Lynn,
The F1 Excaliber just means these are probably open pollinated seedlings from Excaliber. I'm sure Gary just had a bunch of them and gave them away as such. This wouldn't necessarily be just one cultivar but rather a bunch of seedlings. Each one would be different. You see why I compost mine or give them NO NAME now! Too much confusion! If a seedling is numbered I will use that designation until it merits a name.
Kevin
