Barclaya flowering

My barclaya longifolia are sending up flowers.  Anybody have experience with
pollenating and germinating this species?  Rataj/Horeman claims they're
self-pollenating, even if the flowers never reach the surface; does this
mean I should just leave them alone to do their thing?  And, should I get
that far, are there any tricks to germinating the seeds?  Thanks in advance.