20 INTERNATIONAL RULES FOR BOTANICAL NOMENCLATURE 
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pression of Ehrhart’s, has been applied to a ee characterized by 
A. Dietrich, Spec. Pl. ii. 89 (1833).—8. Names like peasegeslie 
(a single word — the first), Sebastiano- Suhdierte and Neves- 
stan 
Article 55. Sen names must also be rejected in the 
following special cases :— 
Examples. 1. Boletus vicesimus sextus, Agaricus octogesimus 
nonus.—2,. Linaria Linaria, Raphanistrum Raphanistrum, &c. 
Article 56. In the cases foreseen in Articles 51 t 56, the 
name to be rejected or changed is replaced by the oldest valid name 
in the group in question, and in default of such a ono a new name 
must be made. 
Examples. See the examples cited under Articles 51 and 53. 
The original spelling of a name must be retained, 
typographic or orthographic error. When the 
= 
xamples: Rubia and tee Monochete and Monochatum, Peponia 
and Peponium, Iria and Iris 
COMMENDATIONS. 
XX. The liberty of making orthographic corrections must be 
used with reserve, especially if the bes affects the first syllable, 
and above as the first letter, of a n 
y names differ ty a single letter without risk 
of confusion i Durvillea and Urvillea). ‘In cases where a close 
of error (ex. Astrostemma and 
Asterostemma in one and the same family, Ataleniioote, Pleuripe- 
talum in Orchidaceae), only one, the older, of the names should 
be kept, in accordance with Article 51, 4 
IV. Modification of the Rules of Botanical Nomen- 
clature. 
Article 58. The Rules of Botanical Nomenclature can only 
be Y competent persons at an International Congress 
convened for the express purpose. 
