Family | Scientific Name | Common Name | Habitat | Distribution | Image |
Linaceae | Linum alatum | Winged Flax | Open, sandy areas. | Se. and s. TX (and w. LA?) and Mexico (ne. TAM); allegedly disjunct in sc. OK. | |
Linaceae | Linum arenicola | Sand Flax | Pine rocklands, marl prairies, disturbed areas over limestone. | Endemic to s. peninsular FL (Miami-Dade and Monroe counties). | 
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Linaceae | Linum berlandieri var. berlandieri | Berlandier's Yellow Flax | Sandy or gravelly prairies. | NE south through KS and e. CO to sw. LA, TX, e. NM, and Mexico. | 
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Linaceae | Linum berlandieri var. filifolium | | Sandy, rocky, or calcareous soils. | S. TX, w. Txand se. NM south into Mexico. | 
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Linaceae | Linum bienne | Blue Flax | Cultivated, rarely escaped to disturbed areas; also ballast. | Native of Mediterranean Europe. | 
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Linaceae | Linum carteri | Carter’s Flax, Everglades Flax | Pine rocklands. | Endemic to s. peninsular FL (Miami-Dade County). | |
Linaceae | Linum catharticum | White Flax, Fairy Flax | Ballast waifs (in our region). | Native of Europe. | 
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Linaceae | Linum curtissii | Texas Yellow Flax | Woodlands, other dry to moist places. | S. ME, MI, and n. IL south to s. FL and TX; West Indies. | 
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Linaceae | Linum elongatum | | | | |
Linaceae | Linum floridanum var. chrysocarpum | Yellow-fruited Yellow Flax | Very wet loamy pine savannas. | Se. NC south to s. FL and west to s. MS. | 
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Linaceae | Linum floridanum var. floridanum | Florida Yellow Flax | Wet pine savannas, sandhill seeps. | E. VA south to s. FL and west to LA and e. TX, essentially limited to the Coastal Plain; West Indies (Jamaica). | 
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Linaceae | Linum grandiflorum | Red Flax | Disturbed areas. | Native of n. Africa. | 
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Linaceae | Linum harperi | Harper's Grooved Flax | Dry to mesic longleaf pine savannas and flatwoods. | FL Panhandle, s. GA, and s. AL. The last apparent collection of this taxon was collected from Conecuh Co., AL (A.R. Diamond 13442) in 2002. Specimens from GA (R. Harper) are likely historical, but Godfrey's and Anderson's specimens may point to current extant populations of L. harperi (L. sulcatum var. harperi at varietal rank). | 
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Linaceae | Linum hudsonioides | Texas Flax | Sandy or gravelly prairies. | KS south to s. TX and NM. | |
Linaceae | Linum imbricatum | Tufted Flax | Sandy or rocky areas. | Sc. OK south through c. and ec. TX to s. TX. | |
Linaceae | Linum intercursum | Bicknell's Yellow Flax, Sandplain Flax | Woodlands, other dry to moist places. | MA south to c. TN, nw. GA, and c. AL; from MA to MD, nearly restricted to the Coastal Plain, in VA, NC, SC, GA, AL, and se. TN, however it is primarily on the Piedmont and Mountains. It also occurs disjunctly in n. IN near the Great Lakes. | 
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Linaceae | Linum lewisii var. lewisii | Prairie Flax | Calcareous glades and barrens. | NU west to AK, south to MI, nw. AR, ne. TX, NM, AZ, CA, and n. Mexico; disjunct at Smoke Hole Caverns, WV, and several adjacent counties. | 
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Linaceae | Linum lundellii | | Sandy loam in arroyos, gravelly hillsides, mesquite scrub woodlands. | S. TX south to NLE and TAM. | |
Linaceae | Linum macrocarpum | Spring Hill Flax | Pitcher plant bogs, wet savannas. | FL Panhandle west through s. AL and s. MS to se. LA. | 
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Linaceae | Linum medium | Stiff Yellow Flax | Lake (sand) plains. | ON and (reportedly) nw. PA (Presque Isle). | 
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Linaceae | Linum perenne | Perennial Flax | Disturbed areas. | Native of Europe. Cultivated and "rarely naturalized along roadsides" in scattered locations in PA (Rhoads & Klein 1993; Rhoads & Block 2007) and reported tentatively for VA (Kartesz 1999). | 
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Linaceae | Linum pratense | Meadow Flax | Rocky limestone or sandy prairies. | KS and CO south to c. TX, s, NM, s. AZ, and Mexico (AGS). | 
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Linaceae | Linum rigidum var. rigidum | Large-flowered Flax | Rocky or sandy prairies, rarely calcareous prairies, open woodlands. | MN, MB, SK, and AB south to OK, nc. TX, and NM. | 
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Linaceae | Linum rupestre | Rock Flax | Limestone outcrops. | Nc. TX and c. NM south to s. TX and s. Mexico. | 
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Linaceae | Linum smallii | Small’s Flax | Marl prairies and pine rocklands. | Endemic to s. peninsular FL. | 
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Linaceae | Linum striatum | Ridgestem Yellow Flax | Bogs, seepages, other wet places, often growing in Sphagnum. | MA, PA, MI, and IL south to Panhandle FL, LA, and e. TX. | 
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Linaceae | Linum sulcatum | Grooved Yellow Flax | Prairies; eastwards in dry rocky woodlands, barrens, and blackland prairies over calcareous, mafic, or ultramafic rocks (and sometimes also weedy in adjacent disturbed areas). | Primarily a species of the Great Plains of WI, MN, and s. ON, s. MB, WI, MN, and ND, to LA and TX, L. sulcatum occurs farther east (to MA, VA, NC, and AL) as a rare disjunct on glades or barrens over rocks such as limestone or diabase. | 
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Linaceae | Linum usitatissimum | Common Flax, Cultivated Flax, Linaza | Roadsides, other disturbed places, not long persisting after agricultural use. | Native of Europe. | 
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Linaceae | Linum virginianum | Virginia Yellow Flax | Dry or moist places. | MA, NY, ON, MI, and IL south to SC, GA, AL, and MO. | 
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Linaceae | Linum westii | West’s Flax | Bogs (seepage slopes), margins of flatwoods ponds. | Ne. FL; Panhandle FL. | |