209 __ 47 



:i. In i';iM^s of prinality t'roni IIu'm' varions ]iciints of view ti) prefer thp more rorrort and 

 a]iiir(i]iriiit(' nanii". 



XXVII. Wlien several gênera are united as subgenera or sections under one generic 

 nanie, tliat siilidivision which was first distinguislied or described may retain its name (ex.: Anar- 

 rhinum sect. Anarrliinum\ Hemigenia sect. Hemigenia), or be preceded by a prefix {Anthriscus sect. 

 Eu-Antkrisais) or followed by a Suffix [Stachys sect. Stachyotyptis). These préfixes or suffixes lapse 

 wbcn tbi' subdivisions are- raised to generic rank. 



XXVIII. When several species are nnitod as sulisjiecies or varieties under a collective 

 naine, tbat subdivision which was first distinguislied or described may retain its name {ex.: Saxifragn 

 iispera subsp. aspera) or bear a prefix [Alchemilln alpi'na subsp. eualpma) or be designated by sonic 

 customary title (7iorinalfs, genuhms, typicus, originarius, vcriis, veridicus etc.). These préfixes or 

 terms lapse when the subdivisions are raised to specific rank. 



Art, 47. When a species or subtiivision of a species is divided info two 

 or more grou])s of the same nature, if one of the two forms was dist.inguished or 

 fiescrilied eailier than the other, the name is retained for that form. 



Examples. — Gcnhta horrida DC. FI. Franc. IV. 5(X) was divided by Spach (in Ann. Sei. Nnt. 

 ser. 3, IL, 253 [1844]) into three species: G. horrida DC, G. Boissieri S])ach and G. Webbii Spach; 

 the name G. horrida was rightly kept for the earliest described form, that described and figured by 

 Vabl and Gilibert. — Several species (Primula cashmiriana Munro, P. erosa Wall.) hâve been sepa- 

 rated from Primula dcnticulata Sm. (E.xot. Bot. II, 109, tab. 114), luit Üie name P. denticulata has 

 been rightly kept for the form which Smith described and figured under this name. 



Art. 48. When a subgenus or section or species is moved into another 

 genus, when a variety or other division of a species is moved into another species, 

 retaining there the same rani<. tlie original name of the subgenus or section, the first 

 specific epithet, or the original name of the division of the species must be retained 

 or must be re-established, unless, in the new position there exists one of the obstacles 

 indicated in the articles of section 7. 



Examples. — The subgenus Alfrcdia Less. (.-S^i'«. p. (i, 1832) of the genus Rhaponticum keeps 

 its name when placed in the genus Carduus: Carduus •à&vX. Alfrcdia Benth. et Hook. fil.; the section 

 Vaccaria DC. of the genus Saponaria keeps its nanic when placed in the genus Gypsophila: Gypso- 

 phila sect. Vaccaria Gren. et Godr. — Lotus siliquosus L. Syst. ed. 10. p. 1178 (1759) when trans- 

 ferred to the genus Tetragonolobus must be called Tetragonolobus siligttosus Roth Tent. FI. germ. I. 323 

 (1788) and not Tetragonolobus Scandalida Scop. FI. Carn. éd. 2, II, 87 (1772). — Betula incana L. 

 Suppl. p. 417 (1781) when transferred to the genus Alnus must be called Alnus incana Willd. Sp. 

 PI. IV, 33,5 (180.5), not Alnus lanuginosa Gilib. Exerc. Phytol. II, 402 (1792). — Satyrium nigrum 

 L. Sp. PI. éd. 1, 944 (1753), when placed in the genus Nigritella must be called Nigritella nigra 

 Reichb. f. le. FI. Germ. et Helv. XIV, 102 (1851), not Nigritella angustifolia Rieh, in Mém. Mus. 

 Par. IV, 56 (1818). The variety y micranthum Gren. et Godr. (FI. France, I, 171 [1847]) of 

 Helianthemum italicttin Pers., when transferred as a variety to H. penicillatum Thib. retains its name: 

 H.penicillatum var. a micranthum Grosser (in Engl. Pflanzenreich. Heft 14, p. 115 [1903]). — The variety 

 snbcarnosa Hook. fil. {Bot. Antarct. Voy. I, 5 [1847]) of Cardamine hirsuta L., when transferred as 

 a variety to C. glacialis DC, retains its name: C. glacialis var. subcarnosa 0. E. Schulz (in Engl. 

 Bot. Jahrb. XXXII, 542 [1903]); the citation of an earlier synonym (Cardamine propingua Carmichael 

 in Trans. Linn. Soc. XII, 507 [1818]) has no influence on the choice of the name of the variety 

 (see art. 49). In ail thèse cases, older but incorrect combinations must give jüace to more récent 

 combinations in which the rule has been observed. 



Art. 49. When a tribe becomes a family, a subgenus or a section becomes 

 a genus, a subdivision of a species becomes a species, or the reverse of thèse changes 



