A Thornless Contrast
This is the thornless blackberry growing beside the thorny one shown in the preceding picture. Not onloy have the thorns been completely removed, but the cane, as can be seen, has covered itself with a downy film, comparable only to the bloom which grows on plums. The plant shown here has possibly 100 feet of stalk and stem, every inch of which could be rubbed across the face without injury.
This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 6 Chapter 1