Thank you for the info , I have 3 specie,s of the Chiranthodendron pentadactylon.
This yellow one (i have two off theme, grown out about 300 seeds),is a crossing and the result i have made with one off the Chiranthodendron pentadactylon and a Fremontodendron.
Even have tried last year with some ducktape to keep a seedpot as long as possible on the tree , no succes however.
But i will try the pantyhose.