4 i 6 Macfar lane.— Observations on Pitcher ed 
of the genus suggests the former existence of some connecting 
types, alike on the Nepenthes and Sarracenia sides. 
III. General Morphology and Histology of the 
FLOWERS OF DARLINGTONIA, SARRACENIA, AND HELI- 
AMPHORA. 
All botanists have traced in these three genera so many and 
close similarities as well of pitcher as of flower-structure, that 
they have agreed in grouping them into one order ; but while 
Darlingtonia and Sarracenia have very close floral relations, 
Heliamphora deviates widely. The complete pentamerous 
and gaudy flowers of the first two contrast with the last, 
which bears 4 rarely 5 white or rosy sepals and a tricarpellary 
pistil maturing winged seeds, but in these very points decided 
affinities are established with Nepenthaceae. If the ordinal 
descriptions given in De Candolle’s Prodromus by A. de Can- 
dolle for Sarraceniaceae and by Sir J. Hooker for Nepenthaceae 
be compared, the remaining characters will be found to agree 
fundamentally. To return to this at a later stage, we may 
now describe and compare the floral parts of each genus. 
( a ) Darlingtonia. 
While working at the lid-glands of Nepenthes , on speaking 
of its floral structure to Mr. Lindsay he drew my attention 
to the fact that from the glands, which Hooker mentions as 
occurring on the sepals, a very copious flow of honey takes 
place during flowering. The hint thus obtained being followed 
up, has yielded me some interesting results. Hooker 1 says of 
Darlingtonia that he was struck with ‘ a remarkable analogy 
between the arrangement and colouring of the parts of the leaf 
and of the flower. The petals are as highly coloured as the 
flap of the pitcher, and between each pair of petals is a hole 
(formed by a notch in the opposed margins of each) leading 
to the stamens and stigma. Turning to the pitcher, the 
relation of its flap to its entrance is somewhat similar. Now 
we know that coloured petals are specially attractive organs, 
1 Brit. Assoc. Address, Belfast, 1874. 
