Observations on Pitchered Insectivorous 
Plants. (Part I.) 
BY 
J. M. MACFARLANE, D.Sc., F.R.S.E. 
With Plate XVII. 
Introduction. 
HE following observations were begun in the autumn of 
JL 1884, and most of the anatomical details were worked out 
by the middle of 1885. I gave in 'Nature 5 (25th December, 
1884) a short general account of my earlier results. After its 
appearance I was able to work out the subject in considerable 
detail, but for various reasons the publication of my completed 
research has been greatly delayed, though I presented a 
general epitome of it at two meetings of the Royal Society 
of Edinburgh in the summer of 1885. 
A dissertation thesis was published by Zipperer 1 in May 
1885, in which he confirmed some of my results which had 
previously appeared in ‘ Nature. 5 
Five genera of pitchered insectivorous plants are at present 
known, viz. Nepenthes , Heliamphora , Sarracenia , Darlingtonia , 
and Cephalotus. All of these, except the second, have been 
in general cultivation for years. Heliamphora , described by 
Bentham in 1842 2 from dried specimens, has recently been 
introduced from Mount Roraima by Mr. Veitch of Chelsea, 
and through his kindness I have been able to examine fresh 
specimens. 
1 Beitrag zur Kenntniss der Sarraceniaceen. Miinchen, 1885. 
2 Trans. Linn. Soc. XVIII (1842). 
Annals of Botany, Vol. III. No. X. May 1889.] 
