49.1. Author citation for a name at the rank of genus or below that has a basionym (Art. 6.10) comprises the author(s) of the basionym cited in parentheses followed by the author(s) of the name itself (see also Art. 46.7).
Ex. 1. Medicago polymorpha var. orbicularis L. (Sp. Pl.: 779. 1753) when raised to the rank of species is cited as M. orbicularis (L.) Bartal. (Cat. Piante Siena: 60. 1776).
Ex. 2. Anthyllis sect. Aspalathoides DC. (Prodr. 2: 169. 1825) raised to generic rank, retaining the epithet Aspalathoides as its name, is cited as Aspalathoides (DC.) K. Koch (Hort. Dendrol.: 242. 1853).
Ex. 3. Cineraria sect. Eriopappus Dumort. (Fl. Belg.: 65. 1827) when transferred to Tephroseris (Rchb.) Rchb. is cited as T. sect. Eriopappus (Dumort.) Holub (in Folia Geobot. Phytotax. 8: 173. 1973).
Ex. 4. Cistus aegyptiacus L. (Sp. Pl.: 527. 1753) when transferred to Helianthemum Mill. is cited as H. aegyptiacum (L.) Mill. (Gard. Dict., ed. 8: Helianthemum No. 23. 1768).
Ex. 5. Fumaria bulbosa var. solida L. (Sp. Pl.: 699. 1753) was raised to specific rank as F. solida (L.) Mill. (Gard. Dict. Abr., ed. 6: Fumaria No. 8. 1771). The name of this species when transferred to Corydalis DC. is cited as C. solida (L.) Clairv. (Man. Herbor. Suisse: 371. 1811), not C. solida “(Mill.) Clairv.”
Ex. 6. Pulsatilla montana var. serbica W. Zimm. (in Feddes Repert. Spec. Nov. Regni Veg. 61: 95. 1958), originally placed under P. montana subsp. australis (Heuff.) Zämelis, retains its authorship when placed under P. montana subsp. dacica Rummelsp. (see Art. 24.1) and is not to be cited as var. serbica “(W. Zimm.) Rummelsp.” (in Feddes Repert. 71: 29. 1965).
Ex. 7. Salix subsect. Myrtilloides C. K. Schneid. (Ill. Handb. Laubholzk. 1: 63. 1904), originally placed under S. sect. Argenteae W. D. J. Koch, retains its authorship when placed under S. sect. Glaucae Pax (see Art. 21.1) and is not to be cited as S. subsect. Myrtilloides “(C. K. Schneid.) Dorn” (in Canad. J. Bot. 54: 2777. 1976).
Ex. 8. The name Lithocarpus polystachyus published by Rehder (in J. Arnold Arbor. 1: 130. 1919) was based on Quercus polystachya A. DC. (Prodr. 16(2): 107. 1864), ascribed by Candolle to “Wall.! list n. 2789” (a nomen nudum); Rehder’s combination is cited as either L. polystachyus (Wall. ex A. DC.) Rehder or L. polystachyus (A. DC.) Rehder (see Art. 46.5).
Note 1. Author citation for a replacement name (Art. 6.11) comprises only the author(s) of the name itself, not those of the replaced synonym.
Ex. 9. Mycena coccineoides, a replacement name for Omphalina coccinea Murrill (see Art. 6 Ex. 15), is cited as M. coccineoides Grgur., not M. coccineoides “(Murrill) Grgur.” (see also Art. 58 Ex. 1, 3 and 4).
Note 2. Art. 46.7 provides for the use of parenthetical author citations preceding the word “ex” after some names in groups with a starting-point later than 1753.
49.2. Parenthetical author citations are not used for suprageneric names.
Ex. 10. Even though Illiciaceae A. C. Sm. (in Sargentia 7: 8. 1947) was validly published by reference to Illicieae DC. (Prodr. 1: 77. 1824) it is not to be cited as Illiciaceae “(DC.) A. C. Sm.”