453 
Insectivorous Plants ( Part II). 
selbst zu einer solchen Auffassung keinen geniigenden 
Anhaltspunkt bietet, die Kenntnis einer verwandten Form 
mit gegliederten Blattern notwendig.’ To the writer this 
appears a very loose method of discussing or explaining 
a morphological feature. In his description to which he 
refers in Schenck’s Handbuch (III. i, p. 238), he says, ‘Der 
Deckel is nur das obere Ende der Blattlamina.’ If the lid 
is only the upper end of the leaf-blade why does it usually 
show indications of two separate lobes, why are two distinct 
vascular bundles prolonged into it, and why is there a trans- 
verse vascular and even laminar connexion of the pitcher- 
wings in front of and beneath the pitcher-orifice? These 
problems are left untouched. In all four genera, Nepenthes , 
Heliamphora , Sarracenia, and Darlingtonia , we have to do 
with a greatly more complicated structure than a peltate leaf, 
and till it is viewed in a different light we cannot expect a 
better interpretation than that given by Goebel. Undoubtedly 
in N. Rajah , N. Northiana , N. Curtisii, &c., we have to deal 
with at least three successive laminar peltations from base 
to apex of the leaf, no matter what name we give to the 
laminar expansions that form these. 
Bower practically rejects the conclusion that the lateral 
growths on the terminal spur of a NepenthesAzdS. are rudi- 
mentary leaflets. They are lateral outgrowths from the sides 
of the mid-rib, in line with ‘ the smooth flanges ’ and the lid- 
lobes. They appear as early as, or earlier than, the lid-lobes, 
and I am unable to see under what possible category they 
can be placed if not under that given by me. 
Objection is also taken to the median flap of Sarracenia 
being regarded as a laminar fusion, and to this view being 
supported by comparison with the /rz>-leaf. But in quoting 
Goebel’s evidence on the latter 1 , Prof. Bower seems to attach 
no importance to the longitudinal vascular-bundle-distribution 
alike in embryonic and mature leaves, which entirely favours 
the view I advanced. If further evidence were needed, this 
is furnished by the leaf of Phormium tenax , which is widely 
1 Schenck’s Handbuch der Botanik, III. i, 219. 
H h 2 
