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Xyris Linnaeus. Yellow-eyed-grass.

Key to Xyris

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.

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Hover over a shape, letter, icon, or arrow on the map to see what it means. Data for arrows not developed for genera and families which may have species only occurring outside the flora area.

image of plant© Gary P. Fleming | Xyris caroliniana | Original Image ⭷
image of plant© Keith Bradley | Xyris elliottii | Original Image ⭷
image of plant© Bruce A. Sorrie | Xyris platylepis | Original Image ⭷
image of plant© Jay Horn | Xyris platylepis source