North American Fruit Explorers mailing list at ibiblio

[Lucky Pittman <lucky.pittman@murraystate.edu>]

Osage Orange, in my experience is pretty easy to grow from seed.  Just 
collect those big green fruits, stick 'em off in a corner somewhere, maybe 
buried under some leaves, and allow them to become fully bletted.  You can 
then pick the seeds out.  They have a slight dormancy requirement, 
requiring 30 days or so at 40 degrees F, or by soaking dried seeds for a 
couple of days, according to Dirr.
I tried rooting pre-callused hardwood cutting a year or so back, but 
failed; but I had just stuck them in the ground, not in a rooting bed with 
bottom heat.  Supposedly, softwood cuttings, taken in July, root quite 
readily when treated with IAA.

An intergeneric hybrid between Maclura and Cudrania has been described(X 
Macludrania), but I know nothing about its form or fruiting habits.

Lucky