Foamflowers in Alabama and Mississippi
iNaturalist recognizes five species of Foamflowers (Tiarella) in eastern North America, but in Alabama and Mississippi, there are just two: Tiarella wherryi and Tiarella austrina. Since Tiarella austrina is confined to just two counties in northeastern Alabama, Tiarella wherryi is the primary species in the region.
Distribution of Tiarella in Alabama counties (overlap in bold):
- Tiarella wherryi: Baldwin, Barbour, Blount, Calhoun, Cherokee, Clarke, Clay, Cleburne, Colbert, Conecuh, Coosa, Cullman, DeKalb, Elmore, Etowah, Franklin, Hale, Henry, Houston, Jackson, Lauderdale, Lawrence, Lee, Madison, Marengo, Marion, Marshall, Monroe, Morgan, Randolph, Russell, Saint Clair, Talladega, Tallapoosa, Tuscaloosa, Walker, Winston
- Tiarella austrina: Jackson, Madison
Distribution of Tiarella in Mississippi counties:
- Tiarella wherryi: Choctaw, Itawamba, Monroe, Tishomingo
Observations of Tiarella wherryi in Alabama:
- Observations of Tiarella wherryi in an expected county in Alabama
- Observations of Tiarella wherryi in an unexpected county in Alabama
Observations of Tiarella austrina in Alabama:
- Observations of Tiarella austrina in an expected county in Alabama
- Observations of Tiarella austrina in an unexpected county in Alabama
Observations of Tiarella wherryi in Mississippi:
- Observations of Tiarella wherryi in an expected county in Mississippi
- Observations of Tiarella wherryi in an unexpected county in Mississippi
Tips for identification of Tiarella species:
To distinguish species, look for stem leaves. Only Tiarella austrina has stem leaves.
For details, including a color-coded range map, see: Nesom, Guy L. (2021). "Taxonomy of Tiarella (Saxifragaceae) in the eastern USA" (PDF). Phytoneuron. 31: 1–61. (A shortened version of Nesom's paper was published by the North Carolina Botanical Garden in 2022.)
For more general information about Tiarella, see: Observing and identifying Foamflowers in eastern North America
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