OF LOWER GREENSAXD TLAXTS. 



11 



Each axis is traversed by a small solenosKele (about- 6 mm. in 

 diameter) which gives off in rapid succession a scries of horse- 

 shoe-shaped meristeles, the true petiolar bundles. As many as 

 17 of these small axes are recorded as being contained in a 

 single aggregate or " false stem." " In every transverse section 

 of the fossil all the stems are also cut across transversely. It 



Text-fig. 2. Plan of Teinpskya-stem in transverse section. Adapted from 

 part of photo 1, pi. i, Kidston & Gwynne-Yaughan, 1012, and showing 

 several steins imbedded in the weft of adventitious roots, s., suleno- 

 stele of stem ; I,, leaf-trace; r., adventitious root corning off from stem 

 opposite exit of leaf-trace. The arrows indicate the directions of 

 exits of leaf-traces in various stems, showing that they bear no relation 

 to the orientation of the common axis. 



follows, therefore, that they must have all grown very closely 

 parallel with the longer axis of the fossil'*' (Kidston & Gwynne- 

 Vaughan, 1912, p. 7). ..." All the stems bore leaves, and in 

 each individual stem the leaves are all inserted on the one side 

 of the stem. The side opposite to this gives rise to roots alone."' 



