Yes Pankaj ji
Here is the information from my book (some things must have missed copy
pasting from Pagemaker)
*Names of Hybrids*
Hybridity is indicated by the use of the multiplication sign, or by the
addition of the prefix ‘notho-’ to the term denoting the rank of the taxon,
the principal ranks being nothogenus and nothospecies. A hybrid between
named taxa may be indicated by placing the multiplication sign between the
names of the taxa; the whole expression is then called a hybrid formula:
1. Agrostis X Polypogon
2. Agrostis stolonifera X Polypogon monspeliensis
3. Salix aurita X S. caprea
It is usually preferable to place the names or epithets in a formula
in alphabetical order. The direction of a cross may be indicated by
including the sexual symbols ( : female; : male) in the formula,
or by placing the female parent first. If a non-alphabetical sequence is
used, its basis should be clearly indicated.
A hybrid may either be interspecific (between two species belonging to
the same genus) or intergeneric (between two species belonging to two
different genera). A binary name may be given to the interspecific hybrid or
nothospecies (if it is self-perpetuating and/or reproductively isolated) by
placing the cross sign (if mathematical sign is available it should be
placed immediately before the specific epithet, otherwise ‘x’ in lower case
may be used with a gap) before the specific epithet as in the following
cases (hybrid formula may be added within the parentheses if the parents are
established):
1. Salix x capreola (S. aurita X S. caprea)
or Salix Xcapreola (S. aurita X S. caprea)
2. Rosa x odorata (R. chinensis X R. gigantea)
or Rosa Xodorata (R. chinensis X R. gigantea)
The variants of interspecific hybrids are named nothosubspecies and
nothovarieties, e.g. Salix rubens nothovar. basfordiana.
For an intergeneric hybrid, if given a distinct generic name, the name
is formed as a condensed formula by using the first part (or whole) of one
parental genus and last part (or whole) of another genus (but not the whole
of both genera). A cross sign is placed before the generic name of the
hybrid, e.g. XTriticosecale (or x Triticosecale) from Triticum and Secale,
XPyronia (or x Pyronia) from Pyrus and Cydonia, and Agropogon from Agrostis
and Polypogon.. The names may be written as under:
1. XTriticosecale (Triticum X Secale)
2. XPyronia (Pyrus X Cydonia)
The nothogeneric name of an intergeneric hybrid derived from four or
more genera is formed from the name of a person to which is added the
termination -ara; no such name may exceed eight syllables. Such a name is
regarded as a condensed formula:
XPotinara (Brassavola X Cattleya X Laelia
X Sophronitis)
The nothogeneric name of a trigeneric hybrid is either: (a) a condensed
formula in which the three names adopted for the parental genera are
combined into a single word not exceeding eight syllables, using the whole
or first part of one, followed by the whole or any part of another, followed
by the whole or last part of the third (but not the whole of all three) and,
optionally, one or two connecting vowels; or (b) a name formed like that of
a nothogenus derived from four or more genera, i.e., from a personal name to
which is added the termination -ara:
XSophrolaeliocattleya (Sophronitis X Laelia X Cattleya)
When a nothogeneric name is formed from the name of a person by adding
the termination -ara, that person should preferably be a collector, grower,
or student of the group.
A binomial for the intergeneric hybrid may similarly be written as under:
XAgropogon lutosus (Agrostis stolonifera X Polypogon monspeliensis)
It is important to note that a binomial for an interspecific hybrid has a
cross before the specific epithet, whereas in an intergeneric hybrid, it is
before the generic name. Since the names of nothogenera and nothotaxa with
the rank of a subdivision of a genus are condensed formulae or treated as
such, they do not have types.
Since the name of a nothotaxon at the rank of species or below has a
type, statements of parentage play a secondary part in determining the
application of the name.
The grafts between two species are indicated by a plus sign between two
grafted species as, for example, Rosa webbiana + R. floribunda.
--
Dr. Gurcharan Singh
Retired Associate Professor
SGTB Khalsa College, University of Delhi, Delhi-110007
Res: 932 Anand Kunj, Vikas Puri, New Delhi-110018.
Phone: 011-25518297 Mob: 9810359089
http://people.du.ac.in/~singhg45/
On Tue, Aug 9, 2011 at 8:08 PM, Dr Pankaj Kumar <[email protected]>wrote:
> Trinomial Nomenclature if not found in plants but they exist in
> animals.
> Like
>
> Cervus eldi eldi.
> Panthera tigris corbetti
>
> etc.
>
> These are actually not subspecies or varieties.
>
> To me, Bi-generic name is a different thing and even there are
> trigeneric names and they do exist in plants especially among hybrids.
> Like Aranda = Aerides + Vanda
> Sophrolaleocatleya = Sophronitis + Laelia + Cattleya.
>
> I hope I am on the right track.
>
> Pankaj
>
>
>
>
>
>
> On Aug 7, 6:54 pm, Gurcharan Singh <[email protected]> wrote:
> > Shinde ji
> >
> > Could you kindly provide some more information about this reference? A
> > bigeneric name generally is formed by combining the first part (or whole)
> of
> > one genus and second part (or whole) of second genus. The classical
> example
> > is X*Triticosecale* (Triticum aestivum x Secale cereale). Of course
> there
> > is no binomial available for this, being man-made hybrid.
> >
> > Binomials are available for some naturally formed intergeneric hybrids.
> Here
> > is an example:
> >
> > X*Agropogon lutosus* (Agrostis stolonifera X Polypogon monspeliensis)
> >
> > Trinomials we generally use for infraspecic taxa. I would be interested
> to
> > know what trinomial is meant in this reference.
> >
> > --
> > Dr. Gurcharan Singh
> > Retired Associate Professor
> > SGTB Khalsa College, University of Delhi, Delhi-110007
> > Res: 932 Anand Kunj, Vikas Puri, New Delhi-110018.
> > Phone: 011-25518297 Mob: 9810359089http://people.du.ac.in/~singhg45/
> >
> >
> >
> >
> >
> >
> >
> > On Sun, Aug 7, 2011 at 6:15 PM, Rajendra Shinde <[email protected]>
> wrote:
> > > Hello,
> >
> > > I have come across a reference of Trinomial or Bi generic names by M.
> Cato
> > > ( De Re Rustica). Tried to search on these for few examples but could
> not
> > > locate it. Can any one throw some light on these names? any examples?
> >
> > > Thanks
> >
> > > Shinde
>
