After a conserved name (nomen conservandum; see Art. 14 and App. II–IV) the abbreviation “nom. cons.” or, in the case of a conserved spelling, “orth. cons.” (orthographia conservanda) should be added in a formal citation.
Protea L., Mant. Pl.: 187. 1771, nom. cons., non L. 1753.
Combretum Loefl. 1758, nom. cons. [= Grislea L. 1753].
Glechoma L. 1753, orth. cons., ‘Glecoma’.
After a name rejected under Art. 56 (nomen utique rejiciendum, suppressed name; see App. V) the abbreviation “nom. rej.” should be added in a formal citation.
Betula alba L. 1753, nom. rej.
Rec. 50E.2 also applies to any combination based on a nomen utique rejiciendum (suppressed name; see Art. 56.1).
Dryobalanops sumatrensis (J. F. Gmel.) Kosterm. in Blumea 33: 346. 1988, nom. rej.
If a name has been adopted by Fries or Persoon, and thereby sanctioned (see Art. 13.1(d) and 15), “: Fr.” or “: Pers.” should be added in a formal citation. The same convention should be used for the basionym of the sanctioned name, if it has one, and for all combinations based on either the sanctioned name or its basionym.
Boletus piperatus Bull. (Herb. France: t. 451, fig. 2. 1790) was accepted in Fries (Syst. Mycol. 1: 388. 1821) and was thereby sanctioned. It should thus be cited as B. piperatus Bull. : Fr.; Chalciporus piperatus (Bull. : Fr.) Bataille is a subsequent combination based on it.
Agaricus sarcocephalus Fr. (1815) : Fr. was sanctioned as Agaricus compactus [unranked] sarcocephalus (Fr. : Fr.) Fr. (1821); Psathyrella sarcocephala (Fr. : Fr.) Singer is a subsequent combination based on it.