4- 



to be referred to. In paleobotany the usage is to quote in 

 parenthesis the original author of the name of a species or of 

 I subdivision of a species misplaced. 



AAV. ter. The citation of authors preceding the starting point 

 of nomenclature may be indicated when they are judged useful or 

 desirable, preferably between brackets or by means of the ex- 

 pression "ex.". The application of this procedure will prove 

 valuable especially in mycology when the question is whether^ to 

 ?efer to authors before Fries or Persoon. 



Examples:- Lupinus , ,[.Tournef. Inst. 592. t. 215 (1719) , Linn. Sp. 

 ed. I, 721 (1755) and Gen. ed. 4, 322, or Lupinus 

 Tourn. ex. L, - Boletus piperatus l. Bull . Hist. Chtop. 

 Pr. 518, t. 451 f. 2 ( 1791-1812 V":! Pries Syst. myc. 1. 

 388 (1821) or Boletus piperatus Bull. ex. Pries. 



Section 6. On names that are to be retained when a group is 

 divided, remodelled, transferred or moved from one rank to another 

 or when two groups of the same rank are united or when groups hav- 

 ing a pleomorphic life cycle are in question. 



Art. 49. bis. The different successive stages of the fungi with 

 pleomorphic life cycle (an amorphoses, status) can bear only a 

 single generic and specific name (binome): that is to say, the 

 oldest from the starting point of the nomenclature of the fungi 

 which has been applied to the perfect stage, provided that in 

 other respects it conforms to the rules. 



It is agreed tfor the purposes of nomenclature) 

 that the perfect stage of the fungi with pleomorphic life cycle is 

 that which bears the ascus in the Ascomycetes, the basidium in the 

 Basidlomycetes, the teleutospore in the Uredinales. and the spore 

 in the Ustilaginales. 



The generic and specific names given to the other 

 stages have only a temporary value. They may not be used to re^ 

 place a name applied to one or more species, any one of which 

 contains the perfect stage. 



The nomenclature of fungi not possessing a pleo- 

 morphic life cycle follows the general rules. 



Examples:- The names of Aecidium Pers . . Gaeoma Link, and Uredo 

 Pers. designate various stages (aecidiosporic with or without 

 pseudoperidia, uredosporic stages) in the group Uredinales. The 

 generic name Melampsora Cast. |;;Obs. 11, 18 (1843)j, applied to- 

 a genus defines at least the teleutospores , therefore cannot be 

 rep^^ced by the name Uredo Pers. ^ in Romer Heuggj y[a ( ;^ • I-m =4|^^ 1794)J 

 because the name T Jredp has been used to 2^ef^?^^^^|^^#y^^|f 

 the Dothideaceae {Ascomycetes), a species eC'^Sbd' Henu s rrod^^^ra 

 Nitschke, P. trifolii (Pars.) Puck. Symb . /^i»er( 18#9-^t#^--^sS^W~ 



" '' ■" ---//-- -- ' seft^.i: 



this spec- 



an older synonym in Polythrincium trifolii ngpTgHa 

 13, t, 1, f. 8 (1817) based upon the conidlai^ta 



les. 

 becaus 



The name Polythrincium cannot be suffist^tti^dpg:^^^. fehyllachora 

 e it refers to am imperfect stage, ^-'^rjif^ ^.v » 



