230 



DESC1UPT1TE CATALOGUE 



high. The cells composing the rays are of one kind and have 

 somewhat thickened walls. 



DETAILS OF ELEMENTS. The pith is composed of rounded thick- 

 walled cells, the size of these cells increasing towards the centre, 

 reaching about 1 00 p. in diameter. In vertical direction they are 

 not much elongated. The cell- walls are all thickened and pitted, 

 and between the rounded elements lie triangular intercellular 

 spaces. Among these are a few short elements of large size with 

 excessively thickened walls ($., text-fig. 65). These stone-cells 

 have no definite arrangement, and lie so that three or four appear 

 in each transverse section. They are not vertically elongated. 



Text-fig. 65. Podocarpoxyton Gothani, ep. nov. Transverse section of a 

 small part of the centre of the stem, p , pith-cells, among which are 

 s., the stone-cells; x., xylern. No. V. 13104 a. 



The primary wood forms small, rather irregular bundles, not 

 very well preserved in transverse section. In longitudinal 

 section a few of the spiral protoxylems are to be seen. No 

 centripetal wood can be recognised. The secondary wood consists 

 of tracheids rather variable in size, the average of the larger 

 element being 25-35 p x 40 ^ in diameter. The narrowest 

 autumn tracheids measure about 10^ x22^ ; they do not have 



