1907] On the Vienna Rules of Nomenclature 55 
Halenia Borkh. (1796) 
Calystegia R. Br. (1810) 
Ellisia L. (1763) 
Amsinckia Lehm. (1831) 
Mertensia Roth. (1797) 
Pyenanthemum L. C. Rich. (1803) 
Nicandra Adans. (1763) 
Epiphegus Nutt. (1818) 
Fedia Moench (1794) 
Echinocystis Torr. & Gray (1840) 
Vernonia Schreb. (1791) 
Mikania Willd. (1803-1804) 
Liatris Schreb. (1791) 
Chrysopsis Ell. (1824) 
Haplopappus Cass. (1828) 
Silybum Adans. (1763) 
Cnicus Gaertn.’ (1791) 
Krigia Schreb. (1791) 
Taraxacum Wiggers (1780) 
Tetragonanthus 8. G. Gmel. (1769) 
Volvulus Med k. 1791) 
Macrocalyx Trew (1761) 
Benthamia Lindl. (1830) 
Pneumaria Hill (1764) 
Furera Adans. (1763) 
Koellia Moench (1794) 
Pentagonia Heist. ex Fabr. (1759) 
Physaloides Boehm. (1760) 
Leptamnium Raf. (1818) 
Mitrophora Neck. (1790) 
Micrampelis Raf. (1808) 
Behen Hill (1762) 
Willugbaeya Neck. (1790) 
Carelia Cav. (1802) 
Laciniaria Hill (1762) 
Psilosanthus Neck. (1790) 
Diplogon Raf. (1818) 
Hoorebeckia Cornelissen (1817) 
Mariana Hill (1762) 
Carbenia Adans. (1763) 
Adopogon Neck. (1790) 
Hedypnois Scop. (1772) 
[1 It should be noticed that this ruling is to the effect that the name Cnicus, employed 
by Linnaeus for a considerable aggregate, should be restricted, as by Gaertner, to 
Cnicus benedictus and any plants regarded as congeneric with it. As a result our ordi- 
nary thistles with plumose pappus may bear the name Cirsium Adans., and the species 
with simple pappus the name Carduus L. 
The degree to which the latter groups may 
be regarded as separate genera is of course still a matter of individual opinion.— Ed.] 
