The Genus Spergularia
1. Alkali Sandspurry: Spergularia diandra - Leaves mostly less than 1 mm wide. Leaf axils lack small bundles of leaves.
2. Sand Spurry: Spergularia rubra - Leaves often more than 1 mm wide. Stamens 10. Small bundles of leaves in the axils of the major leaves,
3. Salt Sandspurry, Saltmarsh Sandspurry: Spergularia salina var. salina (formerly Spergularia marina) - Leaves often more than 1 mm wide. Stamens 2-5. Leaf axils lack small bundles of leaves.