GUIDE TO TIMBERS OF NIGERIA 43 



to half the diameter of a large pore ; somewhat weak and 

 widely avoiding the pores. Proportion of the wood very 

 small. Number per mm. 10-14. 



Ground-tissue of varying density, but for the most part the 

 cells are just visible with the macroscope. They are apparently 

 in parallel concentric zones. 



Rings apparently denned by the denser bands ; the boundary 

 is perhaps indicated by a more prominent line of denser tissue ; 

 contour regular. 



Radial section. Parenchyma (a) quite distinct as borders 

 and tails to the pores, but it does not give the tone to the 

 section. P. (c) visible with attention. Vessels very promin- 

 ent ; contents as above. Rays very fine flakes, which are 

 visible by reflection on careful search. 



Tangential section as the radial, but the rays are minute 

 lines in parallel, causing a fine stippling which is visible to the 

 unaided eye. Height of rays about fifteen cells by one wide. 

 Vessels conspicuous as open grooves which show a tendency to 

 a zigzag tracery (but not to " partridge-wing figure "). 



SAPWOOD '" white " (Unwin, I.e. p. 277). 



BARK " Rough, scaly. A hard brownish gum exudes from 

 the tree when cut and hardens to a reddish, opaque mass " 

 (ibid. I.e.). " A red juice exudes " (Oliver, II, p. 306). 



USES, ETC. Public works (Unwin, p. 28) ; very durable, 

 but the sapwood soon rots on exposure to the weather 

 (p. 277). 



Density, No. 3003, 0-575, or about 36 Ib. per cu. ft. 

 2763, 0-622 39 



Conservator's note. " A large tree with a very big spread 

 of branches, growing chiefly on the banks of rivers and 

 streams." 



Erythrophleum guineense. G.Don. Leguminosae : Caesal- 

 pinese. Gen. No. 1976. 



Synonym. Fillcea suaveolens, Guill. et Pierre. 



LOCALITIES. Gambia, Sierra Leone, Gold Coast, Ivory 

 Coast, Togo, Nigeria, Congo, Cameroons, French Central 

 Africa, Gaboon, Dar es Salaam, Mozambique, Cape of Good 

 Hope. 



VERNACULAR NAMES. Akpa etuidiwi ; Arache, or Arachi ; 



