The copyright protects the name, not the genetic makeup of the pepper. You can grow the white bullet and sell it under another name if you want. However any reference, no matter how oblique, to the copyrighted name would land you in hot water. Calling it 'White Projectile' would be asking for legal trouble.
Opposed to a plant patent which covers the unique genetic makeup of the plant. So propagation or selling unauthorized patented plants would be a patent violation, regardless of what name you called it. In the horticulture industry this is commonplace. Philodendron 'Xanadu' was originally patented, and when that patent expired, the grower released 'Xanadu 2' as an improved patented variety.
Edited by thegreenman, 15 April 2019 - 04:44 PM.