Template:Standley, 1931b

• Standley, P.C. 1931. The Rubiaceae of Ecuador. Publications of the Field Museum of Natural History, Botanical Series 7(2): 179–251. BHL  
  • Note: in this publication, some herbarium codes are different from those organized by Index Herbariorum, as follows (p. 180):
    • 'G' = GH
    • 'L' = LE
    • 'P' = PH
    • 'W' = US
    • 'Y' = NY
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