378 MR. H. H. W. PEARSON ON SPECIES OF 
pitcher is removed from the branch, a narrow funnel-shaped 
depression is disclosed (Pl. 9. fig. 5, d.). At the bottom of this 
depression, immediately underneath the petiole, is situated the 
narrow orifice which gives into the main cavity of the pitcher. 
Its course is seen on removing a portion of the wall (fig. 3, a 
pointer, p., is inserted into the orifice). One or two roots 
arising from the petiole or from points on the stem close to it * 
enter the pitcher through the orifice (fig. 3,7.) and give rise to 
numerous branches, which in some cases almost fill the cavity. 
The greatest long diameter of the funnel-shaped depression is 
12-13 mm., that of the orifice being 2 mm. Fig. 3 also shows 
the remarkable structure which may be called the “inner 
pitcher.” It is formed by the inflexed margin of the outer 
pitcher. The inflexion takes place in the funnel-shaped 
depression opposite to the insertion of the petiole (fig. 3, 2h). 
The inflexed tissue is deeply grooved on the side towards the 
petiole—thus forming three sides of the depression—and corre- 
spondingly convex on the other side. This neck of tissue 18 
considerably thicker than the wall of the inner pitcher. The 
neck passes directly into the main cavity, at once expanding into 
the broad thin wall of the inner pitcher, which is quickly bent 
upwards through 180°, until its free margin rests almost in 
contact with the convex side of the neck (fig. 3, m.). The 
pocket thus formed is almost divided into two by a deep groove 
(fig. 4, g.), which extends in the middle line from the free margin 
to the bottom of the pitcher. The margin shows two lateral 
lobes (fig. 4, 7.), and a small median lobe, which, however, is not 
always present (fig. 4, ap.). Very minute glandular hairs are 
abundant on both walls of the inner and on the inner wall of the 
outer pitcher. 
The description just given will almost apply also to the 
Bornean specimen collected by Haviland (2015). The outer 
pitcher is approximately circular in outline (PI. 9. fig. 5). The 
inner one is smaller than in D. pectenoides, but shows indications 
of a higher degree of complexity. The character of the involution 
is the same, but the lateral portions of the free margin are 
continued upwards farther than in the last species, thus forming 
* My material does not enable me to ascertain the exact place of origin of 
these roots. The question is discussed with reference to D. Rajflesiana by 
Wallich (PI. As. Rar. vol. ii, p. 36), Treub (Ann, Jard. Buit. iii, p. 18), and 
hy Scott & Sargant (Ann. Bot. vii. p. 259). 
