Manchester Memoirs, Vol. xlvi. (1902), No. D. 19 



PLATE XIII. 



Stigmarian rootlet (Hick Collection, No. 109). 



Fig. I. General view of rootlet ( x 8). 



o.c. = the thin outer cortex. 

 jH.c. = the massive middle cortex. 

 In the centre the stele surrounded by the thin- 

 walled inner cortical cells. 



Fig. 2. A much enlarged view ( x 80) of the vascular branch of 

 the stele in the middle cortex. 

 i.e. = inner cortex. 

 px. = apex of protoxylem. 

 tr. = tracheid strand. 

 s/i. = sheath. 



F:g. 3 View of stele, inner cortex (i.e.), and the adjoining 

 portion of middle cortex (m.c.), showing the 

 character of the latter and the vascular branch 

 of the stele running into cortex ( x 40). 



v.i^. = vascular branch. 



px. = protoxylem. 



Fig. 4. Outer portion of rootlet ( x 40) showing — 

 o.e. = outer cortex. 



fn.e. = middle cortex, with the secondary tissue 

 (s.t.) developed in its outermost layers. 



