INTERNATIONAL RULES FOR BOTANICAL NOMENCLATURE 19 
Rolfe.—5. The genus Schrebera L. derives its characters from the 
two genera Cuscuta and Myrica (parasite and host) ‘wil must be 
Article oa. The name a an gies suborder, family o 
subfamily, tribe or aE, ust be changed when it is taken i 
a aad which, by general consent, does not belong to the group in 
questio 
saa aple. If it were to be shown that the genus Portulaca 
does not belong to the family Por tulacacea, the name Portulacacee 
would have to be changed.—Nees (in Hooker and Arnott, Bot. 
a 
genus Melinis Beauy.). But Melinis (Tr istegis) having been excluded 
from this tribe by Stapf (in Fl. Cap. vii. 313) and by Hackel — 
Oesterr. bot. Zeitschr. li, 464), these authors have adel 
name Arundinellee from the genus Arundinella. 
Article 53. hen a subgenus, a section or a subsection, 
passes as such into another genus, the name must be changed if 
there is wpinenig in oe genus, a valid group of the same rank, 
under se an 
rank in that speci 
Examples. Sporiten ecg um Desf. (1798-1800) when trans- 
ferred by Spach in 1849 into the gen us C ytisus a not be ce 
The earliest synonym of Calvehortis Nuttallii Torr ~~ tray (in 
Pacific Rail. ree ii. 124 [1855-1856]) is Fritillaria alba Nutt. 
Gen, Amer, i. 222 (1818]); but we cannot restore the original 
epithet of this species, aig this has been done in the Notizbi. 
es Gartens und Mus. Berl. ii. 818 (1899), because there 
exists already a valid species in the genus bone the name Calochortus 
albus Dougl. in Maund, Botante, t. 98 (1839). 
Article 54. Names of genera must be rejected in the following 
os cases :— 
. When they are formed from a technical term borrowed from 
iis, unless they are accompanied by specific names. 
2. When they express uninominal nomenclature. 
8. When they are formed of two words, unless these two words 
were from the first united or joined by a hyphen. 
