Sisyrinchium angustifolium

Blue-eyed grass
Scientific classification
Kingdom:	Plantae
(unranked):	Angiosperms
(unranked):	Monocots
Order:	Asparagales
Family:	Iridaceae
Subfamily:	Iridoideae
Tribe:	Sisyrinchieae
Genus:	Sisyrinchium
Species:	S. angustifolium
Binomial name
Sisyrinchium angustifolium Mill.

Sisyrinchium angustifolium, commonly known as Stout blue-eyed grass or simply blue-eyed grass, is a herbaceous perennial growing from rhizomes, native to moist meadow and open woodland. It is the most common blue-eyed grass of the eastern United States, and is also cultivated as an ornamental.

Range: Eastern Canada and US, west to Texas and Minnesota, in meadows, low woods, and shorelines.

Height: 15–50 centimetres (6–20 in). Stem: broadly winged, 2–4 millimetres (0.08–0.16 in) wide, usually branched. Leaves: 2–6 millimetres (0.08–0.24 in) wide. Tepals: 6, blue, 7–10 millimetres (0.3–0.4 in), each tipped with a sharp point, veined, and darkening toward central yellow patch.

Gallery

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  flowers, stem, & leaves

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  many, in grass

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  bud before flowering and immature fruits

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  flower, close

References

• Flora of North America
• Rhoads, Ann F., Timothy A. Block, and Anna Anisko (Illustrator). The Plants of Pennsylvania: An Illustrated Manual, Second edition (2007). University of Pennsylvania Press. ISBN 0-8122-4003-0
• Gleason, Henry A. and Cronquist, Arthur (1991) Manual of Vascular Plants of Northeastern United States and Adjacent Canada, Second Edition. The New York Botanical Garden Press. ISBN 0-89327-365-1.
• Thierer, John W., Niering, William A., and Olmstead, Nancy C. (2001) National Audubon Society Field Guide to North American Wildflowers, Eastern Region, Revised Edition. Alfred A. Knopf. ISBN 0-375-40232-2.