411 REFERENCE · Wikibooks
Flora of New York/APW-ref
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
P. F. Stevens, (2001 onwards). "," Angiosperm Phylogeny Website. Version 13, September 28, 2013 (and more or less continuously updated since). http://www.mobot.org/MOBOT/research/APweb/orders/web.htm#.