| Orobanchaceae | Buchnera americana | Prairie Bluehearts, American Bluehearts, Plains Bluehearts | Dry (seasonally moist) rocky, gravelly, or clayey soil of limestone glades, glades over mafic rock (such as diabase, gabbro, etc.), sand prairies, wet meadows, sandy roadsides. | From w. NY (historical) and s. ON west to MI, IL, MO, and s. KS, south to c. NC, GA, Panhandle FL, TX, and n. Mexico. | 
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| Orobanchaceae | Buchnera floridana | Savanna Bluehearts, Florida Bluehearts | Pine savannas, pine flatwoods, seepage bogs, calcareous prairies (Black Best of MS and AL), sandy roadsides. | Se. NC south to s. FL, west to TX; West Indies; scattered localities in s. Mexico and Central America. | 
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