Brian
That is a thought - what happens under the leaf rosette? At the moment, plantlets are popping up across the compost and I'll have plenty of new plants. How they got there, I have no idea. However, there's still loads more on the "stem" but they are still reluctant to detach by physical force.
The P. vulgaris is flowering so I'll collect the seed again this year and sow that fresh.
It seems that the propagation of pinguiculas might be an interesting "project" to add to my fascination with alpines. If I make any progress, I'll post the results on the Forum.
Jack