I grow Paw Paws, took them 7 years to bloom. Bloom is beautiful, like a red leather bell. The fruits are quite unique. Geo Washington and Thomas Jefferson liked them for desert. They're trying to colonize the area they're in from underground runner roots. I believe they serve as a food or environment to the Zebra Swallowtail butterfly. I've only seen the Zebra ST once here but it was under the Paw Paw trees.
The fruit's viability is short-lived which is the reason they're seldom if ever seen in the grocery store.