Flora of New York/APW-ref

[http://www.mobot.org/MOBOT/research/APweb/orders/web.htm# 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#.]