Sisyrinchium angustifolium

Narrow-leaf blue-eyed-grass
Conservation status
	; Secure (NatureServe)
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Monocots
Order:	Asparagales
Family:	Iridaceae
Genus:	Sisyrinchium
Species:	S. angustifolium
Binomial name
	Sisyrinchium angustifolium; Mill., 1768
Synonyms
	List Bermudiana angustifolia (Mill.) Kuntze (1891) ; Bermudiana bermudiana var. albida Kuntze (1898) ; Bermudiana bermudiana var. angustifolia (Mill.) Kuntze (1898) ; Sisyrinchium bermudiana subsp. angustifolium (Mill.) P.Fourn. (1935) ; Bermudiana graminea Gaertn. (1788) ; Bermudiana graminea (Lam.) Nieuwl. (1913) ; Bermudiana graminifolia Medik. (1787) ; Bermudiana homomalla (Klatt) Kuntze (1891) ; Bermudiana iridifolia Medik. (1787) ; Ferraria pulchella Salisb. (1796) ; Ferraria violacea Salisb. (1796) ; Marica mucronata Ker Gawl. (1827) ; Sisyrinchium acuminatum Herb. (1843) ; Sisyrinchium anceps Cav. (1788) ; Sisyrinchium bermudiana var. anceps (Cav.) A.Gray (1867) ; Sisyrinchium carolinianum E.P.Bicknell (1899) ; Sisyrinchium cultrifolium Noronha (1790) ; Sisyrinchium excisum Godr. (1853) ; Sisyrinchium gramineum Lam. (1785) ; Sisyrinchium graminoides E.P.Bicknell (1896) ; Sisyrinchium hibernicum Á.Löve & D.Löve (1961) ; Sisyrinchium homomallum Klatt (1882) ; Sisyrinchium iridioides Curtis (1789) ; Sisyrinchium membranaceum E.P.Bicknell (1899) ; Sisyrinchium nuttallii Sweet (1826) ; Sisyrinchium ramosum Herb. (1843) ; ;

Sisyrinchium angustifolium, commonly known as narrow-leaf blue-eyed-grass,^[3] is a herbaceous perennial growing from rhizomes, native to the eastern United States, stretching as far west as Texas and Kansas, where it is the most common blue-eyed grass. It is commonly cultivated as an ornamental.

Description

Height: 15–50 cm (6–20 in). Stem: broadly winged, 2–4 mm (1⁄16–3⁄16 in) wide, usually branched. Leaves: 2–6 mm (1⁄16–1⁄4 in) wide. Tepals: 6, blue,^[4] 7–10 mm (1⁄4–3⁄8 in), each tipped with a sharp point, veined, and darkening toward central yellow patch.

Ecology

Habitat

S. angustifolium is most commonly found in habitats such as woodlands, meadows, and sandhill swales.^[5]

This species possesses an intermediate shade tolerance and is adapted to both fine and medium textured soils.^[6]

Phenology

S. angustifolium tends to flower from January to May, with peak inflorescence occurring in the spring, around April.^[7]

Gallery

Many in a hedge
Flowers, stem, and leaves
Bud before flowering and immature fruits
flower, close
Mature fruits, having released the seeds

References

^ NatureServe (2024). "Sisyrinchium angustifolium". Arlington, Virginia. Retrieved 22 October 2024.
^ "Sisyrinchium angustifolium Mill". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 22 October 2024.
^ "Sisyrinchium angustifolium". Germplasm Resources Information Network. Agricultural Research Service, United States Department of Agriculture. Retrieved 1 July 2014.
^ Taylor, Ronald J. (1994) [1992]. Sagebrush Country: A Wildflower Sanctuary (rev. ed.). Missoula, MT: Mountain Press Pub. Co. p. 72. ISBN 0-87842-280-3. OCLC 25708726.
^ Weakley, A. S. (2015). Flora of the Southern and Mid-Atlantic States. Chapel Hill, NC, University of North Carolina Herbarium.
^ "USDA Plants Database". plants.usda.gov. Retrieved 2025-07-25.
^ Nelson, G. PanFlora: Plant data for the eastern United States with emphasis on the Southeastern Coastal Plains, Florida, and the Florida Panhandle. www.gilnelson.com/PanFlora/ Accessed: 29 MAY 2018

Cholewa, Anita F.; Henderson, Douglass M. (2002). "Sisyrinchium angustifolium". In Flora of North America Editorial Committee (ed.). Flora of North America North of Mexico (FNA). Vol. 26. New York and Oxford: Oxford University Press – via eFloras.org, Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
Rhoads, Ann F.; Block, Timothy A. (2007). The Plants of Pennsylvania: An Illustrated Manual. Anna Anisko (Illustrator) (2nd ed.). University of Pennsylvania Press. ISBN 978-0-8122-4003-0.
Gleason, Henry A.; Cronquist, Arthur (1991). Manual of Vascular Plants of Northeastern United States and Adjacent Canada (2nd ed.). The New York Botanical Garden Press. ISBN 0-89327-365-1.
Thierer, John W.; Niering, William A.; Olmstead, Nancy C. (2001). National Audubon Society Field Guide to North American Wildflowers, Eastern Region (Revised ed.). Alfred A. Knopf. ISBN 0-375-40232-2.

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[NatureServe-1] NatureServe (2024). "Sisyrinchium angustifolium". Arlington, Virginia. Retrieved 22 October 2024.

[POWO-2] "Sisyrinchium angustifolium Mill". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 22 October 2024.

[3] "Sisyrinchium angustifolium". Germplasm Resources Information Network. Agricultural Research Service, United States Department of Agriculture. Retrieved 1 July 2014.

[4] Taylor, Ronald J. (1994) [1992]. Sagebrush Country: A Wildflower Sanctuary (rev. ed.). Missoula, MT: Mountain Press Pub. Co. p. 72. ISBN 0-87842-280-3. OCLC 25708726.

[5] Weakley, A. S. (2015). Flora of the Southern and Mid-Atlantic States. Chapel Hill, NC, University of North Carolina Herbarium.

[6] "USDA Plants Database". plants.usda.gov. Retrieved 2025-07-25.

[7] Nelson, G. PanFlora: Plant data for the eastern United States with emphasis on the Southeastern Coastal Plains, Florida, and the Florida Panhandle. www.gilnelson.com/PanFlora/ Accessed: 29 MAY 2018

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