| 3 
CODE OF BOTANICAL NOMENCLATURE 253 
(6) In the transfer of a species from one genus to another 
the original specific name is retained, unless the result- 
ing binomial has been previously published. 
EXAMPLES.—Bromus giganteus L. Sp. Pl. 77, is Festuca gigantea 
(L.) Vill. Hist Pl. Dauph. 2: 110 (1787); Arum tise L. = 
Pl. 965, is to be known as Arisaema triphyllum (L.) Torr. Fl. N, Y. 
239 (1843), not as AGE er atrorubens Blume, boughs 1: 97 (183 
Laurus Sassafras L. Sp. Pl. 371, is to be known as Sassafras Sassafras 
(L.) Karst. Deutsch. FI. - (1881), not as Sassafras officinale Nees & 
Eberm. Handb. Med.-pharm. Bot. 2: 418 (1831); however, Schoenus 
pusillus Sw. sete —— & Sp. Pl. 20 (1788), when transferred to Ryn- 
chospora, Rynchospora pusilla (Sw.) Griseb. Kar. 123 
(1857), beneuse prior to 1857 the same boowial had been used for an- 
other species, Rynchospora pusilla Chapm. (1849). 
(c) A subspecies elevated to specific rank retains the same 
name, unless the resulting binomial has been previously 
published. 
PS a 5 ee — 
EXAMPLES.—Sfarganium simplex androcladum Engelm. in A. 
| Gray, Man. ed. 5, 481 (1867), if regarded as a distinct species, becomes 
Sparganium androcladum (Engelm.) Morong, Bull. Torrey Club, 15 : 
| q 78 (1888) ; however, Juncus acuminatus robustus Engelm. Trans. Acad, 
} 
Sci. St. Louis, 2: 463 (1868), does not become Juncus robustus (Engelm. ) 
Coville in Britt. & Brown, Ill. Fl. 1: 395 (1896), because prior to 
1896 the binomial had been used for another species, Juncus robustus S. 
Wats. Proc. Am. Acad. 14: 302 (1879) 
Canon 10. A generic or subgeneric name is published when it has 
been printed and distributed (1) with a generic or specific 
description (or in palaeobotany a figure) and a binomial spe- 
cific name, (2) witha generic and specific name and the citation 
of a previously published description, or (3) with a reference 
to a specific description, which is associable by citation with 
a previously published binomial species. 
EXAMPLES, —Pachysandra Michx. Fl. Bor. Am. 2: 177 la is pub- 
lished with a generic and specific description and a binomial speci er 
Brasenia Schreb. ex Gmel. Syst. 2 : 853 (1791), is published with a generic de- 
scription and a binomial specific name ; Si/phium L. Sp. Pl. 919 ( 1753), is pub- 
Schloth. 
lished with a ongr pesgage and a binomial specific n name ; y Fpmeates 
the previously published ae lypodium Filix-mas L. Sp. Pi. (1753), inas- 
much as both Adanson and Linnaeus cite Fz/ix mas of F neg 
