n a second part designation other
than the appropriate formula. On the whole, however, it is usually
desirable to have a second part, collective designation, rather than a
formula only. Whether such designation should be a Latin name or a
vernacular phrase, or both, depends on a number of factors which, as I
have said, are not yet fully worked out or appreciated. Broadly
speaking, if there are a large number of cultivars of a particular cross
and these cultivars form a well-marked group, distinct from other hybrid
groups in the genus, it is useful to have a vernacular designation for
general use, _e.g._ 'Bellingham Hybrids' for all cultivars of the cross
_Lilium Humboldtii_ x _pardalinum_. This purpose can, however, be
equally well served by a Latin name, _e.g. Camellia_ x _Williamsii_ for
all cultivars of the cross _C. japonica_ x _saluenensis_. Whichever
method is chosen, two points are of great importance. Firstly, if a
Latin name is given, it _must_ be accompanied by a Latin description.
Secondly a vernacular designation _must_ contain some such word as
Hybrids, Crosses, or the like, to distinguish it from a cultivar-name.
The practice, in some groups, of giving "straight" cultivar-names as
second part collective designations, followed by "var. so-and-so," is
condemned by the Code. Existing names of this kind, however, can easily
be brought into line by adding a word such as Hybrids or Grex to the
old, second part, cultivar-name, and omitting the "var." thus,
_Cattleya_ 'Fabia' var. 'Prince of Wales,' would become _C._ ('Fabia
Grex') 'Prince of Wales' (Grex can he abbreviated to G. if desired).
This alteration may seem over-pedantic, but if, in the naming of
cultivated hybrids, a clear distinction is not kept between second and
third part names, confusion, as I have pointed out, is likely to result.

I will finish this section on the naming of hybrids with one or two
additional points on the correct method of writing their names. Here are
the full names of three cultivated hybrids:--

_Rubus_ (_rusticanus inermis_ X _thyrsiger_) 'Merton Thornless.'
_Camellia_ X _Williamsii_ 'Donation.'
Rose (Hybrid Tea) 'Richmond.'

The following points should be noted:--

(_a_) If a formula or a vernacular designation is used as a second part
name, it should be placed in brackets between the generic name and the
cultivar-name.

(_b_) If a Latin name is used as a second part name, and the hybrid is
between plants belo