wow, those are some awesome plants. here are my guesses:
1. flava x something. the wavy lid on the pitcher in the foreground makes me think there's some leucophylla in there, but the pitcher in the background doesn't, and looks more like a flava x alata cross.
2 + 3 look like leuco x purp hybrids, with maybe something else involved also.
5 looks a lot like leuco x (leuco x purp) hybrids I've seen.
6 looks like alata x minor to me
7 looks like purp x minor
8 i think is purp x psittacina
9 is a cool plant, looks like a complex hybrid with leucophylla, psittacina and god knows what else.
10 is S. minor
11+12 look to be the same plant, it looks mostly like S. flava, but i noticed the flower heads are upturned, which is a trait of S. leucophylla, so I'm going to guess it's a moorei backcrossed on a flava. an awesome plant, indeed!
13 looks like S. flava var. maxima
14 looks like another leuco x purp hybrid
15 a hybrid between flava and another upright species/hybrid
16 i'm going to guess is an alata x rubra hybrid
17 i'm guessing leuco x purp or leuco x (purp x ?)
18 leuco x flava
19 i agree with cp-connection, some kind of introgressed purp hybrid, looks too upright to be pure purp.
20 looks like purp x minor on left, and purp x leuco on right
21 another awesome leuco x flava hybrid
22 looks like leuco crossed with purp x flava
23 this is perhaps my favorite, looks like psittacina x flava. at first glance i thought it was an anthocyanin-free plant, but you can see red coloration at the growth points, and the developing pitcher has some color suffusion. very interesting and unique! i actually had a leuco x flava once that was similar to this, not anthocyanin-free, but appearing so at first glance.
24 alabamensis, as previously stated
25 flava x rubra, or flava x alata perhaps?
27-29 cephalotus
30-31 darlingtonia
