- International Association for Plant Taxonomy
https://www.iapt-taxon.org/index_layer.php - American Society of Plant Taxonomists
https://www.aspt.net - Botanical Society of America
https://www.botany.org - The American Fern Society
https://www.amerfernsoc.org - Botanical Society of China 中國植物學會
https://www.botany.org.cn/CN/model/index.shtml - Taiwan Society of Plant Systematics
https://www.tsps.org.tw/reference.htm - The Systematics Association
https://www.systass.org - Biodiversity Information standards
https://www.tdwg.org