NOTE 
THE WOOD OF TETRACENTRON, TROCHODENDRON, DRIMYS, AND 
OTHER TYPES. — Messrs. Bailey and Thompson in their paper published in the 
Annals of Botany, October, 1918, erroneously attribute to me an expression of the 
view that Tetracentron is descended from a form that possessed wood-vessels which 
have been lost in subsequent evolution. In my paper (Annals of Botany, xxiv, 1910) 
to which they refer, I merely ventured to suggest and supply evidence in favour of 
the possibility that the tracheidal structure of the wood of this and certain other 
genera might represent cases of degeneration from a previous tracheal condition. 
I then thought, as I still think, that the information available in regard to these 
anomalous Angiosperms is not sufficient to render possible a decision in favour of 
either of the two phylogenetic explanations of their wood-structure. 
PERCY GROOM. 
[Annals of Botany, Vol. XXXITI. No. CXXIX. January, 1919.] 
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