Combretum laxum appears to be an aggregate species 
in which several clearly distinct ‘‘tendencies’’ can be 
seen. As now understood in this broad sense, the species 
occurs all over tropical America. Several collections from 
the Departamento de Loreto, Peru, represent the same 
variant as Schultes 3924 from adjacent Colombia. When 
further material is studied, this variant can probably be 
shown to be specifically distinct from true Combretum 
laxum. 
In the Igaraparana, the Witoto Indian name of Com- 
bretum lawum is qjuo-wo. In another Witoto dialect from 
Loreto, Peru, the native name has been recorded as 
aioho-ayo-o (in Field Mus. Publ. Bot. 18, pt. 4 (1941) 225). 
This attractive vine often covers riverside vegetation 
and, especially at night, gives off an extraordinarily 
strong and sweet perfume. 
Cotompra: Comisaria del Amazonas, Rio Igaraparana, alrededores 
de La Chorrera. “‘Vine. Flowers yellow, fragrant.’’ June 4-10, 
1942, Richard Evans Schultes 3924. 
MELASTOMACEAE 
Aciotis aequatorialis Cogniaux in Martius FI. 
Bras. 14, pt. 8 (1885) 464. 
Known from the Pacific coast of Colombia, from An- 
tioquia and from the Intendencia del Meta, Aciotis ae- 
quatorialis has hitherto apparently not been reported as 
an element of the flora of Amazonian Colombia. A ciotes 
polystachys (Bonpl.) Tr. and A. purpurascens (Aubl.) 
Tr. have been collected in Colombia only a few kilo- 
meters from the locality of the specimen of 4. aequa- 
torialis cited below. 
CoLomspia: Intendencia del Amazonas, Rio Hamacayacu, April, 
1944, Frederick J. Hermann 11303. 
Leandra divaricata (Naud.) Cogniaux in Martius 
Fl. Bras. 14, pt. 4 (1886) 196. 
[ 40 | 
