The register is open

684 crosses have never been named

BreedToSeed can produce 723 strains. 39 of them are authored and named. The other 684 come out of crosses nobody curated, and the first player in the world to breed one names it - permanently, in everyone's game.

A cross whose parents nobody has discovered reads as ??? x ???, and resolves the moment the first player breeds that parent. So the tree becomes legible as people play: 0 of 684 crosses can be read right now.