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Sisyrinchium angustifolium P. Miller. Common Blue-eyed-grass, Narrow-leaved Blue-eyed-grass, Stout Blue-eyed-grass. Phen: Mar-Jul; Apr-Jul. Hab: Woodlands, forests, meadows, longleaf pine sandhill swales. Dist: VT, NH, and s. ON west to WI, e. KS, and OH, south to GA, AL, LA, and e. TX.

ID notes: Sisyrinchium angustifolium "is the most widespread Sisyrinchium in North America. It has broad (> 2 mm wide) branched stems with distinct wings and lacks fibrous remains of old leaves at the plant base. Its flowers are usually blue, rarely white. A similar wide-stemmed blue-eyed grass, Sisyrinchium nashii, differs by having fibrous bristles at the base. Herbarium specimens of the two species are easily identified by their foliage color; Sisyrinchium nashii dries yellowish-green or light olive green, whereas S. angustifolium usually is dark olive green to bronze." (Spaulding et al. 2023).

Origin/Endemic status: Native

Synonymy: = Ar, C, ETx1, F, FNA26, GW1, Il, K1, K3, K4, Mi, Mo1, NcTx, NE, NY, Pa, RAB, Tn, Tx, Va, W, WV, Hornberger (1991); = Sisyrinchium graminoides E.P.Bicknell – G, S, Tat; > Sisyrinchium angustifolium Mill. – S13; > Sisyrinchium graminoides E.P.Bicknell – S13; > Sisyrinchium membranaceum E.P.Bicknell – S13; > Sisyrinchium tenellum E.P.Bicknell – S13

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Wetland Indicator Status:

  • Atlantic and Gulf Coastal Plain: FACW (taxonomic split from wetland indicator species)
  • Eastern Mountains and Piedmont: FACW (taxonomic split from wetland indicator species)
  • Great Plains: FACW (taxonomic split from wetland indicator species)
  • Midwest: FAC (taxonomic split from wetland indicator species)
  • Northcentral & Northeast: FAC (taxonomic split from wetland indicator species)

Heliophily ?: 7

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image of plant© Gary P. Fleming | Original Image ⭷
image of plant© Erik Danielson source | Original Image ⭷
image of plant© Bruce A. Sorrie | Original Image ⭷
image of plant© Jim Fowler | Original Image ⭷
image of plant© Kristie Gianopulos CC0 | Original Image ⭷
image of plant© Erik Danielson source | Original Image ⭷

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