Scientific Name: Hygrophila costata
Distinguishing Characteristics:
- Leaves arranged oppositely around stem; leaves have rough margins; primary and secondary leaf veins very distinct
- Small, white to pink flower in leaf axis; tiny leaves may also be present in leaf axis
- Stems and sometimes primary leaf vein dark red
- Usually grows in isolated clumps along shoreline, but can eventually surround shoreline
- Appearance and growth habit very similar to Alternanthera spp. which has a terminal white flower
