8CRONQUIST A. The evolution and classification of flowering plants. N.Y. 1988. http://herba. msu. ru/shipunov/else/cronqst. txt.
9Angiosperm Phylogeny Group. An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG Ⅱ. Botanical Journal of the Linnean Society ,2003,141 : 399-436. http://en.wikipedia. org/wiki/APG-Ⅱ-system.
10Florida Council of Bromeliad Societies. Bromeliad Encyclopedia. 2008. http://fcbs. org.