This section is from the book "The Gardener's Monthly And Horticulturist V23", by Thomas Meehan. See also: Four-Season Harvest: Organic Vegetables from Your Home Garden All Year Long.
A Western correspondent says: "Is it in your opinion a settled fact that there are two species of catalpa. Why I ask this is because last fall when gathering seed in Arkansas, I found trees growing side by side that had come from the same seed planted at the same time, etc., (of this I am certain,) some of which had all the appearance and form of the speciosa, while the other had the different bark, seed, etc., by which the Eastern species is recognized. I picked seed only from those bearing seed of the ' speciosa.' It puzzles me to know whether there are two species or not, after all?"