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75 The naming of organisms (and plant communities)
ex-type, [ex typo]: (1) from the type; used for example for microscopic
slide preparations made from type material. (2) (bot.) a living isolate
made from the type of a name when this is a culture permanently
preserved in a metabolically inactive state; the kind of type can also
be indicated (e.g. ex-holotype, ex-lectotype). (2) (zool.) part of the
original type specimen separated from that original.
f.: (1) form (q.v.); (2) figure (q.v.); (3) filius (q.v.)
f. sp. [pl. ff. sp.]; see special form.
F 1 hybrid: (cult. pl.) a plant breeding term for the result of a repeatable
cross between two pure-bred lines.
F 2 hybrid: (cult. pl.) a plant breeding term for the result of self-pollination
within a population of F 1 hybrids.
facies: (phyt., obsol.) an hierarchical rank of a syntaxon, subordinate to
subassociation but not covered by the Code.
facsimile: of a work, an exact reproduction, produced by copying and
reprinting the original pages photographically or by electronic
scanning; the production of a facsimile edition does not affect the
date of publication for nomenclatural purposes, which remains that
of the original.
facultative synonym: a taxonomic synonym (q.v.).
fam.: see familiaris, family.
familiaris, [fam.]: (zool., unoff.) appended in quotation marks after the
name of a wild ancestor of a domesticated animal (e.g. Canis lupus
'familiaris'), or placed in rounded brackets before the subspecies
epithet in a trinomen of the ancestor (e.g. Canis lupus (fam.)
palustris), to indicate the taxon from which the domesticate has
been derived; see exfamiliaris, praefamiliaris.
family, [familia, fam.; pl. families, familiae, fams]: (1) (bot., zool.) a
taxon at the rank of family, the principal rank between order and
genus. (2) (zool.) a rank within the family group (q.v.).