12 GUIDE TO TIMBERS OF NIGERIA 



at the ring-boundaries ; 9-10 per mm. ; proportion of the 

 wood about one-third. 



Ground-tissue-cells visible with macroscope ; proportion of 

 the wood about one-third. 



Rings not traceable at all. 



Radial section. Colour much whiter than the other sections 

 on account of the large white flakes of silver-grain against 

 the decidedly yellow ground, both are lustrous and change 

 with the incidence of the light. Grain, fine, open, straight, 

 nearly empty. P. (a) just visible with the lens as tails to the 

 vessels. 



Tangential section -as the radial, but the larger rays appear 

 as lines rarely exceeding J inch in height ; the smaller rays 

 are not visible with lens, lacking contrast. The large rays are 

 apparently in echelon and thus form bands which are distinctly 

 visible over long lengths (over 10 inches). Small rays not in 

 parallel. The shining linings of the vessels show up as glistening 

 points. 



DENSITY. No. 3008, 0-72 or about 45 Ib. per cubic foot. 



Chevalier (1909, p. 148) gives 0-658 and (1917, p. 60) 0-753. 



BARK. " Whitish, not fissured, but covered with wide 

 depressions " (Chev. I.e. and 1917, p. 60) " Rusty-white, 

 wrinkled, not fissured, with ellipticalMepressions of the size of 

 a five-franc piece ; thickness unequal, thin and adherent to 

 the sap wood." 



Garcinia sp., Guttiferae. Gen. No. 654. 



Specimen " Agberigbede," No. 3609 received from the Gov- 

 ernment of Nigeria (Lagos). Alternative name, " Agberigncde. " 



GKNKKAF, CHARACTERS. A wood of medium weight and 

 hardness, coarse-grained and of a yellowish or brownish-red 

 colour much resembling a Cedar (Cedrela) ; dry to the touch, 

 not cold ; transverse only slightly darker than the other 

 -<tions; smell, none when dry ; works easily to a lustrous 

 surface. 



STRUCTURE. Transverse section. (Prepared with the plane.) 

 See PI. II, fig. 5. Parenchyma of one kind only : (a) sheathing 

 the vessels, extending tangentially and uniting them into 

 undulating lines which are often continuous over considerable 

 distances, frequently anastomosing ; colour buff ; width of 



