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Ethel Sargant, A Theory of the Origin of Monocotyledons founded 

 on the Structure of their Seedlings ; Ann. Bot., Vol. XVII., No. LXV., 

 January, 1903. 



Solereder, Holzstruktur, 1885. 



Thwaites, Enum. Plant. Zeyl., 1860. 



Trimen, Flora of Ceylon, Vol. HI. 



Unger, Fossil Ebenacese, 1850, 1851, 1866, and 1867. 



Ursprung, Beitrage zur Anatomic und Jahresringbildung tropischer 

 Holzarten ; Inaug.-disser. Hohen. Phil. Fac. ; Basel, 1900. 



Ventenat, Tableau du Regne Vegetal, 1799. 



Vesqm, Gamopetales, iu Ann. sc. nat., Ser. 7, 1885. 



Wallich, East Indian Plants, 1828-1832, 



Weiss, Korkbild., in Denkschr. Regensb. bot. Gesellsch., 1890. 



Wiesner, Ebenholz, 1870. 



Wight, Icones Plant. Ind. Orient., t. 1. 227, 1850. 



Willis, Gynodicecism, &c. (3rd paper) ; Proc. Camb. Phil. Soc. , 1893 



Wright, Sex in Diospyros, Brit. Assoc., Belfast, 1902. 



Peradeniya, June 10, 1904. 



DESCRIPTION OF PLATES I XX. 



Plate I. Sections of the timber of (1) D.pruriens, (2) D. hirsuta, 

 (3) D. Moonii, (4) D. affinis, (5) D. Melanoxylon, and (6) D. ovalifolia. 



The relative sizes of the different trees may be calculated from the 

 measure photographed on Plate V. Obviously, the timber of most of 

 the species here described may be obtained in various sizes, but those 

 on the same plate are selected with a view to illustrating the relative 

 sizes of mature trees of the respective species. 



Plate II. Transverse sections of the timber of (7) D. sylvatica, 

 (8) D. oppositifolia, and (9) D. Thwaitesii. 



Figure 8 shows the characteristic hollow decaying protoxylem area 

 and the streaked nature of the remaining wood in D. opposifcifolia. 

 The rings of growth in D. sylvatica are perhaps clearer than in any 

 other Diospyros species. 



Plate ///.Transverse sections of the timber of (10) D. attenuate! 

 (12) D. Toposia, (13) D. imignis, with characteristic bark, and 

 (11) oblique section and log of D. acuta showing bark characteristic of 

 most Diospyros species. 



Plate IV. Transverse sections of (14) D. crumenata, (15) D. oocarpa. 

 and (16) D. Ebenum. 



The section of D. oocaroa is unusually large and is used to show the 

 large amount of streaked ebony of good quality which is frequently 

 found in this species. 



