Sabulina fontinalis

{{Short description|Species of flowering plant}}

{{Speciesbox

| image = Stellaria fontinalis.jpg

| image_alt = Image shows the small, green flower

| status = G3

| status_system = TNC

| status_ref =

| genus = Sabulina

| species = fontinalis

| authority = (Short & R.Peter) Dillenb. & Kadereit (2014)

| synonyms = {{hidden begin|title = List}}

• Alsine fontinalis (Short & R.Peter) Britton (1894)
• Arenaria fontinalis (Short & R.Peter) Shinners (1962)
• Sagina fontinalis Short & R.Peter (1836)
• Stellaria fontinalis (Short and R.Peter) B.L.Rob. (1894)

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Sabulina fontinalis, commonly called American water starwort{{PLANTS|id=STFO|taxon=Stellaria fontinalis|accessdate=1 December 2015}} or Kentucky starwort, is a flowering plant in the family Caryophyllaceae. It is a very rare species, endemic to the Nashville Basin of Tennessee, the Kentucky River Pallisades of Kentucky, and in northern Alabama.{{BONAP|ref|genus=Cuphea|species=viscosissima|accessdate=20 January 2017}} It is found in wet limestone areas, often on cliffs or ledges where water seeps over the rocks.{{cite web |url=http://www.herbarium.unc.edu/flora.htm |title= Flora of the Southern and Mid-Atlantic States}}

Image:Stellaria fontinalis illustration.svgSabulina fontinalis is a winter annual forming dense colonies, which produce very small green flowers in the spring. It has been taxonomically difficult to place, sometimes being included in the genera Stellaria, Sagina, Minuartia, or Arenaria among others.[http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=250060931 Stellaria fontinals in Flora of North America] The most recent phylogenetic analysis suggests that it is best placed in the genus Sabulina.