GUIDE TO TIMBERS OF NIGERIA 31 



warps but little ; it is attacked by termites " (Unwin, I.e.). 

 The wood needs no other advertisement than the example of 

 the fittings at Cambridge. 



Density, No. 1887 HS., 0-467, or about 29J Ib. per cu. ft. 

 2904 0-496 31 



4033 0-62 39 



1897 HS. 0-465 29 



1839 HS. 0-492 31 



,, ,, 2725 (received as Tasmanian Walnut ! !) 



,, 3620 (received as Guarea) 0-54 or about 34 Ib. 



'per cu. ft. 



(NoTE. The difference in density is considerable in some cases, 

 which fact may point to a mixture of species, but the difference 

 is not greater than most species may at times present). Cheva- 

 lier (I.e.) gives 0-514. 



Pterocarpus tinctorius, Welwitsch. Leguminosae : Papi- 

 lionacese. Gen. No. 1837. 



NOTE. There is great difference in the various specimens 

 reputed to be of this species, that we have seen. Our descrip- 

 tion is from one received from the Government of Nigeria 

 (Benin, our No. 3623), but another kindly lent to us by Mr. 

 Unwin, which agrees with a third (our No. 1992 HS.), though 

 similar in structure, is so very much lighter in weight that we 

 feel sure that it cannot be of the same species. Mr. Unwin 

 vouches for the identity of his specimen, so we append a des- 

 cription of this. Holland says that Camwood is easily dis- 

 tinguished from Barwood by the fact that the former sinks 

 in water, whereas Barwood floats. Our specimen of Camwood 

 (Baphia nitida) sinks like a stone, and No. 1992 would 

 probably float even when freshly felled, so according to Hol- 

 land's test would be Barwood, but No. 3623 occupies an 

 intermediate position, floating when dry, though it would 

 certainly sink when green. 



Unwin (1920) does not mention P. tinctorius in his list of 

 Nigerian species (pp. 272-275), but on p. 31 he refers to it as 

 the " South Nigerian Camwood." As much confusion has 

 arisen between the Barwoods and Camwoods, we propose to 

 confine the former name to species of Pterocarpus and Camwood 

 to Baphia. The name " Barwood " doubtless covers the 



