Batsch, A.J.G.C. (1802), Tabula Affinitatum Regni Vegetabilis: 121 [tax. nov.]

Cronquist, A.J. (1981), An Integrated System of Classification of Flowering Plants: 1029-1242 [secondary reference]

Takhtajan, A.L. (1997), Diversity and Classification of Flowering Plants: 472-475 [secondary reference]

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