INTERNATIONAL RULES FOR BOTANICAL NOMENCLATURE 17 
combinations must give a to more recent combinations in which 
the rule has been observe 
enus, 
species, or his reas of these ap ohles takes ee and, speaking 
ge nerally, when a group changes ~ eae the earliest name (or 
n 
siuat be regarded as valid, if it fe i in  sonforthity with the rules, 
unless there exist any of the obstacles indicated in the Articles of 
Section 7. 
Examples. The section Campanopis R. Br. Prodr. Fl. Nov 
Holl., p. 561 (1810) of the genus Campanula, was first raised to 
generic rank by Schrader, and must be called Wahlenbergia Schrad 
Cat. hort. Goett. (1814), not Campanopis O. Kuntze, Rev. Gen. ii. 
Hu 
p. 221 (1762) not Mentha vir tiie L. Sp. a ed. 2, p. 804 1768). — 
Lythrum intermedium Ledeb. (Ind. Hort. Dorp. [1822]), panne as 
a variety of L. Salicaria L., must be called L. Salicaria var. 
lius Turez. (in Bull. Soc. Nat. Moscou, xvii. 285 [1844] ), ‘sk s 
Salicaria var. intermedium Koehne (in Engl. Bot. Jahrb. i. 82 
[1881]). In all these cases names which are in accordance with 
the old law of Alphonse de Candolle must give place to older names 
and combinations. 
Recommenpations. Authors who make the changes discussed 
in Article 49 should note the following ore a in order 
to avoid a mr of name in case of a change of ra 
XXIX. 1. When a subtribe becomes a Bie when a tribe 
becomes a vaibhianly, when a subfamily becomes a family, &c., or 
when the inverse changes occur, tai bie alter the root of a name 
but only the sormuinaton (-in oidee@, -acea, -ine@, -ales, 
&c.), unless, in the wr. posiiitlig' one of the obstacles indicated 
in the Articles of Section 7, supervenes, or the new designation 
hasouie a source of error, or there is some other serious reason 
against fc 
3. a section or a subgenus becomes a genus, or the 
inverse sianos take place, pki the old names, unless this results 
in two genera of plants having the same name, or the existence of 
two subdivisions of the same name in the same genus, or one of the 
sige peoens in the Articles of Section 7 li enes 
. When a subdivision of species becomes a species or the 
‘ied anit pao retain the original epithets, unless this 
results in two species bearing the same name in the same genus, or 
‘two subdivisions bearing the same name in the same ms or 
unless any of the obstacles indicated in Section 7 superven 
Journal or Borany, 1906. [Suprnemenr II.] 
