There's plenty of herbarium specimens of Asimina spatulata but when you go to the link there's only the photos of Asimina angustifolia.
The full specimen can be got by viewing the image, and that image has Asimina angustifolia written on it. They must be the same? The Plant List has both as accepted.
https://www.google.co.uk/searc...
http://www.floraofalabama.org/...