Editing Canna (plant) (section)

===Species===
{{Main|List of Canna species||l1=List of ''Canna'' species}}

Although most cannas grown these days are [[cultivars]] (see below), about 20 known species are of the wild form,{{clarify|reason=this is twice the number stated in the lead|date=March 2020}} and in the last three decades of the 20th century, ''Canna'' species have been categorized by two different [[taxonomists]], [[Paulus Johannes Maria Maas|Paul Maas]], from the [[Netherlands]]<ref name=Maas>[[Paulus Johannes Maria Maas|Paul Maas]] 1985. 195. Cannaceae. & Maas, P. J. M. and H. Maas. 1988. 223. Cannaceae.</ref> and [[Nobuyuki Tanaka]] from Japan.<ref name=Tanaka>[[Nobuyuki Tanaka|Tanaka, N.]] 2001. Taxonomic revision of the family Cannaceae in the New World and Asia. Makinoa ser. 2, 1:34–43.</ref> Both reduced the number of species from the 50–100 accepted previously, assigning most as [[List of Canna species|synonyms]].

This reduction in species is also confirmed by work done by Kress and Prince at the [[Smithsonian Institution]], but this only covers a subset of the species range.<ref>{{Cite web |url=http://www.botany2001.org/section12/abstracts/111.shtml |title=Species boundaries in Canna (Cannaceae): evidence from nuclear ITS DNA sequence data |access-date=2006-09-19 |archive-url=https://web.archive.org/web/20070312065416/http://www.botany2001.org/section12/abstracts/111.shtml |archive-date=2007-03-12 |url-status=dead }}</ref>