''Geocarpon uniflorum'', the one-flower stitchwort, is a species of flowering plant in the family

Caryophyllaceae Caryophyllaceae, commonly called the pink family or carnation family, is a family (biology), family of flowering plants. It is included in the dicotyledon order Caryophyllales in the APG III system, alongside 33 other families, including Amaranth ...

. It is native to the

Southeastern United States The Southeastern United States, also known as the American Southeast or simply the Southeast, is a geographical List of regions in the United States, region of the United States located in the eastern portion of the Southern United States and t ...

where it is primarily found in the

Piedmont Piedmont ( ; ; ) is one of the 20 regions of Italy, located in the northwest Italy, Northwest of the country. It borders the Liguria region to the south, the Lombardy and Emilia-Romagna regions to the east, and the Aosta Valley region to the ...

. Its preferred habitat is sandy or granitic rock outcrops. The plants formerly referred to as ''Minuartia alabamensis'' have been shown to be a self-pollinating form of ''Geocarpon uniflorum'' that has arisen independently at various locations, and it is thus included under this species. Genetic evidence suggested that this species is best placed in the genus '' Mononeuria'', although that classification was not widely adopted.Flora of the Southern and Mid-Atlantic States
/ref> In 2022 it was placed in genus ''Geocarpon''. This species is distinguished from the similar '' Geocarpon glabrum'' by having shorter leaves and petals that are not clawed.

References

{{Taxonbar, from1=Q125219749, from2=Q15571706 Caryophyllaceae Flora of Alabama Flora of Georgia (U.S. state) Flora of North Carolina Flora of South Carolina Plants described in 1788 Taxa named by Thomas Walter (botanist)