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1) Majesty II, Weissich. P, The Outdoor Circle (1991)

2) National Tropical Botanical Gardens, "Meet the Plants", "Choose a Plant", www.NTGB.org, (2016)

3) Kew Royal Botanical Gardens, "Kew Science", kew.org.

4) Useful Tropical Plants, tropical.theferns.info, (2014)

5) Rauch. F, Weissich. P, Plants for Tropical Landscape: A Gardner's Guide. (2000)

6) Wakeman. J, Hawai'i's Trees: Sublime Beauty. (2008)

7) Majesty I, Parry. J, The Outdoor Circle (1982)

8) Elevitch. C, Traditional Trees of Pacific Islands: Their culture, environment, and use. (2006)

9) New Zealand Plant Conservation Network, nzpcn.org.nz. (2016)

10) Royal Horticulture Society, rhs.org.uk. (2016)

11) Encyclopedia of Life, eol.org. (2016)