GUIDE TO TIMBERS OF NIGERIA 45 



contents, amber and red. Proportion of the wood, including 

 P. (a), about one-quarter. 



Rays visible with lens, very fine ; of one kind only ; colour, 

 dark amber ; regular in size, but not in spacing ; tending to 

 avoid or run round the vessels ; intervals vary from about 

 twice the thickness of a ray up to twice a pore-diameter ; 

 weak ; thin ends fairly numerous. Number per mm. 12-16. 

 Proportion of the wood, about one-fifth. 



Ground-tissue-cells not visible with the macroscope. 



Rings apparently well defined to the unaided eye, but less so 

 with lens ; boundary, a line of contrast between laxer and 

 denser zones ; contour regular. 



Radial section. Rays just visible as minute brown lustrous 

 flecks rather darker than the ground. Vessels often twinned, 

 containing small quantities of resin. P. (a) visible as hoary 

 borders and tails to the vessels, or, sometimes, with macroscope, 

 as transparent veils over the latter. Rings not traceable except 

 by the roey appearance of the grain. 



Tangential section as the radial, but the amber contents of the 

 vessels and also the parenchyma are more readily visible. 

 Rays just visible as a matt effect, brown, in parallel or in 

 echelon ; height about ten cells by 1-3 wide. 



SAPWOOD. " Dull yellow " (Unwin, I.e.). " Reddish 

 white " (Chevalier, 1909, p. 179). 



BARK. " Dark brown, thick, scaling off to a slight extent 

 in old age " (Unwin, I.e.). " Light grey to dark brown, 

 fissured " (Harms, I.e.). " Grey, wrinkled, scaling in small 

 plates and red in colour within " (Chev., 1919, I.e.) and (1917, 

 p. 179) " Greyish-white, finely fissured longitudinally, falling 

 away in little scales ; thickness about 10 mm. ; reddish-brown 

 in section." 



Density, No. 3292, 0-929, or about 58 Ib. per cu. ft. 

 3264, 0-91 57 



3294, 0-89 55J 



2997, 0'96 60 



Holland gives 0-876 and Chevalier 0-821 (1909) and 0-910 

 (1917, p. 179) and again 0-639 (p. 182). 



Conservator *s note. " A large tree fairly plentiful in the 

 mixed deciduous forest. Another species is found in the ever* 

 green forests. The timber, which is hard and does not float, is 



