* Heywood, V.H.; Brummitt, R.K.; Culham, A. [et al.]. ''Flowering Plant Families of the World''. Ontario, Canada: Firefly Books, 2007. ISBN 978-1-55407-206-4 | * Heywood, V.H.; Brummitt, R.K.; Culham, A. [et al.]. ''Flowering Plant Families of the World''. Ontario, Canada: Firefly Books, 2007. ISBN 978-1-55407-206-4 |