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108 Terms used in Bionomenclature
inverted commas, [‘ . . . ‘]: (1) (bot., prok., unoff.) placed around names or
epithets to indicate that they have not been validly published under
the appropriate Code; i.e. to indicate designations as opposed to
names (bot.) or historical synonyms (prok.). (2) (bot.) placed around
names or epithets to indicate an original spelling that was in error
and has been corrected. (3) (zool., unoff.) placed around species
epithets in binomials of domesticated animals to indicate that they
are not separated as true species from wild ancestors, e.g. Canis
‘familiaris’.
in vitro: (mycol., prok.) of cultures studied, or tests conducted, in artificial
conditions in the laboratory.
in vivo: (mycol., prok.) of organisms studied, or tests conducted, in their
normal conditions, normally in nature, or at least on their normal
hosts.
-ion: (phyt.) the suffix terminating the name of a syntaxon in the rank of
alliance.
IPNI: see International Plant Names Index.
ipso facto: in the fact itself.
iscotype: see adelfotype.
ISHS: see International Society for Horticultural Science.
-isites: (palaeo. mycol., prop.) proposed as an alternative suffix to "-ites"
(q.v.) where necessary to avoid the creation of an homonym of an
existing generic name ending in "-ites".
iso-: prefix, a duplicate.
isocotype: (zool., unoff.) most probably used in the sense of topotype (q.v.).
isoform, [isoforma, isof.]: (cult. pl., unoff.) a category for the designation
of a form distinguished only by physiological characters; see
biological race.
isogenotype, [isogenotypic, isogenotypy]: (zool., unoff.) one of two or
more generic names based on the same type species.
isolate: (1) a living culture of bacterium, fungus, virus or other
microorganism obtained from a single source of infection or site,
and usually accorded a unique number; when shown to be