394 PINGUICULA LUSITANICA. Crap. XVL 
(7): The flower-peduncles, sepals and petals, bear glands in 
general appearance like those on the leaves. A piece of a 
flower-peduncle was therefore left for 1 hr. in a solution of 
one part of carbonate of ammonia to 437 of water, and this 
caused the glands to change from bright pink to a dull 
purple colour; but their contents exhibited no distinct aggre- 
gation. After 8 hrs, 30 m. they became colourless. Two minuto 
cubes of albumen were placed on the glands of a flower- 
peduncle, and another cube on the glands of a sepal; but they 
were not excited to increased secretion, and the albumen 
after two days was not in the least softened. Hence these 
glands apparently differ greatly in function from those on the 
leaves, 
From the foregoing observations on Pinguicula lusi- 
tanica we see that the naturally much incurved mar- 
gins of the leaves are excited to curve still farther in- 
wards by contact with organic and inorganic bodies ; 
that albumen, cabbage seeds, bits of spinach leaves, 
and fragments of glass, cause the glands to secrete 
more freely ;—that albumen is dissolved by the 
secretion, and cabbage seeds killed by it;—and lastly 
that matter is absorbed by the glands from the insects 
which are caught in large numbers by the viscid 
secretion. The glands on the flower-peduncles seem 
to have no such power. This species differs from Pin- 
guicala vulgaris and grandiflora in the margins of the 
leaves, when excited by organic bodies, being inflected 
to a greater degree, and in the inflection lasting for a 
longer time. The glands, also, seem to be more easily 
excited to increased secretior. by bodies not yielding 
soluble nitrogenous matter. In other respects, as far 
as my observations serve, all three species agree in 
their functional powers. 
