THE TIMBERS OF COMMERCE 



Colour. Brownish heart- wood well defined from the brownish 

 or dirty-white sap-wood. 



Anatomical Characters. Transverse section : — 



Pores. Clear on account of their size and also from their masses : 

 size 2, great variation : a conspicuous pore-ring of a single, al- 

 most perfectly continuous row of large, oval pores (nearly i| 

 times as long as broad) : the remainder of the Ring occupied by 

 very small, closely-packed pores, size 4 to 5, in long wavy lines or 

 festoons : these small pores decrease but little in size outwards. 



Rays. Just visible, size 4, uniform : equidistant : the width 

 of a large pore apart : many, 5 to 9 per mm. : long, tapering both 

 ends : denser than the ground-tissue : brown : straight, not 

 avoiding the pores. 



Rings. Very clear. Boundary the conspicuous pore-line 

 contrasted with the dense, small-pored Autumn wood. My speci- 

 men has 13 rings per inch. Contour undulating. 



Soft tissue. In patches or isolated cells here and there near 

 the Pores. 



Pith. ? 



Radial Section. Colour light brown with darker lines. Pores 

 very prominent, open, coarse, brown lines. Rays pale, incon- 

 spicuous, narrow flakes. Rings fairly evident as the pores of 

 the pore-ring are regularly exposed. 



Tangential Section. As the Radial, but the colour inclines 

 more to silvery or hoary-brown. Pores much finer though more 

 are exposed at a time. Rays appear as minute lines (lens) about 

 o - 5 mm. high. Rings, prominent brown lines and fringed loops 

 with silvery fringes between. 



Type specimens from commercial sources. Unauthenticated. 

 I have given a specially full description of this species in the hope 

 that it will lead to the identification of this useful wood. It is 

 without doubt an Elm. Inquiries made of the Canadian authori- 

 ties through the medium of Kew failed to eiicit any information. 



No. 176. CAMDEBOO STINK-WOOD. Celtis 

 Kraussiana. Pursh. 

 Plate XIII. Fig. iio. 



Natural Order. Urticaceae. 



The synonym quoted by Wiesner, C. rhamnifolia, does nat 

 appear in the Index Kewensis. Charpentier calls it Rhamnus 

 celtidifolia probably in error for R. celtifolia. Thb. 



Alternative Names. Soft grey Stink-wood : Umvanuri (61). 

 Um-Vumvu (Fourcade). Kamdeboo Stinkhout. 



Source of Supply. South Africa. 



Physical Characters, etc. Recorded dry-weight 49J-53 lbs. per 



200 



