inhabited the upper Apaporis basin, now reduced to 
fewer than twenty individuals residing on the Rio Vaupés 
and at La Pedrera on the Rio Caqueta. The Karijonas 
refer to this plant as le-che-mah. 
Cotomapia: Comisaria del Vaupés, Macaya-Ajaju River confluence. 
Mount Chiribiquete. ‘‘Vine. Fruit green, with reddish tinge.’’ May 
15-16, 1943, Richard Evans Schultes 5452. 
Combretum rotundifolium L. C. Richard in Act. 
Soc. Hist. Nat. Paris 1 (1792) 108. 
In spite of its abundance in Amazonian Colombia, 
Combretum rotundifolium does not seem to have been 
reported from this Republic. Collections have also been 
made in Venezuela and the Guianas. 
CotomsiA: Comisaria del Vaupés, Macaya River, vicinity of Cachi- 
vera del Diablo and mouth of river. Altitude about 300 meters. 
‘*Flowers red. Vine.’? May 1943, Richard Evans Schultes 5501. 
APOCYNACEAE 
Ambelania cuneata Mueller-Argoviensis in Mar- 
tius Fl]. Bras. 6, pt. 1 (1868) 17. 
This represents apparently the second collection of 
Ambelania cuneata. The type was from the upper Rio 
Negro near the confluence of the Rios Guainia and 
Casiquiare. 
Cotompra: Comisaria del Vaupés, Rio Vaupés, Cafio Pact. Sandy 
6é“ ; ’ = 
or rocky savanna. Bush. Flowers yellowish.’’ March 6, 1944, 
R. BE. Schultes 5815. 
Ambelania zschokkeiformis Markgraf in No- 
tizbl. Bot. Gart. Berlin 12 (1985) 295. 
The two collections cited represent apparently the 
second and third collections of this species, which was 
described on the basis of material which Ducke found 
on the Mauésmirim, an affluent of the Rio Maués. The 
Marmellos material establishes the occurrence of A mbe- 
lania zschokheiformis in the great Rio Madeira basin and 
greatly amplifies the known range of the species. 
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