between about 2100 and 3400 meters, where typical spe- 
cies are S. brachybotrys, S. portachuelensis and S. putu- 
mayonis. Saurauia Alvaroi appears to be limited to an 
altitudinal band of perhaps 150 meters near the lowest 
range of the genus in this mountain chain. In spite of 
its limited altitudinal range, the species is well repre- 
sented in the forest. A large number of individuals, 
mostly not in flower, were studied along a very short 
stretch of the automobile road leading to the town of 
Mocoa. 
Saurauia Alvarot is named in honor of my Colombian 
colleague, Dr. Alvaro Fernandez Pérez, botanist, chem- 
ist and plant explorer, Curator of the Herbario Nacional 
Colombiano of the Instituto de Ciencias Naturales, Uni- 
versidad Nacional, Bogota, Colombia. Dr. Fernandez 
has advanced the cause of science in Colombia not only 
through his own extensive field work and research but 
also through willing and efficacious help to foreign bota- 
nists who visit Colombia for the purpose of studying its 
unequalled tropical flora. 
CotomsBiA: Comisaria del Putumayo. Road from San Francisco to 
Mocoa, at ten kilometers above Pepino Camp. Cloud forest. About 
2250 m. ‘“Tree up to 40 ft. tall. Leaves with basal flap. Flowers 
aromatic, white.’’ July 27, 1960, Richard Evans Schultes 22551 (Tyre 
in Herb. Gray; Dupticate tyre in Herb. Nac. Colomb.; Econ. Herb. 
Oakes Ames; Herb. Chicago). 
