Pieces of stems grow large in the flask without producing roots; best recourse is to remove them and pot them up without the roots but to cover them with inverted glass to protect against dessication. A73-615
Publications referred to as the authorities on methods: A66-40+ and A71-807+; refer to A74-34 for authors and titles.
Technique summarized; refer to A61-808+
Toxins produced in flask; reflasking may be advisable in the early stages, but may not be necessary, for reasons given; refer to A71-807+; refer to A74-300