NOTES ON NEW AND OLD GENERA OF PLANTS 381 
MORINIA 
There is a Linnaean genus Morina which renders the Morinia 
Berl. and Bres. a homonym, for the reason mentioned in the 
preceeding paragraph. This latter may be changed to Rinomia. 
A synonym thereto may be seen in Pestalozzina Passer, but there 
is another Pestalozzina Sacc., also a Pestaloziella Sacc. & EIl., 
Pestalozia de Not. and a Pestalozzia Zoll. & Mor. (1846). 
Rinomia Nom. Nov. 
Morinia Berl. & Bres. not Morina Linn. 
Rinomia pestalozziodes (Berl. & Bres.). 
MYXONEMA 
Myxonema Freis (1825), presumed to be but a synonym of 
Stigeoclonium Kutz. (1843) has been taken up for the latter.* 
The Myxonema Corda is therefore of course a homonym. ‘This 
fact illustrates that when once a genus name has been used, ‘it 
is never safe to apply it to another plant on the plea that it is 
available because of invalidity of the first or its desuetude. ‘‘Once 
a synonym always a synonym,”’ is the only safe principle to apply 
to nomenclature if absoJute confusion is to be avoided. Pyonema, 
may be suggested to supplant Corda’s untenable name. 
Pyonema Nom. Nov. 
Myxonema Corda, not Myxonema Fries (1825). 
Pyonema assimile (Corda). 
Myxonema assimile Corda. 
NOLANEA 
Nolanea (Fries.) Sace is but another form of Nolana Linn. 
To replace it Lanolea may be applied for the fungus. 
Omphalia Fries is too much like Omphalea Linn. (1759). 
Phalomia may be used for the fungus plant. 
PECKIA 
Besides a Peckia Vell.” 1825 there is also a Peckiella Sace. and 
a Neo—Peckia Sace. The fungus name Peckza Clinton is antedated. 
Macilvainea may be used, in honor of Charles McIlvaine author 
of a popular work on American fungi. 
Macilvainea Nom. Nov. 
‘ West, G. S., Treatise of the British F. W. Algae, (1904). 
2 Vellosowyi, Hie Plums 5a ;le. TL. £, r34i035) (7825). 
