Date: Wed, 25 Feb 1998 17:30:30 From: SCHLAUER@chemie.uni-wuerzburg.de To: cp@opus.hpl.hp.com Message-Id: <aabcdefg753$foo@default> Subject: Re: Cultivars
Dear Stefan,
> Couldn't a new cross be established as a cultivar group?
More or less. The cross itself should have features shared by all
plants belonging to that cross.
> For example, if I were the first to cross S.leucophylla with
> S.purpurea, and wanted to formally establish this cross as S.x
> 'mitchelliana,'
You can either validate the scientific taxon name S. * mitchelliana
(which has been done already) or you can describe some of the plants
as cultivars and unite them in a group (that would have to be called
Mitchell Group or something like that in order to avoid a Latin
epithet).
> wouldn't all S.x(leucophylla x purpurea) hybrids be in the
> cultivar group S.x 'mitchelliana?'
Apart from the fact that "mitchelliana" (Latin) is not a suitable
epithet for a cultivar group (Art.19.6. ICNCP), the assignment of
cultivars to specific cultivar groups must be performed for each
cultivar individually and explicitly. A cultivar does only belong to
a taxon automatically (or rather, as soon as a taxonomist pastes a
lable to the plant). So all these hybrid cultivars would belong
to (or be taxonomic synonyms of) S. * mitchelliana, but would not
necessarily belong to a Mitchell Group. The multiplication symbol
should be dropped in cultivar names or cultivar-group names. It may
(but does not need to) be used in taxon names.
> Any plants of this cross with uniqueness could then be established
> as cultivars of the cultivar group S.x 'mitchelliana.' If so, then
> this seems to be what Peter DiAmato is suggesting.
This is, however, not entirely the spirit of the ICNCP, which
requires that cultivar groups are composed of named cultivars.
Art.4.1. ICNCP reads: "Assemblages of two or more similar, named
cultivars within a genus, species, nothogenus (hybrid genus),
nothospecies (hybrid species) or other denomination class may be
designated as cultivar-groups."
This is one of the most heavily commented articles in the entire ICNCP
(8 examples, 4 notes).
The orchid passus is found in Note 4.:
"In orchids, a particular grouping on the basis of known parentage,
of which the unit is the grex (plural: greges, although often written
as grexes); is in long standing use. This use is described in The
handbook on orchid nomenclature and registration (Current (4th.)
Edition: Greatwood, J., Hunt, P.F., Cribb, P.J., & Stewart, J.
(eds), 1993. The handbook on orchid nomenclature and registration.
The International Orchid Commission, London, U.K.)"
Art.4.6.:"The designation of grex is not to be applied except in the
case of orchids (see Art.4. Note 4)."
Art.19.10.:"To be established, cultivar-group epithets may not
contain the following words (or their equivalents in any language):
cross, form, grex, group (except as the final word), hybrid, mutant,
seedling, selection, sport, strain, variety, the plural form of these
words, or the words improved and transformed."
Kind regards
Jan
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