Brazilian Species,’’ Ducke cited Hevea nitida as an in- 
sufficiently known species, stating, in part: ‘‘ Il compared 
a leaf of the type. ... [which] resembles, in the nearly 
equal colour of both surfaces, the leaves of HZ. viridis 
but [it] is more coriaceous and has a different form.”’ 
Mueller wrote in the original description that the leaflets 
are ‘‘subtus vix pallidiora’” and that the concept is 
‘‘evidenter affinis H. rigidifoliae et H. Brasiliensis, sed 
folia minus rigide coriacea quam in priore et margine 
haud recurva, distinctius venosa, et capsulae et semina 
multo minora quam in posteriore, a qua insuper colore 
foliorum recedit. ”” 
The type locality of Hevea nitida coincides with the 
region where the concept Hevea brasiliensis var. subcon- 
color is known to be rather widely distributed. 
After having studied individually thousands of trees 
of the variety of Hevea brasiliensis which occurs in the 
‘*trapecio amazonico’’—which have been determined 
both by Dr. Ducke and by myself as representing the 
concept AZ. brasiliensis var. subconcolor —1 am convinced 
that this variety is identical with the concept HZ. nitida. 
All the characters of Hevea nitida mentioned by Muel- 
ler in his ample description agree with those described 
by Ducke for his variety swbeoncolor. Consequently, I 
believe that it is advisable to reduce HZ. nitida to syn- 
onymy. Because of the International Rule requiring the 
use of the earliest name under the rank maintained, it 
is impossible to use the earlier epithet nzt7da as the vari- 
etal designation. 
Hevea Foxii Huber in Bol. Mus. Goeldi 7 (1918) 
228. 
Hevea Fowi, for which the common name “‘ituri’” has 
been reported, is avery poorly understood species known 
only from the type material which was collected at El 
[8 ] 
