Thought some of you might enjoy seeing the attached image of
an N. northiana upper pitcher. This was produced by my largest
plant, the female specimen which I've been growing for a number
of years. Interestingly, this pitcher was produced outside of
the special chamber in which this plant has been growing.
This is particularly noteworthy because the humidity outside
the chamber is essentially typical for the area in which I live,
which is quite dry. In fact, our humidity is often less than 20%!
Anyway, here it is. Note the fluted shape of the pitcher, which
is quite substantially different than the shape of the species'
lower pitchers. Moreover, I believe that this was produced
about eight feet up the vine, so I am quite sure that it qualifies
as an upper!
My wife was kind enough to hold the pitcher for a photograph.
Sorry about the lousy quality; wish that there was no
background shadow, but I didn't have time to hook up the ring flash....