By way of contrast, this B filifolia was sown at the same time and has been grown in idential condtions. It is just starting to produce branches (as can be just about be seen at towards the apex of the stem). It is a cross between the Honeymoon Beach and Pago forms (both, I understand, from the Pago region).
The Nep at the back is bicalcarata. The pitcher that is in view is old and dried. I grow Nep bical, ampullaria and albomarginata, and also petiolaris complex Drosera and D hartmeyerorum with my tropical Byblis. All grow very well.