PHYTOCRENE, 925 
Between this agd the barkis occupied chiefly by cellular 
tissue, angular muriform towards the wood, hence roundish, 
but towards the bark it is irregular. 
Inthis in the sinuses of the angles of the wood appears 
the parallelogrammie plates, and between these and the bark, 
but all round, is a formation of young fibrous tissue, the cóm- 
mencement of the next true wood. 
Parallel plates of mémbranous impunctate tubes! each sur- 
rounded by highly punctuated fibres of considerable diameter 
occurs ; of the extent of these membranes I know nothing, 
and sometimes they are partly punctuate. Their presence is 
confirmed by the transverse section of the other species made 
by my friend Mr. J. W. Grant, C. S. sometimes the membra- 
nous tubes have here and there no interposed fibres. 
In the main, or larger branches, there is a distinct ring 
round the pith, the truncated cylinders of which are now 
beautifully punctuated. This ring is not visible on a thin 
transvere section, it is continuous with the wood, than which 
it is less tubular, but has no line of demacration. 
Then comes the former wood with 8 radiating lobes, owing 
to the parallelogrammic plates, which appear now nearly to 
Teach the pith, but the new formed part, is, I think, or will 
be wood, from its presenting largish perforations. The new 
formed outer part of each plate has a whitish cellular appear- 
ance very different from that of the old. 
The white cellular tissue,—the ground work of the struc- 
ture, presents between the first wood and the bark (out- 
Wardly less complete, 3 new ligneous formations. The 
first is well enough developed, generally no new distinct pa- 
rallel plates are to be seen, only in one case in which it was 
Opposite to the main one. 
On the circumference of each woody tubular system, 
Occurs mucilaginous tissue which appears to consist of de- 
veloping fibres generally in that round the 2nd wood, divided 
Into. wedge-shaped lines, the wedges having their narrow 
