Pennywort Hydrocotlye vericillata  grows 6  inches tall.

Shiny green leaver are 1 to 2 inches across.  Plant grows 6 to 12 inches tall

Full sun to part shade. Light green foliage with cream colored edge.

Forms a dense carpet. Good for areas of swift moving water like stream beds.

Hardy zone 6 or higher. Sun to part shade.  Keep pot even with the top of the water

This plant can be potted, or the rooted ends tucked into the rocks of a streambed or water fall.