

 Cross section of the wall of a small air vesicle. The epidermal cells 

 are tall and prismatic in shape, the cells next the air cavity are some- 

 what thick-walled and rather flat; in older vesicles the epidermal cells 

 are more flat, x 170. 



