Xi Wang wrote in message news:5oI_c.320405$J06.197116@pd7tw2no...
(big snip)
I mean, no two Violet Charms are the same unless they are clones.
(snip)

The grex system is not designed to uniquely identify each and every
unique hybrid plant. The ability to give plants clonal names does
that. It augments the grex system to allow you to distinguish between
plants that have identical ancestry but different phenotypes.

The grex system records ancestry, so that breeders can reconstruct the
geneology of hybrids. This gives them some idea how to replicate or
modify a line of breeding. Most other groups of horticulturally
important plants do not follow the grex system. Instead, each unique
plant is given a cultivar name that is published with a description of
the plant. Technically, a plant with completely different ancestry
could be the same cultivar if it meets all the criteria in the
description.

Each system has advantages and disadvantages. In the orchid grex
system, a plant is useless if its ancestry is unknown. With a
cultivar system, a beautiful plant with unknown ancestry can still be
described and used for hybridizing. The key is to write a
sufficiently detail description so that unrelated plants do not fall
into the same cultivar.

Nick
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