ANATOMY OF TIMBER-PRODUCING TREES 345 
(2) ‘The Taxonomic History and Geographical Distribution of the 
Monotoidez ’ (American Fournal of Botany, xxii, 505. 1935). 
(3) ‘ Notes on the Status and Nomenclature of the British Elms’ (seven 
articles in the Gardener’s Chronicle, August to November 1934). 
(4) ‘ The Elm Problem’ (Quarterly Journal of Forestry, April 1935). 
The following will appear shortly : 
(1) ‘The Wood Anatomy of Representative Members of the Mono- 
toideze ’ (American Journal of Botany). 
(2) ‘ Material of Marquesia acuminata from Northern Rhodesia’ (Kew 
Bulletin). 
(3) ‘The Dipterocarps in Africa’ (a note in the Empire Forestry 
Journal). 
Continued work on the Monotoidez supports the view, expressed in last 
year’s report, that the members of the group are closely related to one 
another, and, as a whole, to the Dipterocarpacez rather than to the Tili- 
acez ; and that the timbers can be of little value economically outside the 
areas where they occur naturally. 
New material from Nigeria has just come to hand ; this, in conjunction 
with the fossil Dipterocarps from Mount Elgon (described in detail in the 
American fournal of Botany, vol. xxii, p. 164, 1935), indicates very interesting 
possibilities with regard to the previous history of the Dipterocarps in Africa. 
The work on the Elms has indicated that the genus is in a highly variable 
and plastic condition, and that hybridisation has taken place freely amongst 
the British species. A considerable amount of field-work outside the 
British area has also been carried out in this connection. 
The timbers of the different species and hybrids vary greatly in their 
value from the utilisation point of view; and a thorough systematic 
_ investigation of those types which produce easily worked timber is desirable. 
