very lustrous, but its leaves are very much smaller and 
its inflorescence is very dissimilar. The flowers of Sene- 
feldera nitida are unknown, so it is not possible to eval- 
uate the relationship of this species with S. contracta; it 
is not unlikely that these two are rather closely allied. 
Senefeldera contracta, with fifteen stamens, is approached 
by S. dodecandra with twelve; but a number of vegeta- 
tive and floral characters indicate that no relationship 
exists between the two. 
CotomsiA: Comisaria del Amazonas, entre Leticia y El Marco. 
‘Virgin Forest. Tree 30 meters; trunk stout; flowers small.’? Au- 
gust 20, 1946, George A. Black & Richard Evans Schultes 46-36 (Typr 
in U.S. Nat. Herb. ). 
Senefeldera inclinata Mueller-Argoviensis ex Mar- 
tius Fl. Bras. 11, pt. 2 (1874) 530. 
The collection cited below appears vegetatively to 
match rather closely the type of Senefeldera inclinata 
which is a fruiting specimen from the region of the Casi- 
quiare. This species has apparently not hitherto been 
reported as an element of the flora of Colombia. 
Cotomsta : Comisaria del Amazonas, Rio Amazonas, Leticia. ‘‘Bush, 
34 m.; Flowers greenish-white.’? August 16, 1946, George A. Black 
& Richard Evans Schultes 46-4. 
SAPINDACEAE 
Paullinia Yoco R. Ll. Schultes & Killip ex Schultes 
in Bot. Mus. Leafl. Harvard Univ. 10 (1942) 302, t. 27. 
In 1942, world conditions prevented my consulting 
the specimens of yoco which were collected in Colombia 
in 1923 by the Belgian botanist Florent Claes. Mention 
was made (Schultes |.c. 309) of this material and the fact 
that De Wildeman (in Compt. Rend. 188 (1926) 1850) 
had identified yoco as Paullinia searlatina Radl. from 
this material. 
When I visited Belgium in 1950, I was fortunate in 
being able to examine Claes’ material, preserved in the 
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