84 GUIDE TO TIMBERS OF NIGERIA 



10. Woods striated in radial section (quartered wood) 



showing zigzags in tangential section ( plank - 

 wise). .... . . . .11 



10a. Wood not striated though sometimes broadly striped, 

 otherwise uniform in colour ; heavy ; reddish to 

 purplish-brown . . . . . . .14 



11. The structure, striae and zigzags very bold 



Afzelia, No. 2823, page 40 

 11 a. Striations and zigzags delicate .... 46 



12. Colour yellow to brown or reddish-brown or yellow 



striped with brown . . . . . .37 



12a. Colour nut-brown to purplish-brown . 13 



13. Cross-section shows fine bars from ray to ray (needs 



macroscope). Colour deep nut-brown (cf. tr. sec. 

 fig. 6, PL III) .... Casearia, page 56 

 13a No such fine bars from ray to ray . . . .50 



14. Colour reddish-brown ; concentric lines usually visible 



Albizzia, page 52 

 14a. Colour purplish-brown ; concentric lines not visible 



without lens .... Papapa, page 81 



15. Colour pure white ; rays rather large and readily visible ; 



ring-boundary vague (cf. tr. sec. fig. 4, PI. IV) 



Scottellia, page 11 

 15a. Colour dirty white ; boundary of the ring fine but 



prominent . . . . . . . .16 



16. Colour white or sometimes yellowish, especially on the 



cross-section. Pores isolated from each other (cf. 

 tr. sec., fig. 6, PI. IV) . Terminalia sp., page 55 

 16a. Colour dirty white to brownish. Pores connected by 

 pale and obscure lines of soft tissue (cf. tr. sec., 

 fig. 5, PI. IV) . . Terminalia superba, page 53 



17. Colour green or greenish-brown, metallic lustre (cf. tr. 



sec., fig. 1, PI. Ill) . . Cylicodiscus, page 47 



17a. Colour red or yellow . . . . . .18 



18. Reds .19 



18a. Yellows 22 



19. Heavy red woods ....... 20 



19. Light weight to medium weight . . . .36 



20. Colour deep red like that of dried blood ; much chalky 



matter in the grain (cf. tr. sec., fig. 1, PL II) 



Lophira, page 14 

 20a. Colour brownish -red to rich crimson ; no chalky 



matter ........ 49 



21. Colour buff, surface dry . . Mitragyne, page 64 

 21 a. Colour yellow or yellow striped with brown, surface 



sticky ..... Adina, page 62 



22. Pores in cross-section (glass-papered) prominent and 



in straggling lines ...... 40 



