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

It is native to the Southeastern United States where it is primarily found in the Piedmont.

[2] 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.

[1] This species is distinguished from the similar Geocarpon glabrum by having shorter leaves and petals that are not clawed.