ILLUSTRATIONS. 



Page. 



Fig. 1. Map of the world on Mercator's projection 9 



2. Map of Africa 12 



3. Heads of four kafir varieties 14 



4. Plants of shallu, representing the variety roxburghii, Hackel 15 



5. Plants of an Abyssinian sorghum not yet headed 18 



6. Plants of white durra from different countries, showing varying 



characters 20 



7. Plants of different varieties of sorghum from India 22 



8. Plants of two varieties of kowliang from China 24 



9. Plant of Chinese sorgo 25 



10. Plant of sorghum, after Fuchs, 1542 26 



11. Plant of sorghum, after Dodoens, 1583 27 



12. Heads of Holcus sorghum, L., and Holcus saccharatus, L., after Ardu- 



ino, 1786 28 



13. Head of Holcus cafer, after Arduino, 1786 29 



14. Head of Holcus niger, after Arduino, 1 786 „ 30 



15. Plant and head of Holcus cernuus, after Arduino, 1786 31 



16. Plant of sorghum, after Mattioli, 1598 38 



17. Heads of three sorghum varieties figured in 1869 45 



175 



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