Holloway. — The Prothallus and Young Plant of Tmesipteris. 



35 



both these characters present in the aerial stems. I sectioned also some 

 material, obtained from a tree-fern, which presented a very typical example 



3& 



iRbWP^ 



°t%Jr 





Fig. 88. — Transverse section of aerial stem of mature plant. X 60. 



Fig. 89. — Transverse section of aerial stem of mature plant, showing coalescence 

 of neighbouring xylem groups into bands, and also a leaf-trace. X 60. 



Fig. 90. — Transverse section of single xylem group in stele of aerial stem of 

 mature plant. X 175. 



Fig. 91. — Transverse section of base of aerial stem of mature plant of Tmesi- 

 pteris tannensis which showed characteristic short erect xerophytic habit, 

 showing strongly lignified cortex and presence of brown deposit. X 50. 



Fig. 92. — Longitudinal section of stele of rhizome of same material as that 

 indicated under fig. 91, showing method of deposition of brown sub- 

 stance in inner cortical cells. X 70. 



of the form illustrated by Miss Sykes as T. tannensis. The aerial stem 

 was short and suberect and very compact in habit, and the rhizome firm 

 and brittle. A transverse section taken towards the base of this particular 



2* 



