174 AMERICAN CopDE OF BoTANICAL NOMENCLATURE 
is typified by S. officinalis, the species indigenous from thé standpoint of 
__ the author. 
(e) The types of genera adopted through citations of nonbi- 
nomial literature (with or without change of name), are 
to be selected from those of the original species which 
receive names in the first binomial publication. The 
genera of Linnaeus’ Species Plantarum (1753) are to be 
typified through the citations given in his Genera Plan- 
gs ene 754). 
E. — The Auge Plantarum contains no generic references, but 
the On ithe of the Genera Plantarum was evidently prepared at the 
same time and was in effect a Limtidanaed volume of the same work, It 
accords much mere nearly than other editions with the treatment followed in 
the Species Plantarum, and thus makes it ete to retain more of the 
Linnaean ti names in their current applicatio 
Exa — Cypripedium VL. Sp. Pl. 951, a genus adopted fro 
der, zi a change of his name Ca/ceolus, is typified by Cy, anid 
Calceolus, the ouly species common to both authors; Sese/i L. Sp. Pl. 259, 
a genus adopted from Boerhaave, is typified by the second species of 
Linnaeus, Sese/i montanum, which is the first in Linnaeus of the species 
common to both authors; Silene L. Sp. Pl. 416, a genus adopted from 
Dillenius with a change of his name Viscago, is typified by Si/ene anglica, 
the first in Linnaeus of the thirteen en figured by Dillenius; /7éz/- 
faria L. Sp. Pl. 3 io a gg adopted from Tournefort, is typified by the 
fifth species of Linnaeus, Friti//aria Sr nae which is one of the three 
species included in Pritillaria by both authors, and is selected from these 
three because it is the one figured by eueavtark: 
Section V. Rejection of Names. 
Canon 16. A name is rejected when preoccupied (homonym). 
(a) A specific name is a homonym when it has been pub- 
lished for another species under the same meer name. 
EXAMPLES. — Acer saccharinum Wang 2, 20 
(1787), is a homonym of Acer saccharinum L. PL an See Vae- 
cinium myrtilloides Hook. Fl. Bor. Am, 2: 32 (1834), is a homonym of 
Vaccinium myrtilloides Michx. F1, Bor. Am. 1: 234 (1803), and is rejected 
whether the latter species is regarded as distinct or not; Chrysopsis pilosa 
( Walt.) Britton, Mem. agele no 5: 316 (1894), is a homonym of 
Chrysopsis pilosa Nutt. Jour. d. Nat. Sci, Phila, 7: 66 (1834), and is 
to be rejected, twining the fact that Zrigeron pilosum Walt. was 
published in 1 
(4) A generic name is a homonym when previously published 
for another genus. 
EXAMPLES. — Zorreya Arn. Ann, Nat. Hist. 1: 130 (1838), is a 
homonym of Zorreya Raf. Am. Mo. Mag. 3: 356 (1818), of Zorreya 
