From what I have seen many of the seeds on the Sparra's site appeared to be derived from seeds from the NALS seed exchange. That exchange is closed now but will be back next year. Keep in mind that donors get first choice, then members, then others.
Here is the link to this years exchange so you can get an idea of the offerings. Just click on the division at the top to see the list of those seeds. Trumpets and aurelians are in Division 6.
http://www.lilies.org/mainhtml...
