where indeed it is very common and abundant within 
easy walking distance from Leticia, the magnificent V7c- 
toria regia has hitherto apparently never been collected 
in Colombian territory. It has been imported from Brazil 
and is established in a small pond at Ia Chorrera on the 
upper Rio Igaraparana, an affluent of the Rio Putumayo. 
It is interesting to note that the Spanish-speaking in- 
habitants of the trapécio amazénico know Victoria regia 
as horno, just as in Brazil it is called forno. The enor- 
mous, flat, round leaves resemble the flat, round baked- 
clay plates or hornos on which farina is toasted and cassabe 
is baked; this is the explanation of the curious common 
name. 
Cotompara : Intendencia del Amazonas, La Chorrera, Rio I[garaparana. 
*“Cultivated.’’? June 1942, Richard Evans Schultes 8970A.—Intenden- 
cia del Amazonas, Trapécio amaz6nico, near mouth of Rio Boiauasst, 
in swampy inlet of Rio Amazonas on Isla Zancudo, alt. about 100 m. 
“Leaves spiny beneath, 4-5 feet across. Flowers large, white, turning 
red or purplish. Horno.’’ October 1945, Richard Evans Schultes 6786. 
—Intendencia del Amazonas, Trapécio amazénico, Leticia. ““Beira do 
rio em terreno enxarcado, dentro da agua.’’ August 19, 1946, George 
A. Black & Richard Evans Schultes 46-18. 
RUTACEAE 
Leptothyrsa Sprucei Hooker filius in Bentham & 
Hooker filius Gen. Pl. 1 (1862) 284. 
This rare species, described from material collected by 
Spruce on the Rio Uaupés of Brazil, has apparently 
never been recorded from Colombia. 
Cotomp1a: Intendencia del Amazonas, |Trapécio amazonico]. **Pi- 
cada Cotuhé, varial aberto, beira de um corrego. Arbusto, 2 m.; flor 
branea.’’ November 8, 1946, George A. Black & Richard Evans Schultes 
46-364. 
EUPHORBIACEAE 
Cunuria crassipes Mueller-Argoviensis in Martius 
Fl. Bras. 11, pt. 2 (1874) 510. 
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