Family | Scientific Name | Common Name | Habitat | Distribution | Image |
Euphorbiaceae | Tragia amblyodonta | Dogtooth Noseburn | Thornscrub. | S. TX west to se. AZ, south to n. Mexico (NCN, BCS, CHH, COA, NLE, SLP, SON, TAM, ZAC). | 
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Euphorbiaceae | Tragia betonicifolia | Betony Noseburn | Glades and dry bluffs, prairies, dry, sandy woodlands. | MO and KS south to w. LA and TX; disjunct eastward in KY, TN, and possibly AL (and apparently introduced in VA). | 
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Euphorbiaceae | Tragia brevispica | Shortspike Noseburn | Prairies, calcareous woodlands. | Nc. TX (and possibly sc. OK and w. LA) south through TX to ne. Mexico (COA, NLE, TAM). | 
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Euphorbiaceae | Tragia cordata | Heartleaf Noseburn | Rocky calcareous woodlands, calcareous prairies. | C. KY, s. IN to s. MO, south through c. TN, rarely to e. TN (Meigs County, in the Ridge and Valley Province) (Chester, Wofford, & Kral 1997), n. AL (Jackson Co.) (D. Spaulding, pers. comm.) to sc. and sw. GA, Panhandle FL, and e. TX. | 
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Euphorbiaceae | Tragia glanduligera | | Dry limestone soils, mesquital. | S. TX south through e. and c. Mexico to n. Central America (Guatemala). | 
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Euphorbiaceae | Tragia ramosa | Catnip Noseburn | Grasslands, woodlands, disturbed areas. | MO, s. NE, CO, UT, NV, and s. CA south to s. AR, TX, NM, AZ, and Mexico (BCN, CHH, COA, HGO, NLE, QRO, SLP, SON, TAM, VER). | 
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Euphorbiaceae | Tragia saxicola | Florida Keys Noseburn | Pine rocklands. | Endemic to s. FL (Miami-Dade and Monroe counties). | 
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Euphorbiaceae | Tragia smallii | Gulf Coast Noseburn | Longleaf pine sandhills, other dry woodlands. | Sw. GA south to c. peninsular FL, west to e. TX and sw. AR. Reports of T. betonicifolia from GA are based on misapplication of that name to material representing T. smallii. | 
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Euphorbiaceae | Tragia urens | Southeastern Noseburn, Wavyleaf Noseburn, Sandhill Noseburn | Longleaf pine sandhills, sandy woodlands, pine rocklands, other dry woodlands. | Se. VA south to s. FL and west to TX, mostly on the Coastal Plain, but ranging into the Piedmont and Mountains in NC, SC, GA, and AL. | 
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Euphorbiaceae | Tragia urticifolia | Nettleleaf Noseburn | Dry woodlands and rock outcrops, particularly over mafic or calcareous rocks. | Sc. VA west to n. AR, south to wc. peninsular FL, Panhandle FL, and c. TX. | 
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