PLATE XX 



Cornus stolonifera (38a, 38b, and 38c*) 



Vessels present; vessels solitary or in pairs (appearing as a 

 bisected vessel); vessels regular in size and spacing through- 

 out growth ring; perforation plates scalariform; rays one or 

 two cells in width (rarely three). 



Alnus sinuata (35c*) 



(See page 42) 



