| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|---|---|---|---|---|
| Iridaceae | Sisyrinchium albidum | White Blue-eyed-grass | Woodlands, mesic longleaf pine sandhills, open limestone barrens, prairies. | S. NY west to s. WI, south to Panhandle FL and e. TX. |  |
| Iridaceae | Sisyrinchium angustifolium | Common Blue-eyed-grass, Narrow-leaved Blue-eyed-grass, Stout Blue-eyed-grass | Woodlands, forests, meadows, longleaf pine sandhill swales. | VT, NH, and s. ON west to WI, e. KS, and OH, south to GA, AL, LA, and e. TX. |  |
| Iridaceae | Sisyrinchium arenicola | Sandyland Blue-eyed-grass | Pine-oak/heath woodlands and barrens, other sandy habitats. | A Coastal Plain endemic: MA to e. MD (Caroline Co.) (Knapp et al. 2011). | |
| Iridaceae | Sisyrinchium atlanticum | Atlantic Blue-eyed-grass, Eastern Blue-eyed Grass | Dry, sandy or rocky places, moist meadows, bogs, pine savannas, streambanks. | NS and ME west to OH, IN, and MO, south to s. FL and e. TX. |  |
| Iridaceae | Sisyrinchium biforme | Wiry Blue-eyed-grass | Dunes, prairies, other sandy soils. | E. LA west to s. and c. TX and south into Mexico (TAM). |  |
| Iridaceae | Sisyrinchium calciphilum | Glade Blue-eyed-grass, Alabama Blue-eyed-grass, Limestone Blue-eyed-grass | Calcareous glades. | Endemic to n. AL. |  |
| Iridaceae | Sisyrinchium campestre | Prairie Blue-eyed-grass | Prairies, especially in sandy soils. | MI and SD south to MS and NM. |  |
| Iridaceae | Sisyrinchium capillare | Wiry Blue-eyed-grass | Wet pine savannas and flatwoods, acid seepages in the lower Piedmont. | Mainly Coastal Plain, from se. VA south to ne. FL. |  |
| Iridaceae | Sisyrinchium corymbosum | Pinelands. | Se. GA and ne. FL west to s. AL. | ||
| Iridaceae | Sisyrinchium dichotomum | White Irisette, Isothermal Irisette | Dry to mesic woodlands and forests, usually over mafic rocks (such as amphibolite), at low to moderate elevations (400-1000 m) in the Blue Ridge escarpment. | Endemic to Henderson, Polk, and Rutherford counties, NC, and Greenville County, SC. |  |
| Iridaceae | Sisyrinchium elizabethiae | Elizabeth's Blue-eyed-grass | Dry woodlands and forests over deep sandy soils. | E. TX & w. LA. |  |
| Iridaceae | Sisyrinchium ensigerum | Swordleaf Blue-eyed-grass | Prairies. | OK south to c. TX and Mexico. |  |
| Iridaceae | Sisyrinchium fuscatum | Coastal Plain Blue-eyed-grass | Xeric to dry soils of pine barrens, Carolina bay rims, longleaf pine sandhills, fluvial sand ridges. | E. VA south to n. FL, west to LA. |  |
| Iridaceae | Sisyrinchium helleri | Heller's Blue-eyed-grass | Calcareous coastal prairies and adjacent roadsides. | Endemic in se. to s. TX. | |
| Iridaceae | Sisyrinchium langloisii | Pale Blue-eyed-grass | Sandy woodlands. | AR and OK south to w. LA and s. TX; allegedly disjunct eastward in AL, GA, MS, TN, and nw. GA, but some of these records at least are suspect. |  |
| Iridaceae | Sisyrinchium miamiense | Miami Blue-eyed-grass | Moist disturbed areas. | Ne. FL, s. GA, and se. SC south to s. FL and west to s. MS; West Indies. |  |
| Iridaceae | Sisyrinchium micranthum | Lawn Blue-eyed-grass, Fairy Stars, Annual Blue-eyed-grass | Lawns, roadsides, prairies, pinelands. | Apparently introduced from South America (se. VA south to s. FL, west to e. TX). |  |
| Iridaceae | Sisyrinchium minus | Least Blue-eyed-grass | Floodplains, mudflats, ditches, oak flatwoods, oak savannas, prairies. | E. LA, n. LA, se. AR, west to c. TX and n. Mexico; disjunct in sw. AL (Black Belt) and reportedly MS. The AL occurrences are reported and discussed by England & Keener (2017). Reported for NC (Sida 1962) and MS {check}. |  |
| Iridaceae | Sisyrinchium montanum var. crebrum | {habitat in our area not known}. | NL (Newfoundland) and ON south to NY and n. NJ. |  | |
| Iridaceae | Sisyrinchium montanum var. montanum | Forests, fields. | NL west to AK, south to NJ, PA, WV, n. OH, nw. IN, ne. IL, nc. OK, NM. Reported for n. WV (Harmon, Ford-Werntz, & Grafton 2006). |  | |
| Iridaceae | Sisyrinchium mucronatum | Needle-tip Blue-eyed-grass | Forests, woodlands, fields. | ME west to SK, south to SC, GA, TN, MI, and MN. |  |
| Iridaceae | Sisyrinchium myrioflorum | Deep sandy soils on the South Texas Sandsheet and closely adjacent. | S. TX. |  | |
| Iridaceae | Sisyrinchium nashii | Nash's Blue-eyed-grass | Dryish woodlands and forests, longleaf pine sandhills, pine rocklands, scrubby flatwoods. | NC and TN (and sw. VA?) south to s. FL and MS. |  |
| Iridaceae | Sisyrinchium pruinosum | Prairies and calcareous glades and barrens. | AR south to w. LA and AR; disjunct at scattered localities eastward in e. LA, MS, AL, and sc. TN. |  | |
| Iridaceae | Sisyrinchium rufipes | Xeric-dry longleaf pine sandhills, fluvial sand ridges. | Se. NC to n. FL, west to s. AL. |  | |
| Iridaceae | Sisyrinchium sagittiferum | Spear-bract Blue-eyed-grass | Low wet areas. | S. AR and s. OK south to e. LA, w. LA, and e. TX. Supposedly ranges east to AL (FNA), these reports regarded as unsubstantiated (D. Spaulding, 2013, pers. comm.). |  |
| Iridaceae | Sisyrinchium species 1 [Buck Creek] | Buck Creek Blue-eyed-grass | Serpentine barrens. | Endemic as far as is known to the Buck Creek Serpentine Barren, Clay County, NC. |  |
| Iridaceae | Sisyrinchium species 2 [chalk] | Chalk Belt Blue-eyed-grass | Limestone outcrops and other calcareous woodlands, Jackson prairies | Coastal Plain of GA, AL, and MS. | |
| Iridaceae | Sisyrinchium species 3 | ||||
| Iridaceae | Sisyrinchium texanum | Texas Blue-eyed-grass | Sandy or loamy coastal prairies, fields, grassy bayous, and adjacent roadsides. | Se. TX. |  |
| Iridaceae | Sisyrinchium varians | Variable Blue-eyed-grass | Calcareous woodlands, prairies, and adjacent roadsides usually closely adjacent to rocky or gravelly outcroppings. | Endemic in se. TX. | |
| Iridaceae | Sisyrinchium xerophyllum | Florida Blue-eyed-grass | Florida scrub and other xeric sandy sites. | S. GA (?) south to s. peninsular FL; also alleged to occur in NC (FNA) but this report does not seem plausible. |  |
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