by Timothy Plowman
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Pre-Columbian plant migration
Five new species of Brunfelsia from Sout...
A study of systematic wood anatomy in Ca...
New taxa of Erythroxylum (Erythroxylacea...
A revision of the South American species...
The identity of Amazonian and Trujillo c...
Beiträge zur Kenntniss der Gattung Eryth...
The botanical origin of coca leaves
El genero Erythroxylon en el Peru
La hoja increíble
Gas chromatographic analysis of cocaine ...
Structural variations in Erythroxylon le...