database: Cistaceae of North America Update; Updated by the Flora of North America Expertise Network, in connection with an update for USDA PLANTS (2007-2010)
website: Angiosperm Phylogeny Website, 2012; Angiosperm Phylogeny Website, botanical information system at the Missouri Botanical Garden, available at http://www.mobot.org/MOBOT/research/APweb/
database: NODC Taxonomic Code;
database: The PLANTS Database; National Plant Data Center, NRCS, USDA. Baton Rouge, LA 70874-4490 USA. http://plants.usda.gov
database: The PLANTS Database; National Plant Data Center, NRCS, USDA. Baton Rouge, LA 70874-4490 USA. http://plants.usda.gov
