I haven't spent any time collecting seeds of Phellodendron amurense
- yet another dioecious
species. They appear to ripen in late September into October as well.
You can just snip the entire fruiting cluster off, and then clean the pulp (which has an interesting fragrance) off the seeds. I have squished a few, and enjoyed the citrusy aroma.
Here are a couple images from Durand-Eastman Park in Rochester NY:
If you want MORE plants, contact someone in the mid-Atlantic growing region, where this species is a raging invasive pest plant.