- Images were either photographed by myself or were found on Wikipedia and are public domain

- Pizzetti and Cocker, Flowers: a Guide for your Garden, volume 1. Harry N. Abrams Inc Publishers, NY, 1975

- Valder, Peter, The Garden Plants of China. Weidenfeld and Nicolson, London. 1999

- Heywood, V. H., Flowering Plants of the World. Oxford University Press, NY. 1993

- Wikipedia... under search for Hibiscus

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