References

R. Koenig, C. W. A. Pleij, S. Loss,  W. Burgermeister, H. Aust, and J. Schiemann. 2004. Molecular Characterization of Potexviruses Isolated from Three Different Genera in the Family Cactaceae. Archives of Virology 5:903-914.

Anderson, Edward. 2001. The Cactus Family. Timber Press, Portland, Oregon, USA.

Reese, Carol. 2007/2008. Q& A.  Horticulture Volume 105 Issue 1, p12-15.

Spenser, W. 1984. Christmas Cactus Chameleon. Volume 31 Issue 1, p22.

Doubrava, N. 1999. Christmas Cactus. Clemson Extension. <URL:

http://www.clemson.edu/extension/hgic/plants/pdf/hgic1554.pdf>. Accessed 27 March 2009.

San Diego Natural History Museum. <URL: http://www.sdnhm.org> Accessed 11 April 2009.

Tree of Life Web Project. <URL: http://tolweb.org>. Accessed 07 April 2009.

UW-Madison Department of Botany. <URL: http://botit.botany.wisc.edu/courses/Systematics>. Accessed 08 April 2009.

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