Xyris curtissii

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Xyris difformis
Xyris difformis WF.jpg
Photo by Robert L. Stone hosted at Wildflowers.org
Scientific classification
Kingdom: Plantae
Division: Magnoliophyta - Flowering plants
Class: Liliopsida - Moncots
Order: Commelinales
Family: Xyridaceae
Genus: Xyris
Species: X. curtissii
Binomial name
Xyris curtissii
Natural range of Xyris curtissii from USDA NRCS Plants Database.

Common Name: Curtiss's yellow-eyed grass[1][2]

Taxonomic Notes

Synonyms: X. difformis Chapman var. curtissii; X. bayardii; X. neglecta;[1][2] X. papillosa[2]


Xyris curtissii is a monoecious perennial forb/herb.[2] However there is some suggestions that X. curtissii by be annual in northern portions of its range while individuals in the southern parts are biennial or perennial.[3] It has linear leaves 5-10 cm long and 2-4 mm wide and its sheath occupies 1/3 to 1/2 the length of the straw-colored tawny leaves. Seeds are ellipsoid and around 0.4 mm long.[4]


This species occurs from southeastern Virginia, south to northeastern Florida and westward to southern Arkansas and east-central Texas. Disjunct populations are found in southern New Jersey and Central America.[1]



W. curtissii occurs on savannas[1] containing moist or wet soils,[3] including wet depression prairies.[5] It is also found in moist pine woods.[4]


In the southeastern and mid-Atlantic United States, flowering occurs from July through August.[1]

Conservation and Management

Cultivation and restoration

Photo Gallery

References and notes

  1. 1.0 1.1 1.2 1.3 1.4 Weakley AS (2015) Flora of the Southern and Mid-Atlantic States. Chapel Hill, NC: University of North Carolina Herbarium.
  2. 2.0 2.1 2.2 2.3 USDA NRCS (2016) The PLANTS Database (http://plants.usda.gov, 07 February 2018). National Plant Data Team, Greensboro, NC 27401-4901 USA.
  3. 3.0 3.1 Kral R (1960) The genus Xyris in Florida. Rhodora 62(743):295-319.
  4. 4.0 4.1 Malme GOK (1937) Xyridacea. North American Flora 19(1):3-15.
  5. Carr SC, Robertson KM, Peet RK (2010) A vegetation classification of fire-dependent pinelands of Florida. Castanea 75(2):153-189.