Hevea brasiliensis (W7//d. ev A. Juss.) Mueller- 
Argoviensis in Linnaea 84 (1865) 204. 
Siphonia brasiliensis Willdenow ex Adr. de Jussieu 
Kuphorb. Gen. (1824) t. 12, pl. 88b, fig. 1-6. 
The De Candolle Herbarium has two collections of 
this species, one of which is a fragment of the type. 
= 7 7 6é a . oe 
Brazit: Estado do Para, Rio Amazonas, © Para Hoffmannsegg. 
The Hoffmannsegg material of this concept, collected 
probably at the mouth of the Amazon by Sieber, is that 
on which the earliest publication of the binomial S7phonia 
brasiliensis and Willdenow’s accompanying diagnostic 
plate were based (cf. Schultes in Bot. Mus. Leafl. Har- 
vard Univ. 14 (1950) 79). The type is in the Willdenow 
Herbarium in Berlin; there is a duplicate type in Paris 
(Schultes le. Pl. xix). In an envelope on the sheet la- 
belled Hevea brasiliensis in the De Candolle Herbarium, 
there are two leaflets of this Sieber collection; the en- 
velope is marked, in) Mueller’s hand: ‘‘Folia: Para: 
Hoffmannsegg. 
’ , . . . ee 
Braziz: Estado do Paré, Rio Amazonas, “Para, Spruce, 1849. 
This second collection of Hevea brasiliensis consists of 
two complete leaves and several inflorescence axes in 
good flower. It is the widely distributed collection which 
Spruce made in the region of Belém do Para shortly after 
his arrival in South America in 1849; since, in Para, 
Hevea brasiliensis flowers in August and early Septem- 
ber, we may assume that this collection was one of the 
first which Spruce, who arrived in mid-July, 1849, made 
in South America. It can be considered topotypical: 
and, indeed, it matches the type extremely well. 
Mueller has written an annotation to the effect that this 
Spruce specimen was acquired ‘‘ex hb. Van Huerck.” 
The Van Huerck Herbarium is incorporated in the col- 
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