4i7 
Insectivorous Plants (Part II). 
and that the object of their colour is to bring insects to feed 
on the pollen or nectar, and in this case by means of the hole 
to fertilize the flower; and that the object of the flap and 
its sugar is also to attract insects, but with a very different 
result cannot be doubted. It is hence conceivable that this 
marvellous plant lures insects to its flowers for one object, 
and feeds them while it uses them to fertilize itself, and that, 
this accomplished, some of its benefactors are thereafter lured 
to its pitchers for the sake of feeding itself!’ This is true 
even in a more intimate way than Hooker imagined, not only 
of Darlingtonia , but of every genus of pitchered insectivorous 
plants. 
The sepals of Darlingtonia are provided with honey-glands 
like those of the outer pitcher-surface. The presence of these 
undoubtedly proves e that this marvellous plant lures insects 
to its flowers for one object, and feeds them while it uses 
them to fertilize itself, and that, this accomplished, some of 
its benefactors are thereafter,’ by the rich provision of food 
already described, * lured to its pitchers for the sake of 
feeding it.’ 
(b) Sarracenia. 
The three bracteoles and five sepals of all the species 
develop many honey-glands like those of the pitcher, and 
though I have only observed a sweet secretion on four or 
five out of about two dozen flowers examined, this may be 
explained by differences in greenhouse growth as compared 
with free growth in their native haunts ; or the secretion may 
exude only for a limited time. This point deserves further 
investigation. The petals vary greatly in colour and size, 
being small and of a dull unattractive green or greenish-yellow 
hue in vS. variolaris , largest and of a pale greenish-yellow in 
.S', jlava, small and greenish-crimson in .S', rubra , large and 
of a deep crimson-purple in 5. Drummondii , large and pur- 
plish-red or brick-red in the petals, and more or less also in 
the sepals in 5. purpurea and 5. psittacina. Thus the develop- 
ment and distribution of flower-colour in calyx and corolla 
indicates a relation in the species similar to that which we 
