VEGETATIVE ORGANS OF LYGINOPTERIS 329 



Each leaf was supplied by one of the primary xylem strands 

 which, as it passed outwards, became associated with phloem 



FIG. 1 88. The foliage (formerly known as Sphenopteris hceninghausii) of 

 Lyginopteris oldhamia. (From a drawing, after Potonie, lent by 

 Prof. F. W. Oliver, F.R.S.) 



and, on entering the pericycle, divided into two. The double 

 bundle (Fig. 189, Bs.) traversed several internodes before bending 



