Cronquist, A. 1988: The evolution and classification of flowering plants. New York, The New York Botanic Gardens.
NZFLORA February 2012
The Global Biodiversity Information Facility:
GBIF Backbone Taxonomy, 2013-07-01.
Accessed via http://www.gbif.org/species/49 on 2015-02-27
This backbone name usage exists because it was found in another checklist at the time the backbone was built. The primary source name usage has since been removed from the portal.