No, that is not so. Species are taxonomically labeled based on their sameness
in flower parts, not the foliage or even the bract. The actual sexual organs of
the flower part. You can have, say, a Brugmansia spp. From there, you can
breed the Brugmansia (in the solanacea family) to be yellow, or single flowered,
etc...those are cultivars because the hand of man insinuated this development.

I think what you are trying to distinguish is the difference between a variety
and cultivar, not cultivar and species. There are varieties and cultivar in any
given species. All dogs are not husky's. But they are all dogs. You cannot
make a dog from something else.

Similarly, you can't manufacture a plant species, unless you discover one which
has not yet been discovered.

Cultivar is the product of an introduction, by man/woman, to illicit a
particular feature of another variety within the species. Mate a husky with a
wolf, you get a hybrid, but still a canine.

Variety is something which, taxonomically did not depend on the hand of
man/woman to illicit features by design. It merely already exists. It can be
hybridized with another variety to form a cultivar, but it can never be bred to
be another species.

On Fri, 14 Nov 2003 10:57:26 +1100, "Peter Jason" opined:

Thank you for the replies. I am searching the US patent office plant
database for new species but most are "cultivars" which are produced by
grafting. In short I am looking for a case where grafting procedures
produce new species without viral interaction. I take it, then, that if a
cultivar can be cross bred with anything, and then produce Mendalian
breeding charateristics, we have a brand-new species?


wrote in message
...
species in animals means those individuals that can breed and produce
fertile
offspring, but plants means can produce viable seed when pollinated by
another of
same species.
cultivar is an unusual mutation AKA sport. For example, hosta are all one
species,
but you will see hosta that are blue, hosta that are splashed with white
or yellow.
these are cultivars and reproduced usually by division. in orchids this
is even more
important cause the cultivar is registered and cloned to make thousands of
identical
plants. Ingrid




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