the anthers and suprastaminal column, the _ pistillate 
flower, the pistil and the ovary of ‘‘Siphonia brasiliensis 
W. (in herbariis).’” In accordance with Article 44 of the 
Rules, this constitutes valid publication, for the name 
of a species is validly published if it be accompanied ‘‘by 
a plate or figure with analyses showing essential charac- 
ters; but this applies only to plates or figures published 
before January 1, 1908.”’ 
When Mueller transferred the specific epithet from 
Siphonia to Hevea in 1865, he was probably unaware of 
the discrepancy between the Orinoco and the Amazon 
collections—and this in spite of Baillon’s insistence on 
that point in 1858. In making the new combination, 
Mueller based it on ‘‘Stphonia brasiliensis Kunth in 
Humb. et Bonpl. Nov. Gen. et Spec. 7, p. 171°” and 
cited “*S. Kunthiana Baill.’ as a synonym. It is signi- 
ficant, however, that the Brazilian material (‘‘In Brasilia 
paraénsi, Hoffmansegg in hb. Willd. fol. 17986. p. 1°’) 
was cited before the Venezuelan collections. It is because 
the author of this combination, apparently unaware of 
Jussieu’s paper, attributed the earliest publication to 
Kunth that the author citation of Hevea brasiliensis has 
been erroneously written as ‘‘(HBK.) Mueller-Argovi- 
ensis’’ by almost all taxonomists. 
In summary, we may say that the proper and valid 
name of the cultivated rubber tree is 
Hevea brasiliensis (Willd. ex Adr. de Juss.) 
Mueller-Argoviensis in Linnaea 84 (1865) 204. 
Its synonymy is as follows: 
Siphonia brasiliensis Willdenow ex Adr. de Jussieu 
Euphorb. Gen. (1824) t. 12, pl. 88b., fig. 1-6. Mon 
Siphonia brasiliensis HBK. Nov. Gen. et Sp. 7 (1825) 
wee 
Hevea janeirensis Mueller-Argoviensis in Martius F]. 
Bras. 11, pt. 2 (1874) 706. 
Hevea Sieberi Warburg Kautschukpf. (1900) 82, fig. 
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