50 212 



Niitt. (<7»-n. Amer. I, 222 [181S]) but wo oaiinot restoro tlie original ppitliet of lliis speries, althoiigh 

 tins lias been donc in tbe .Votizbl. des K. bot. Carteiis kiuI .Uks. lierl. II, :)18 (1899), becaiisi> thcii' 

 exists aiready a valid specios in tbe «jjcnus witli tlic iianio Oilochortus albus Dmii;]. iii Miinml 

 Botanht t. 98 (1839). 



Alt. 54. Naines of gênera inus;t lie rcjocted in tlic following special rase.s: 



1. Wlien tliey are fornicd froni a teciinical tenu borrowod froni mori)liology, 

 unless they are acconipanied l)y specific naiiios. 



2. When tliey express uninoniiiiai nomenclature. 



;i When tliey are fornied of two words, uidess tliosc twn \v()rd> wcre IVoin 

 tlie tirst united or joiiied i>y a liyphen. 



Kxaiii|il('s. — 1 ". (IcMUTic ii.-iuios sucb Af,/.ignu)n, A'm/i.v, Spina, otr. wuiilil mit imw lie ;iiliiii»ililc; 

 on tlic (ithcr band a {,'iMU>nc nanio like Tuber sliould not ho rejected wlu'n it lias liccn publislu'd 

 with specific namcs ('ruber cibarium etc.). — 2°. Ehrliart { Phyto phy lac htm [178(1] and Beitrag. 1\'. 

 11.') — 130) inade use of a uninominal nomenclature for species known at tliat time under binary 

 naines (Phaeoeephalum, Uptostachys, etc.). Tbese names, wliich resenible generic names, must not be 

 confused with such and are to be rejected, unless a sulise(pient author bas given theni tbe value of 

 a generic name: for exaini)le Baeothryon, a uninominal expression of Ehrbiu-t's, bas been applied to 

 a genus characterised by A. Dietricb Spec. PL II, S9 (IS.'îli). — 3". Names like Quisqualis (a single 

 Word fluni the first), Scbastiano-.Schaueria and Xc7>es-Armondia will stand. 



Art. 55. Specific names nuist also be rejected in the tolluwing special ca.ses: 

 1". When they are ordinals serving for purpo.se of enuineration. 

 2". When they niercly repeat the generic name. 



Exam])les. — 1 ". Boletus vicesiinus sextus, Agaricus octogesimus nonus. — 2 ". Linaria /.inaria, 

 Raphanistrum Baphanistrum (!tc. 



Art. ;')(). In the cases foreseeii in articles 51 to 5((. the iiaiiic to lie rcjectcil 

 or changed is replaced hy the oldest valid naine in the grou|i in (|iu'>tion. and in 

 default of such a one a new nante ninst lie maile. 



Examiiles: See tbe cxaiiiples rited niitler articles .")1 and 53. 



Art. 57. The original spelling of a name must be retaincd. except in case 

 of a typograiihic or orthographie error. AVhen the iliHerence between two names. 

 e.specially two generic nanie.s, lies in the terniination, thèse namcs are to be regarded 

 as distinct even thougli ditïering by one letter only. 



Exani))les: h'ubia and Kubus, Monochaete and Monochaetum, Peponia and Peponium, Iria 

 and Avi. 



Recommendations. 



XXX. Tlie lilierty of making ortbograpliic corrections must be used witb réserve, especially 

 if tbe change affects tbe first syllalile, and above ail the first letter of a name. 



XXXI. Many names differ by a single letter witboiit risk of confusion (ex. Dun'illea and 

 Urville<i). In cases where a close apiiroach to ideiUity is a source of error (ex. Astrostemma and 

 Asternstemmn in one and the saine family, Asckpiadaceae, Pleuripetalum and Plcuropetalum in Orchidaceae) 

 only one, tho older, of tho names sbould be kei)t, in accordance witb article 51, 4". 



Chapter I.V. .Modifient ion of (lie niles of holanical noiiieiiclalure. 



Art. 5K. 'l'Iie rules of liotanical nonicnclatiirc can mily lie nioditied by com- 

 pétent pcrsons at an international Congress convcned for the express purpose. 



