70 
G re gg . — On roots of Cycas Seemanni. 
i. r. inner rings, in each of which the half towards the centre of the root has been 
derived from the normal, the half towards the periphery from the first abnormal 
cambium, ex. pd. external periderm, st. b. normal ring of bundles in the stem, 
(x 2.) 
Fig. 4. Transverse section of a root of type 2. n. r. normal ring. 0. r. ab- 
normal outer rings. e. endodermis. p. pericambium. ex. pd. external periderm, 
(x 4.) 
In Figs. 3 and 4, the xylem is coloured yellow, the phloem blue, and the 
periderm brown. 
