212 



LYCOPODIALES 



[CH. 



surface of the vascular strand. This leaf occurs in association 

 with a petrified stem of Sigillaria scutellata^. 



Renault^ has shown that the leaf-traces of Sigillaria 

 spinulosa (= S. Brardi) are accompanied in the outer cortical 



-9 



Fio. 200. A. Sigillaria Brardi [ = S. elegans Brongn. (39)]. Transverse 

 section of stem. 



B. Sigillaria Brardi [ = S. spinulosa, Kenault and Grand'Eury (75)] : 

 c', outer cortex ; x, x^, xylem. (After Eenault and Grand'Eury.) 



C. S. Brardi, primary xylem element. (A and C after Brongniart.) 



D. Leaf of Sigillaria Brardi : g, g, stomatal grooves ; ep, piece of 

 epidermis of stem. (After Renault.) 



E. Sigillaria Brardi. Tangential section of leaf-bases : p, parich- 

 nos. (After Renault.) 



F. G, H. Sigillaria leaf-scars and cushions. (After Weiss.) 



region of the stem by a fairly large amount of secondary xylem ; 

 in sections of the free lamina which he figures the secondary 

 elements are much less obvious and represented by a few 

 tracheae only. Similarly, in the leaf-base of S. Brardi 



Kidston (OT^). 



" Renault (96) A. PI. xxxvii. fig. 3. 



