Conostomium longitubum (Beck) Cufod. [ Oldenlandia rotata Baker]
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Conostomium longitubum (Beck) Cufod.
[Oldenlandia rotata Baker] [Rubiaceae]
H.G.A. Engler, O. Drude, Veg. Erde, vol. 9(2): : p. 188, fig. 160 (1908)