264 Scott and Sargant — On the Pitchers of 
In the middle of the root, between the four rings, is a little 
parenchymatous pith. This peculiar structure recalls the 
anomaly of the stem of A can thophyllu m , described by Dan- 
geard 1 . Between each xylem-mass and the surrounding 
phloem is a complete ring of cambium. The whole structure 
may be described as a 4 pseudo-polystely.’ 
Between 6 and 7 mm. from the insertion the xylem-masses 
fuse laterally, and the internal phloem comes to be completely 
enclosed by a ring of wood, while it itself encloses a few partly 
obliterated pith-cells at the centre. In this region the root is 
pentarch. 
Further down, the arrangement becomes more complex 
again, the xylem-ring opening out, so that internal and 
Woodcut B. 
From transverse section of pitcher-root 20 mm. below apparent insertion : 
px, protoxylem ; x , xylem ; ph , phloem, x 240. 
external phloem once more become continuous. An addi- 
tional complication appears, owing to the fact that some of the 
protoxylem-groups are here separated from the other xylem, 
and the phloem extends between the two (see Woodcut B, 
which is drawn from a section taken at 20 mm. from the base 
of the root). A few mm. lower down, the xylem is com- 
pletely broken up into sixteen or more isolated groups, 
separated by phloem. Woodcut C is drawn from a section at 
33 mm. from the base, where the xylem has united again to 
form a smaller number of groups. The large total amount of 
phloem in this part is striking. 
1 Le Botaniste, t. i. 1889/ 
