My 8" N. gracilis showed what I think is sunburn after a bright day recently, and I would like your opinions as to whether or not it was sunburn.

It (and a few other spps. that showed the same signs, not not so severly) has nice moist soil, in a greenhouse with not much shade, and is in a new mix of bark, perlite and spagnum. Water has been mostly rain or distilled.

The parts of the leaves that were affected were the center and sides, not the points. The traps show drying out on the lids, but no where else.