PLATE XIV 



Ribes viscosissimum (29a and 29b) 



Vessels present; vessels predominantly solitary, in pairs, 

 or in various aggregates; vessels forming a zigzag pattern, 

 radially alined; perforation plates scalariform; rays three to 

 many cells in width, often massive, dispersed between uni- 

 seriate rays . 



Ribes irriguum (26c*) 



(See page 30) 



Ribes lacustre (27c**) 



(See page 32) 



