Template:Krause, 1908
- Krause, K. 1908. Rubiaceae andinae. In Urban, I. (ed.), Plantae novae andinae imprimis Weberbauerianae. III. Botanische Jahrbücher für Systematik, Pflanzengeschichte und Pflanzengeographie 40(3): 312–351. BHL
- [Publication date: 24 January 1908: see this page.]
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