The following bibliography has been generated by bringing together all references provided by our content partners. There may be duplication.
- Bailey, L.H. & Bailey, E.Z. (1976) Hortus Third. A concise Dictionary of Plants Cultivated in the United States and Canada Macmillan Publishing Co, Inc., New York
- Die Natürlichen Pflanzenfamilien 1: 185. 1897. (4 Oct 1897) (Nat. Pflanzenfam.)
- in H. G. A. Engler & K. A. E. Prantl, Nat. Pflanzenfam. Nachtr. 1: 215. Oct 1897.
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