86 GUIDE TO TIMBERS OF NIGERIA 



35. Pores widely isolated ; little black matter in the grain, 



no gum-galls .... Piptadenia, page 49 



36. Colour crimson (at least on the cross-section) . . 42 

 36. Colour red with a brownish tinge ; pores isolated, 



rays red (in cross section) (cf. tr. sec., fig. 2, PI. IV) 



Khaya, page 26 



37. Brown with a greenish tinge (weathers dark brown) 



(cf. tr. sec., fig. 1, PI. Ill) . Cylicodiscus, page 47 

 37a. Yellow or some other shade of brown ... 38 



38. Pores very prominent in cross-section, on account of 



their wide borders ...... 39 



38a. Pores very small and obscure, need lens. Colour 



yellowish to nut-brown . . Adina, page 62 



39. Reddish-brown rich colour (cf. tr. sec., fig. 4, PI. Ill) 



Afzelia, page 37 

 39a. Neutral brown (cf. tr. sec., fig. 3, PI. Ill) 



Erythrophleum. No. 3292, page 43 

 40- Colour an intense yellow ; wood heavy and hard (cf. tr. 



sec., fig. 1, PI. IV) . . Sarcocephalus, page 57 



40n. Very pale yellow though somewhat deeper (citron) on 

 the cross-section (cf. tr. sec., fig. 6, PI. IV) 



Terminalia sp., page 55 



41. Colour a dull brown ; boundary-line continuous and 



frequently repeated (cf. tr. sec., fig. 2, PI. Ill) 



Brachystegia, page 41 

 41 a. Warm brown ; boundary-line rarely developed (cf. tr. 



sec., fig. 3, PI. Ill) Erythrophleum, No. 3292, page 43 



42. Pores connected by lines of light-coloured tissue (cf. tr. 



sec., fig. 2, PI. II) . Pterocarpus, 1992, page 34 

 42a. Pores isolated, but having broad light-coloured borders 

 (cf. tr. sec., fig. 3, PL III) 



Erythrophleum, No. 2997, page 46 



43. Zigzags on tang. sec. (plank-wise) very prominent ; 



pores filled with debris of a whitish colour (cf. tr. sec., 

 fig. 1, PL II) . . Klainedoxa, page 23 



43a. Zigzags very fine and need attention to find ; pores 

 filled with debris of a deep brown colour (lens) 



Papapa, page 81 



44. Pores seen with macroscope on cross-section, mostly in 



radial groups of 2-4 pores ; the rays are direct and 

 do not run round the pores Swamp Opepe, page 61) 

 44a. Pores (macro.) mostly single, a few pairs ; the rays 

 spread out at the point where they pass the rays 



Exccecaria, page 72 



45. Lines of light-coloured tissue exceptionally prominent 



Afzelia, No. 2823, page 40 

 45. Lines of light-coloured tissue less prominent on account 



of the lack of contrast ."> 1 



