BOTANICAL MUSEUM LEAFLETS 
HARVARD UNIVERSITY 
VoL. 18, No. 4 
CamsripGE, Massacuusretts, APRIL 4, 1958 
PLANTAE AUSTRO-AMERICANAE X 
AMERICAE AUSTRALIS PLANTAE NOVAE VEL ALIA 
RATIONE SIGNIFICANTES 
BY 
Ricuarp Evans SCHULTES 
One hundred years ago, Richard Spruce predicted that 
the northwestern parts of the Amazon Valley, especially 
that part lying in Colombia, would be found to be an 
area peculiarly rich in plants still unknown to science. 
Continued studies of collections made from this region 
during the past ten or fifteen years convince us of the 
soundness and wisdom of Spruce’s observation. 
The present paper, a miscellany of notes treating 
chiefly of new species and varieties, furthers a series di- 
rected towards our understanding of the flora of South 
America, with primary reference to the northwestern 
Amazonia. 
It is with appreciation that I acknowledge the collabo- 
ration of the following specialists: Dr. John Wurdack 
(Melastomaceae) and Dr. Bassett Maguire (Guttiferae) 
of the New York Botanical Garden; Dr. José Cuatre- 
casas (Paraprotium) and Dr. Richard S. Cowan (Callian- 
dra, Cassia, Inga, Jacqueshuberia, Macrolobium) of the 
Smithsonian Institution; Dr. John D. Dwyer (T'achi- 
galia) of St. Louis University; Dr. Harold N. Moldenke 
(Hriocaulon) of the Trailside Museum; and Dr. Robert 
W oodson (4 pocynaceae) of the Missouri Botanical Gar- 
den. I likewise thank Miss Ruth Barton for the careful 
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