help with tiger lilly identification

Hello all,
  I am wondering about Tiger Lillies.I am new to working with lillies and would appreciate any help.
  Now I have what seems to be a very prolific orange tiger lilly.
  For years I though that the plants were sterile and certainly won't self fertilize.
  I guess they have an inhibitor that prevents self fertilization similar to irises.
   
at any rate, I ran down to my neighbors garden and grabbed some pollen
from a yellow lilly that had similar features to my tiger lillies.

  the smae shaped flowers and long grass-like leaves or foliage.
   
  I am just trying to straighten out a couple of things.
I read recently that these orange tiger lillies are pod sterile. If
that's the case, then mother nature goofed with five nicely developing
pods on my tiger lillies.

  I am guessing that I have incorrectly identified the variety I have in my yard.
   
  Hemerocallis fulva
   
  I am positive this is the "tiger lilly" (which isn't a true lilly) growing in my yard.
   
if this is the case, what yellow variety did I acquire pollen from. Or
can the Lillium sp. and Hemerocallis sp. succesfully cross?

   
  thanks so much for any help.
  steve zone 4b northeastern minnesota
   
   

       
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