PLATE VII 



Rosa gymnocarpa (15a and 15b) 



Vessels present; vessels not markedly larger in early than 

 in late wood; growth ring distinct; vessels decreasing in 

 size from early to late wood; vessels relatively numerous; 

 vessels predominantly solitary or in pairs, except for initial 

 vessels which may be contiguous; perforation plates simple; 

 rays three to many cells in width, dispersed between uni- 

 seriate rays. 



Rosa woodsii (16a and 16b) 



Vessels present; vessels markedly larger in early than in 

 late wood; growth ring distinct; vessels decreasing in size 

 from early to late wood; vessels relatively numerous; ves- 

 sels predominantly solitary or in pairs , except for initial 

 vessels which may be contiguous; perforation plates simple; 

 rays three to many cells in width, dispersed between uni- 

 seriate rays. 



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