GENERAL SYSTEMATIC BACTERIOLOGY 129 



Examples: The following are admissible: Rosa Jundzillii var. leioclada and 

 Rosa glutinosa var. leioclada; Viola tricolor var. hirta, in spite of the existence 

 already of a diffeient species named Viola hirta. The following are incorrect: 

 Erysimum hieraciifolium subsp. strictum var. longisiliquum and E. hieraciifolium 

 subsp. pannonicum var. longisiliquum — a form of nomenclature which allows two 

 varieties bearing the same name in the same species. 



Recommendation. XVI. Botanists are recommended to use as little as possible 

 the privilege granted in the second part of article 29, in order to avoid confusion 

 and mistakes and also to reduce to a minimum the necessary changes of name when 

 the subdivisions of species are raised to specific rank or vice versa. 



Article 30. Forms and half-breeds among cultivated plants should receive 

 fancy names, in common language, as different as possible from the Latin names of 

 the species or varieties. When they can be traced back to a species, a subspecies 

 or a botanical variety this is indicated by a succession of names. 



Example: Pelargonium zonale Mrs. Pollock. 



Subsection 5. Names of hybrids and half-breeds (mules) 

 This subsection contains four Articles and one Recommendation. 

 It is not included here as it deals with problems which are not met in 

 bacterial nomenclature. 



Section 4- The publication of names and of the date of each name or com- 



bination of names 



Article 35. Publication is effected by the sale or public distribution of printed 

 matter or indelible autographs. 



Communication of new names at a public meeting, or the placing of names in 

 collections or gardens open to the public, do not constitute publication. 



Examples: Effective publication without printed matter: Salvia oxyodon 

 Webb and Heldr. was published in July, 1850, in an autograph catalogue and put 

 on sale (Webb and Heldreich, Catalogus plantarum hispanicarum, etc., ah. A. 

 Blanco lectarum, Parisiis, Jul., 1850, in folio). — Non-effective publication at a 

 public meeting: Cusson announced his establishment of the genus Physospermum 

 in a memoir read at the Society des Sciences des Montpellier in 1773, and later in 

 1782 or 1783 at the Soci6t6 de M^decine de Paris, but its effective publication 

 dates from 1787, in the M^moires de la Soc. Roy. de M^decine de Paris, vol. V, 

 1" partie. 



Comment. The statement that the communication of new names at 

 a public meeting does not constitute valid publication, is of particular 

 interest to bacteriologists. Priority is always determined from date 

 of publication and not from date of presentation. A committee 

 appointed by the Society of American Bacteriologists on the classifica- 

 tion of bacteria at a meeting of the society recommended the use of 

 the generic name Erwinia to include certain bacteria producing 

 diseases of plants. This did not constitute valid publication. 



