seringueira barriguda with a ‘‘conic’’ fruit. The speci- 
men was collected by M. Bonnechaux on the Rio Caurés, 
an afHuent of the middle Rio Negro below Barcellos. 
This species, two fruits of which were illustrated (Jumelle 
loc. cit., fig. 16), is, without any doubt, Hevea micro- 
phylla. Jumelle reported that it had a very small fruit 
with ‘‘papyraceous’’ valves ‘‘2 millimeters thick’? and 
seeds which are rather long and slightly triangular, 
measuring 14 mm. across at the base, 11 mm. at the 
point of attachment, and 25 mm. in length. This is, so 
far as I have been able to ascertain, the earliest report 
of Hevea microphylla. 
The type of Hevea microphylla, a fruiting specimen, 
was collected in 1902 on the Ilha de Xibarti near Sao 
Joaquim in the middle Rio Negro, slightly above the 
town of Barcellos. In 1905 (7), Ducke collected flowering 
material (the flowers of which were described by Huber 
as representing Hevea minor) near Barcellos. A quarter 
of a century later, in 1931, Ducke secured flowering 
material from the type locality. Until recently, these 
were the only collections of Hevea microphylla available. 
It seemed as though this species, which in a third of a 
century had been collected only a few times and in one 
very small area, represented one of the most highly re- 
stricted endemics of the genus. 
In May 19387, Mr. Charles H. T. Townsend, Jr., then 
director of the Ford plantations on the Rio Tapajéz, 
introduced Hevea microphylla into cultivation from the 
Rio Negro. There are, at the present time, four selec- 
tions of this species growing at the Belterra plantations. 
F'M 1516 and F'M 1517 were collected on an island in 
front of the settlement of Cumart, below Barcellos. 
This locality is the southernmost station known for the 
species. M1518 and I'M 1519 are selections from trees 
founc. along a creek back of Barcellos. All were prop- 
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