A genus of about 300-325 species, nearly cosmopolitan (most diverse in tropical and subtropical regions, and especially South America). This ‘technical’ genus is known well by only a few botanists, and additional undescribed taxa are possible.
Key adapted from Bridges & Orzell (2003), Godfrey & Wooten (1979), Kral (1966a), and Kral & Moffett (2009).
ID notes: In vegetative condition, Xyris is often confused with other monocots with equitant leaves, such as Iris (Iridaceae), Lachnanthes (Haemodoraceae), and Tofieldia, Triantha, and Pleea (Tofieldiaceae).
Ref: Anderson & Kral (2008); Bridges & Orzell (1987); Bridges & Orzell (1990); Bridges & Orzell (2003); Bridges & Orzell (2020b) In Weakley et al. (2020); Campbell (2011); Godfrey & Wooten (1979); Kral (1966a); Kral (1978b); Kral (1983b); Kral (1999); Kral (2000a) In Flora of North America Editorial Committee (2000); Kral & Moffett (2009); Kral In Kubitzki (1998b); Malme (1937); Ward (2007b). Show full citations.