Uruguay, and the northwestern tip of Argentina. 
C. amoenum seems to be an extreme in the morphological variation of C. triplinerve. 
However, the consistent correlation of narrow elliptic leaves, along with ampullaceous domatia, 
and tepals partially persistent in fruit found in C. amoenum, separates it clearly from the variable 
C. triplinerve that reaches the eastern edge of distribution range of that species. 
At the same time, the presence of appressed straight hairs on leaf lower surface, coupled 
with tepals mostly glabrous outside and partially persistent, and usually several pairs of 
ampullaceous domatia help to distinguish C. amoenum from other species in the area of 
southwestern Brazil. 
The situation in C. amoenum, that of two names given to the same species based on 
flowering and fruiting material respectively, is found very often in the taxonomic history of the 
Lauraceae. In this case, the difficulty in matching type material of Oreodaphne amoenum 
(flowers) with that of Oreodaphne vesiculosum (fruits) was increased by the morphological 
extremes that those collections represented. But with more collections at hand, it is easy to see 
the gradation and different combinations that distinctive characters, used in the original 
descriptions, have in the area where this species grows. Thus, it is evident that the ampullaceous 
projections of domatia on upper leaf surface are present whether the lower surface is dense 
glauco-pubescent or not; also, triplinerved leaves are not linked necessarily with a particular kind 
of pubescence or to the presence of ampullaceous domatia. 
In the original description of Oreodaphne amoena, Nees did not cite any particular 
collection by Sellow, but later, in his Systema Laurinarum (Nees, 1836), he gives Se/low 1459 
and 3/74, as the material studied for that species. The annotation found on number 3/74 
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