GUIDE TO TIMBERS OF NIGERIA 47 



chyma obscure, just visible as tails to the pores and borders. 

 Rays visible by reflection as dark lines, but invisible in certain 

 lights. 



Tangential section. As the , radial, but the rays need macro- 

 scope ; not in parallel ; white as though crystalline and up 

 to about ten cells high, or 0-15 to 0-2 mm., mostly if not all 

 uniseriate. 



Pith? 



SAPWOOD. Oatmeal colour, striated with reddish lines (the 

 vessels, which colour before the other tissues) ; width about 

 2j inches, well, but not sharply defined from the heartwood. 



BARK. Reddish brown, about 6 mm. thick, hard and granu- 

 lar in texture, nearly the same throughout ; with many rather 

 large scleroses, which in the outermost layer form a nearly 

 continuous ring. A thin layer of oatmeal- coloured bast with 

 darker brown longitudinal flecks, within. 



Cylicodiscus gabunense, Harms. Leguminosse : Mimoseae. 

 Gen. No. 1976A. 



Synonym. Erythrophleum gabunense, Taub. 



LOCALITIES. Gold Coast, Calabar, Nigeria, Cameroons 

 (British sphere). 



VERNACULAR NAMES. Adadawa ; Aja ; Agaiji (com. to 

 Piptadenia) ; Aga-iji (com.) ; Ajumkobi ; Akan ; Anyan ; 

 Denya (com. to Pip.) ; Edum ; Greenheart ; Greenheart, 

 African ; Iji ; Mbeli-deli ; Odenya (com.) ; Okan ; Olosan ; 

 Osho. 



Description of the wood from a specimen, No. 3011 " Okan " 

 (Empire Timber Exhibition, 1920), received from the Govern- 

 ment of Nigeria. Our specimens Nos. 2802 HS. " Denya ; 

 Odenya " from the Gold Coast, 2765 HS. " Okan ; Green- 

 heart " from South Nigeria, 1891 HS. "Greenheart" and 

 1846 HS. " Mahogany " from commercial sources, all agree. 



GENERAL CHARACTERS. A rather hard and heavy wood of 

 a metallic greenish or golden colour, or even brown, striped 

 with light and dark zones here and there. It appears to be 

 very variable in weight. Surface beautifully lustrous, the 

 effect being due to refraction of light by the cells. Grain, 

 open, coarse, much inclined. Rather cool to the touch. Shade 

 of the transverse section distinctly darker than that of the 



