Catalpa Tree Pods Smoke The northern catalpa is a tree you likely recognize but may not know by name. Perhaps you've seen it adorned with striking clusters of large, white flowers, standing Catalpa Wikipedia How Do Juul Chargers Work? Wickedly Hot Vapors No these aren't giant tree green beans, but instead the seed pod of the northern catalpa. These bean like pods can grow to be 20" long and contain numerous 1" long seeds. #haverfordcollegearboretum #